Table of Content

31 August 2005, Volume 26 Issue 4

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Paper

Toss Motion of Amphibious Vehicle in Sea-way

XU Guo-ying, ZHOU Jing-tao, YAO Xin-min, GUO Qi-sheng

2005, 26(4):  433-437.  doi:10.3969/j.issn.1000-1093.2005.04.001

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The toss motion is a trouble for amphibious vehicle in sea-way. It may severely affect the battle effec?tiveness of crew in the vehicle. A linear toss motion in wave was described based on the wave resistance theory for snips in this paper. Resonance frequency and damping coefficients of vehicle and mechanism of suspension and propelling in roll and heave motions were obtained by experiment. Then, these coefficients are used to ana?lyze the possible toss motion of three typical vehicles in a sea area of our country.

Research on Thick Barrel’s Damages Due to Impaction by Fragments of High Explosive Projectile

SHEN Xiao-jun, ZHANG Peng-xiang, SUN Tao, LIU Juan, WANG Xiao-ming

2005, 26(4):  438-442.  doi:10.3969/j.issn.1000-1093.2005.04.002

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Explosive test and numerical simulation were carried out to examine the damage effects of high explo?sive projectile to thick tube. According to Tresca guide line and truck cylinder’s strength theories, the criteria of tube’s failure were deduced. The effects of fragment’s figure, aviation direction mass, velocity on damage were explored. The research results indicate that if high explosive projectile explodes near or in front of the thick steel tube in some short distance, the generated fragments’ impactions will cause clear damages to the steel tube. The given data and the analyses to damage law can be used as reference basis to analyses of thick tube ’ s viability and to design and improvement of warhead.

Study on Flight Trajectory for Hypervelocity Projectiles

WANG Zhong-yuan, SHI Jin-guang, YI Wen-jun

2005, 26(4):  443-448.  doi:10.3969/j.issn.1000-1093.2005.04.003

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The hypervelocity projectiles are easy to come forth aerodynamic heating and ablation pnenomena, when they flight. The distortion of ablation will affect air forces acting on the projectiles and their flight trajec?tories. The ablation distortion, air forces and exterior ballistics are interactional and interdependent. Thus, the flight trajectory solution for the hypervelocity projectiles is great different from general projectiles, and is focused in this paper. A numerical analysis for the flight trajectory was also carried out. Some results concluded are use?ful for further research.

Heat Transfer Model and Numerical Simulation for Terminally Guided Projectile in Heated Tube

ZHOU Yan-huang, CHEN Gui-dong

2005, 26(4):  449-452.  doi:10.3969/j.issn.1000-1093.2005.04.004

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A one-dimension transient heat transfer model for terminally guided projectile stayed in heated tube was established to study its thermal safety. The safe time and temperature response of the projectile were simu?lated and the results are validated by comparison them with the experiment data. The effects of firing rate, fir?ing round and environment temperature on the projectile were also investigated.

Quantum Chemistry Studies of Thermal Decomposition Mechanism on I, l'-DM-5,5'-AT and 2,2'-DM-5,5'-AT

HU Guosheng, WANG Da-xi

2005, 26(4):  453-459.  doi:10.3969/j.issn.1000-1093.2005.04.005

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The potential curves of thermal decomposition for I, I' -dimethy-5,5' -azotetrazole (l，I'-DM-5, 5' - AT) and 2,2' -dimethyl-5,5' -azotetrazole(2, 2'-DM-5,5'-AT) were calculated by use of ab initio calculation of quantum chemistry method, their decomposition mechanisms were explored. The thermal decompositions were accomplished m two steps, that is, opening ring and denitrification. Predicting mechanisms can be supported by the thermal decomposition experimental and theoretical results for substitution of tetrazole. The decomposition activation energies of two steps are 243.5 and 64.01 kj/mol respectively for I, I' -DM-5, 5' -AT. The decomposi?tion activation energies of two steps are 152.3 and 44.67 kj/mol respectively for 2，2'-DM-5,5'-AT. Opening ring reaction for two compounds controls the decomposition rate. The two-step decomposition activation energies of 1，I' -DM-5, 5'-AT are larger than that of 2，2'-DM-5，5'-AT. The thermal stability of 1，1' -DM-5, 5'-AT is better tnan 2, 2' -DM-5, 5'-AT, as indicated by dynamics.

Quantum Chemistry Studies on Structure and Thermal Stability of I,l'-DM-5,5'-AT and 2,2'-DM-5, 5'-AT

HU Guo-sheng, WANG Da-xi

2005, 26(4):  460-464.  doi:10.3969/j.issn.1000-1093.2005.04.006

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Equilibrium geometries of I, I'-dimethyl-5，〕-azotetrazole (I, I'-DM-5, D -AT) and 2, 2 -dimethyl- 5, D -azotetrazole2 -DM-5，5 -AT) were calculated with ab initio calculation of quantum chemistry method, and their structure characteristics, property of molecular orbital and stability were carefully analyzed. It is found that the structures of 1，l -DM-5, 5-AT and 2，2'-DM-5, 5'-AT are planar, the bond length in tetrazole ring has a tendency of averages on aromatic characteristic, and the tetrazole ring satisfies 4n + 2 rule. Calculated aro-maticity index, net charge in the ring and relation energy of electron show that the thermal stability of I, I -DM- 5，o -AT is better than 2, 2 -DM-5, 5'-AT. The theoretical analysis conclusion is in accord with the experiment result.

Application of Low Detonation Velocity Explosive in Geologic Exploration

DU Ping, HUANG Dong-ding, WANG Ze-shan

2005, 26(4):  465-468.  doi:10.3969/j.issn.1000-1093.2005.04.007

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A kind of high-energy low-detonation velocity explosive is studied m this paper, which can be applied to geologic explorations. Its manufacture method, capability, application in geology and the comparison with other Kinds of epicenter explosives are discussed. Being used as the epicenter explosive, it has wider frequency spectrum and better signal-to-noise ratio, and can improve signal-to-noise ratio and resolution of reflecting signal from stratum sections.

Design of Hardware-in-the-loop Simulation System for Gun Controller

ZHU Yun-zhao, WANG Shun-ting, CHANG Tian-qing, MIAO Ling-juan, ZHOU Qi-huang, MA Xiao-jun

2005, 26(4):  469-472.  doi:10.3969/j.issn.1000-1093.2005.04.008

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Adopting hardware-in-the-loop real-time simulation scheme, a simulation system of tank gun con?troller was developed. It consists of a simulation computer, a simulation controller, a gun control computer and some parts of tank gun control system. It can implement static measurements and simulations of stabilizing fol?lowing and moving gun. The simulation model of gun controller was built. The running section and samples of simulation system were designed. The simulation database for gun disturbance moment was established based on many real tests and theoretical analysis. The simulations for gun vibration at different speeds on different pave?ments are satisfying. "The comparisons between the test data and the simulation data show that this simulation system behaves very well on the dynamic characteristics oi the actual gun controller. It can be used not only to simulate the existing system, but also to be as a simulation platform for algorithm study and performance test in developing novel tank gun controllers.

Research on Sensitivity of Vehicular Laser Warning Device

GE Qiang-sheng, GE Qiang-lin, GONG Chi-kun

2005, 26(4):  473-476.  doi:10.3969/j.issn.1000-1093.2005.04.009

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The intensity of laser signal incident straightly on the surface of photoelectric detector of the warning apparatus was calculated under different atmospheric visibilities in this paper ? Both the target reflection and the atmospheric dispersion were considered also. The sensitivity of the vehicular laser warning device was discussed to provide a guideline for the development and design of the device. It is a core to determine the sensitivity in the design of the device. It affects the determination of the reconnaissance distance directly. The calculation results show that the vehicular laser warning device of several mille watts per square centimeter in sensitivity can detect laser signal of target reflection and atmospheric dispersion in common tactics circumstance.

Energy Absorption Factor in Calculation of Projectile Penetration Depth for Steel Fiber Concrete

WANG Bin, JIN Feng-nian, XU Ying,XU Han-zhong

2005, 26(4):  477-480.  doi:10.3969/j.issn.1000-1093.2005.04.010

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When a projectile penetrates materials, the materials are damaged and the projectile energy is consumed. Con-sequentially, the material toughness will affect the penetration depth significantly. But, the existing experiential formulas to calculate the penetration depth in steel fiber concrete can’t reflect its effect. In this paper, an energy absorption factor of material is introduced and the test data were regressed to establish a modified formula which can reflect not only the ef?fect of the material toughness but also the intensity in the penetration process. This formula is applicable for the calcula?tion of penetration depth in the steel fiber concrete and provides an important reference for the relevant projects and scien?tific researches.

Resistance and Property of Ceramic Target Against Shaped-charge Jet Penetration

WEI Xue-ying, ZHANG Chun-yan, MA Shu-fang

2005, 26(4):  481-485.  doi:10.3969/j.issn.1000-1093.2005.04.011

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An analytical model for ceramic target resistance against shaped-charge jet penetration was presented in this paper. The target resistance equation based on the quasi-static cavity expansion theory was derived. Both the target strength under high velocity penetration and the ceramic crack interference factor on the broken shaped-charge jet were all considered in the model. A relationship between the velocity of jet tip and penetration velocity was obtained. The predicted values are compared with some experiment results, and show better consis?tence with them ? The influence of target resistance on the penetration velocity and the criterion that distinguish?es if the ceramic material can be treated as liquid state is investigated.

Development and Application of Anti-Wear Lubricant for Military Vehicle Engines

SHI Pei-jing, XU Bin-shi, XU Yi, LIU Qian, QIAO Yu-Iin

2005, 26(4):  486-491.  doi:10.3969/j.issn.1000-1093.2005.04.012

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A novel full formula of anti-wear lubricant was developed on the basis of traditional lubricant of equipped engines by selecting and optimizing some functional additives. Its tribological properties were tested on several tribotesters simulating different working conditions, the application performance was investigated on e- quipped engines, and the anti-wear and friction-reducing mechanisms were discussed also. The results show that? the experiment times are reduced and the ingredients are optimized by way of uniform design and synergistic ef?fect research. Compared with the traditional lubricant, the extreme pressure and anti-wear properties of this lu?bricant under high temperature and heavy load conditions are increased by 40.8% , 56.7% and 82.6% , respec?tively, and the friction-reducing property is improved by 45% also. Moreover, this anti-wear lubricant can im?prove engine’s power performance and prolong the service life. The mechanism is inferred that the lubrication and integrated properties of traditional lubricant are improved by tribochemical reactions and synergistic effects of the functional additives.

Experiment and Calculation of Vibration Modal of a Military Engine

WU Jun-qing

2005, 26(4):  492-495.  doi:10.3969/j.issn.1000-1093.2005.04.013

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To research the dynamic properties of military engines, experiment analysis and finite element calcula?tion were adopted. Based on the correct 3-D solid models of body, crankshaft, cylinder head and crankcase, an integrated engine model was built in this paper. Virtual materials were introduced to simulate the stiffness and damping features of the joint surfaces between those four elements, which are difficult to obtain either theoreti?cally or experimentally. Property parameters of the virtual materials were gradualy modified until FEM result of the engine’s vibration modal became consistent with the experiment result. Thus, the validity of the finite ele?ment model of the engine was proved, which paves the way for further engine dynamic simulation research.

Feature Selection of Seismic Pattern Recognition of Nuclear Explosion Based on Ordinal Optimization

LI Xi-hai, LIU Dai-zhi, ZHANG Bin, ZHAO Ke

2005, 26(4):  496-499.  doi:10.3969/j.issn.1000-1093.2005.04.014

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Feature selection is a very important and difficult problem in the pattern recognition of underground nuclear explosions and natural earthquakes. To solve this problem, a new method for feature selection based on ordinal optimization was presented in this paper, and an experiment based on blind picking rule was carried out. Experiment results and corresponding analysis indicate that this method can reduce the search space greatly and enhance the search efnciency. The blind picking rule is applied to the feature selection of underground nuclear explosions and natural earthquakes, and the recognition rate reaches up to 97.5 % . It may be a novel solution for the feature selection of underground nuclear explosion and natural earthquake events.

Measuring Method and Applying Circuit of Dispersed Frequency for Detecting Weak Capacitance Signal

LIU Jun, XU Pei, SHI Yun-bo

2005, 26(4):  500-504.  doi:10.3969/j.issn.1000-1093.2005.04.015

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The detecting methed of weak capacitance signal and integrative circuit are important factor of confin?ing the development of the micro inertia devices. A way of converting the weak capacitance signal to frequency signal based on the good anti-disturbed ability of the frequency signal was introduced in this paper so that we can measure the acceleration signal through measuring the dispersed frequency, and then we can directly read out the acceleration through the times of step frequency to the dispersed frequency point. We have made it out through the hardware circuit, and validated the result of the experiment, which is consistent with the theory simulation.

Relation Between Ablating Rate and Surface Heating Power

WU Zhao-chun

2005, 26(4):  505-509.  doi:10.3969/j.issn.1000-1093.2005.04.016

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An approximate solution for the one-dimensional ablation problem by use of integral method was pre?sented in tms paper. Using one-dimensional heat transfer model and dividing the ablation process into two stages, 1.e.，initially heating object up to melting temperature and starting ablation process, an approximate ex?pression for the relation between the ablating rate and surface heating power was established. Some calculations and analysis for three examples under different ablation rates were demonstrated.

Simulation of Melted State of Particles in Plasma Spray

FAN Qun-bo, WANG Lu, WANG Fu-chi

2005, 26(4):  510-514.  doi:10.3969/j.issn.1000-1093.2005.04.017

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Melted state of flying ZrO2 ceramic particles in plasma spray has been investigated in this paper by em?ploying numerical simulation methods. Calculations are carried out for two kinds of single particle with diameters of 30 μm injected in typical piasma spraying conditions. Surface temperature histories of the flying particles, in?ner thermal state, temperature gradient as well as phase change of the particles of various sizes during their flight are successfully predicted. Based on these results, the spraying distance is discussed also, which can be classified into three regions, such as no melted, partially melted and completely melted zones. Only if the particles enter into completely melted zone, it is possible to form dense and idea coatings. These methods and results will bring insight into the practical thermal spray operations.

Precision Forming Technique of Ultra-High-Strength Steel Shell Body With Thin Wall and Deep Blind Hole

WU Tai-bin

2005, 26(4):  515-518.  doi:10.3969/j.issn.1000-1093.2005.04.018

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The precision forming technique of ultra-high-strength steel shell body with thin wall and deep blind hole was formed by a proper arrangement of deformation processes, suitable distribution of deformation degree, reasonable blank design and choice of cold and warm forging dies. It is applicable in the batch production. The key problem in ultra-high-strength steel sheel body machining was solved. It provides an practical, economical, effective and reliable precision forming technology for ordnance and aerospace industries.

Wear Mechanism of Cemented Carbide Insert in Milling of High-strength Steel

XIE Li-jing, LIU Zhi-bing, WANG Xi-bin

2005, 26(4):  519-522.  doi:10.3969/j.issn.1000-1093.2005.04.019

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A certain high-strength steel is a kind of difficult-to-cut material. End face milling experiment was carried out on the material by using cemented carbide inserts added TaC, NbC. Cutting tool life and distribution range of milling temperature on the rake face were obtained under different cutting rates. Wear characteristic and mechanism of the insert were also studied with the aid of scanning electron microscope(SEM). The results show that the diffusion wear of hard phase is intensified after the tear and shear of the adhering layer on the flank. The wear form on the rake face is characterized, as broad crater, which is directly influenced by the distri?bution of milling temperature. Furthermore, the depth of the crater as well as the degree of oxidation and diffu?sion wear increase along the direction of the chip flow-out.

Green Manufacturing Process Assessment by DEA Method

ZHANG Hua, WANG Xi-bin

2005, 26(4):  523-527.  doi:10.3969/j.issn.1000-1093.2005.04.020

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The green assessment technology is an important part of the green manufacturing. The Analytic Hier?archy Process is often used in the assessment of some evaluated objects and methods, but it is not applicable to the manufacturing process assessment. A concept of green manufacturing process assessment was presented in this paper, which uses DEA model. Each concrete action in the manufacturing process is regarded as a DMU (decision making unit) in DEA. Except inputs and outputs considered usually, the effects to environment in the manufacturing process are also treated as the outputs to assess the relative green efficiency of the manufacturing process. DEA method needs not to specify the assessment index weights beforehand, but it can also be used in case of specined weights. The use of DEA can efficiently reflect the constantly changing process of green degree in the specific manufacturing process under the invariable equipments and products. An example of the DEA in the green assessment of powder manufacturing was introduced finally.

An Estimation Method of Ammunition Storage Life Based on Poisson Process

ZHENG Bo, XU He-gui, JIANG Zhi-bao

2005, 26(4):  528-530.  doi:10.3969/j.issn.1000-1093.2005.04.021

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For the ammunition with the characteristic oi long storage and only one time use, its storage reliability is a very important factor. On the basis of ammunition failure feature in storage conditions, applying the Poisson process theory, a mathematic model and a method for statistical analysis were set up. A relationship between storage life and reliability under a certain confidence was given.

Analysis and Design of Assessment System for Damage Degree of Equipment on Battlefield

ZENG Yong-hua，YAN Jun, FENG Ke, LING Hai-feng, CHEN Hai-song

2005, 26(4):  531-534.  doi:10.3969/j.issn.1000-1093.2005.04.022

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According to demands of assessment of each functional state and the damage degree for a whole equip?ment in studies of simulations of equipment support in wartime and equipment damage laws in battlefield, the demands, system structure and evaluation means of the assessment system of equipment damage in battlefield were discussed by use of analytic hierarchy process (AHP) in tms paper. The system structure and some flows were established, which syncretizes the equipment function structure analysis, the damage tree analysis and the damage degree evaluation. It forms a foundation for the equipment support in wartime and the maintain simula?tion.

Experimental Techniques and Analysis

erodynamic Interference Wind Tunnel Experiment Investigation for Dispenser and Submunition

LEI Juan-mian, WU Jia-sheng, XIAO Ya-bin

2005, 26(4):  535-539.  doi:10.3969/j.issn.1000-1093.2005.04.023

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The feature of the aerodynamic interference wind tunnel experiment for submunition and the composi?tion of the experiment devices are introduced in this paper. Using this scheme, the dispenser-submumtion aero?dynamics interference experiment was carried out. The experiment results show that the interference of the drag coefficient and the lift coefficient vary violently as the axial position changes, and decrease as the submunition movement away from the dispenser in vertical direction. The angle of attack of the submunition doesn’t play a role in the aerodynamic interference. The aerodynamic interference is very strong in the zone of the dispenser’s empennage. The dispenser’s wake affects the drag of the submunition acutely. It should be studied in detail that how to define the boundary of the aerodynamic interference zone for the dispenser and submunition in the sub?sonic flow.

Factorial Study on Characteristics of Magnesium Alloy in High-speed Face-milling Process

ZHAO Wen-xiang, WANG Xi-bin, LONG Zhen-hai, PANG Si-qin

2005, 26(4):  540-544.  doi:10.3969/j.issn.1000-1093.2005.04.024

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In nign-speed cutting condition, cutting velocity from 471 m/min to 2356 m/min, factorials design and uniform design were applied to the high-speed milling experiments of magnesium alloy. The characteristics of this material in high-speed cutting process were analyzed and a nonlinear mathematical model of the relation?ship between cutting force and depth of cut, feed per tooth, cutting velocity was proposed. Experiments indicate that, under the high-speed cutting condition, the interaction of cutting velocity and feed per tooth is one of statistic significant effects on cutting force; the relationship between cutting force and cutting parameter is non?linear and the effect of one cutting parameter on cutting force is sensitive to the choice of other cutting parame?ters.

On-line Monitoring and Diagnosis System Based on Telemetry for Large Weapon Equipment

ZHOU Zhao fa, TAO Jian-zhong, CHEN Xue-song, HUANG Xian-xiang

2005, 26(4):  545-548.  doi:10.3969/j.issn.1000-1093.2005.04.025

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Aimed at huge systems and difficult fault diagnosis of some large weapon equipments, a scheme of on?line monitoring and fault diagnosis based on wireless telemetry technique was presented in this paper. Each test instrument is fixed directly on the equipment and communicates signal and command with a host computer wire?lessly .In this way, cable connections between the host computer and test instruments are greatly reduced, and then the diagnostic system can be portable and miniature. Combined multilevel distributing measurement and single-board multi-chip technology, high speed acquisition of test signal was implemented. Auto-search and on?line monitoring of working state of the equipment were actualized by use of pattern recognition and neural net?work technologies. Experiment results show that this system can implement expeditious and accurate fault posi?tioning and long-range monitoring for large weapon equipments.

Short Papers

Application and Realization of Adaptive Erodent Algorithm in Spheral Target Segmentation

WANG Jian-hua, ZHU Yuan-chang, WANG Chun-ping, JIA Hong-tao

2005, 26(4):  549-552.  doi:10.3969/j.issn.1000-1093.2005.04.026

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In the field oi image processing, target segmentation is necessary for target recognition. In some cir?cumstances, the target to be recognized is connected with other targets and their gray level is similar. Thus, it’ s difficult to separate target using a single threshold. In this paper, segmentation method for characteristic target (sphere) was analyzed, and a new method for segmentation named adaptive structuring element was introduced. This method makes up for the drawback resulted from fixed structuring element for target with different size. The trait of open operation and the method of adaptive structuring element go into particulars, and the segmen?tation of sphere target is settled in special circumstances, and it is programmed with Visual C + + 6.0. At last, segmentation results were compared in several conditions.

Abrasion and Erosion on Military Equipment by Sand and Dust

MA Zhi-hong, SU Xing-rong

2005, 26(4):  553-556.  doi:10.3969/j.issn.1000-1093.2005.04.027

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The abrasion by sand and dust is the main factor of failure of military equipment. Various abrasion modes，such as erosion, abrasion and corrosion were surveyed and a review of erosion was introduced in this pa?per .Bitter ’ s formula was discussed in detail and validated by experiments. It provides the gist to predict the de?terioration for military equipment.

Research Notes

Condition Evaluation for Diesel Engine Based on Grey Relation Analysis

QU Xiao-hui, QIAO Xin-yong, CHEN Mei, AN Gang

2005, 26(4):  557-559.  doi:10.3969/j.issn.1000-1093.2005.04.028

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As a complex system, diesel engine is difficult to be evaluated satisfactorily by only one or a few char?acteristic parameters. A method of multi-parameter fusion can be used to improve the evaluation validity. The grey relation analysis is a valid approach fusing multiple parameters. The condition evaluation for diesel engine was implemented by the grey relation analysis is this paper. Based on the theoretical analysis and a lot of con- tradistinctive experiments, eight important parameters and fiducial parameters for each condition were deter?mined .On the above basis, a model of condition evaluation for diesel engines was established. It was validated in other diesel engine tested. The results show that the evaluation method proposed in this paper is simple in calcu?lation, hign veracious and effective.

Effect of Guidance Information Extraction in One-dimension Phased Array Fuze on Burst Angle Error

LIU Jian-feng, ZHUANG Zhi-hong

2005, 26(4):  560-565.  doi:10.3969/j.issn.1000-1093.2005.04.029

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The initiating point may be lagged when traditional angle-fixed fuze heads off TBM. Although it can be solved if the fuze beam is pitched, the fuze design difficulty will increase. Combined with a burst angle algo?rithm, this paper uses a beam control technology of the one-dimension phase array fuze to change the fuze beam adaptively and achieve the optimal initiating control. Two initiating control algorithms were deduced and their merits and defects were described also.

TFN-AHP Model for Performance Evaluation of Missile Systems

CAO Jian, LI Ping, ZHOU Gen-gui

2005, 26(4):  566-569.  doi:10.3969/j.issn.1000-1093.2005.04.030

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To reduce the complexity of performance evaluation for missile systems, a model based on analytic hi?erarchy process (AHP) and basic theory of the trigonometrical fuzzy number (TFN) was given and correspond-ing evaluation process was described in this paper. Applying TFN and LLSM to AHP makes the model combine subjective analysis with quantitative analysis effectively, synthesize expert group opinions adequately and acquire the consistent degree of decisions for each index. In addition, the model can be programmed easily and applied widely due to its simple, normative arithmetic formulas.

Research on Ultrasonic Scan Imaging for Glass Fiber Materials

WANG Hao-quan, ZENG Guang-Yu

2005, 26(4):  570-572.  doi:10.3969/j.issn.1000-1093.2005.04.031

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Based on the analysis for the acoustic field of ultrasonic wave, using the ultrasonic detection method in time domain, the C display in depth and the characteristics of ultrasonic imaging for glass fiber materials were discussed in this paper. The experiment results show that the method can detect tiny flaws in the glass fiber ma?terials .

Study on Fault Knowledge Acquisition Based on Simulation

HUANG Kaoli, LIAN Guang-yao, WEI Zhong-lin

2005, 26(4):  573-576.  doi:10.3969/j.issn.1000-1093.2005.04.032

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Aiming at lacking fault diagnosis experiential knowledge and difficult knowledge acquisition, a knowl?edge acquisition method based on simulation was put forward in this paper. firstly, it makes use of the deep- knowledge of weapon systems to analyzing the failure mechanisms of the systems. Then, the models, able to be used in simulation, of faults are built up, and the premonition information of faults can be obtained after simula?tion. Finally, based on the comprehensive analysis of the simulation results, the fault diagnosis knowledge avail?able in the expert system can be gained. It is testified by practices that this method can find high reliable fault information, and has great significance in acquiring fault knolwedge for novel equipped weapons.