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HE D Z , WANG Q S , ZHONG R , et al. A unified analysis model of FGM double-layered submarine type coupled structure with spectral geometry method [J ] . Ocean Engineering , 2023 , 267 : 113213 .

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JIN W , JIANG J W , MEN J B , et al. Investigation on dynamic response behavior characteristic of the confined powder under impact loading [J ] . Acta Armamentarii , 2024 , 45 ( S1 ): 183 - 190 . (in Chinese) DOI: 10.12382/bgxb.2024.0026 http://doi.org/10.12382/bgxb.2024.0026 The density evolution and distribution characteristics of powder in a submunition under impact loadingare studied. Based on the porous material model and the test parameters of the powder, a simulation model of impact loading is established by using finite element analysis software. Machete impact tests under typical working conditions are compard. The simulated results are constant with the test results. The simulated results show that the density change of powder in the submunition during impact loading can be divided into the stable and growth stages, which can form four regions: densification, growth, retention and interspace regions. The width of each region changes linearly with the loading time, and the density distribution of powder has a significant gradient difference. The research results can provide reference for the investigation on the dynamic behavior of submunition which is impacted by the distribution changes of powder.

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XU Y F , WANG J , LIU P K , et al. Influence of different numbers of rounds under continuous firing on gun barrel life [J ] . Acta Armamentarii , 2023 , 44 ( 4 ): 1034 - 1040 . (in Chinese) DOI: 10.12382/bgxb.2021.0852 http://doi.org/10.12382/bgxb.2021.0852 The artillery is used with different charges of different types of ammunition (strong charge, full charge, reduced charge, high temperature charge, etc.), and have to undergo rapid continuous firing and performance test firing. It is necessary to study the impact of different charges of different types of ammunition and the number of rounds under rapid continuous firing on the barrel life. At present, for the assessment of barrel life, the method used is mainly to convert the number of projectiles of different types of ammunition into that of standard ammunition or standard ammunition with a specified ratio through the equivalent conversion factor in the national military standard. The existing national military standard equivalent conversion method for barrel life only includes two factors, chamber pressure and muzzle velocity, and does not consider the impact of rate of fire and number of rounds on barrel life, which makes it impossible to effectively evaluate barrel life under different numbers of rounds under continuous firing. The thermochemical ablation model of barrel material is established based on the Arrhenius equation. The influence of different numbers of rounds under continuous firing on the barrel life is studied. The larger the number of rounds under continuous firing, the shorter the barrel life. The accuracy of the thermochemical ablation model is verified by comparing the simulation and test results.

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MENG S , ZHONG R , WANG Q S . Stationary random response analysis of three-dimensional sandwiched cylindrical shells [J/OL ] . Journal of Vibration Engineering , 1 - 8 [ 2024-08-29 ] . http://kns.cnki.net/kcms/detail/32.1349.TB.20231212.1333.002.html http://kns.cnki.net/kcms/detail/32.1349.TB.20231212.1333.002.html http://kns.cnki.net/kcms/detail/32.1349.TB.20231212.1333.002.html. (in Chinese)

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