Launch Dynamic Characteristics of Mortar Based on the Mohr-Coulomb Soil Constitutive Model

XU Ziyang; CHANG Huansheng; SUN Mingliang; LI Lei; YANG Guolai; LIU Hua; ZUO Juncheng; WANG fengfeng

doi:10.12382/bgxb.2026.0209

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Launch Dynamic Characteristics of Mortar Based on the Mohr-Coulomb Soil Constitutive Model

更新时间：2026-09-12

- Launch Dynamic Characteristics of Mortar Based on the Mohr-Coulomb Soil Constitutive Model
- ACTA ARMAMENTARII Pages: 1-24(2026)
- 作者机构：
  
  1.南京理工大学机械工程学院，江苏南京 210094
  2.成都陵川特种工业有限责任公司，四川成都 610105
  3.金陵科技学院，江苏南京 211169
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2026.0209
  CLC： TJ31
- CSTR：XXXXX.XX.XXX.2026.0209
- Received：05 March 2026，
  
  Revised：2026-06-25，
  
  Accepted：09 July 2026，
- 稿件说明：
移动端阅览
XU Ziyang, CHANG Huansheng, SUN Mingliang, et al. Launch Dynamic Characteristics of Mortar Based on the Mohr-Coulomb Soil Constitutive Model[J/OL]. ACTA ARMAMENTARII, 2026, 1-24.
DOI：

XU Ziyang, CHANG Huansheng, SUN Mingliang, et al. Launch Dynamic Characteristics of Mortar Based on the Mohr-Coulomb Soil Constitutive Model[J/OL]. ACTA ARMAMENTARII, 2026, 1-24. DOI： 10.12382/bgxb.2026.0209. CSTR： XXXXX.XX.XXX.2026.0209.

摘要

作为一种全新的迫击炮布局形式，车载迫击炮具备更高的火力机动性。目前的土壤本构模型难以描述速率效应和能量耗散行为，严重影响车载迫击炮发射过程动态响应的数值模拟精度。基于Perzyna黏塑性框架，开发一种基于Mohr-Coulomb的土壤本构模型。建立某型车载迫击炮的车体-座钣-土壤耦合系统的有限元模型，通过将仿真结果与射击试验中获取的座钣应力与位移数据进行对比，验证所提土壤本构模型在冲击工况下的计算精度与稳定性。进一步开展黏土与中硬土、±5°斜坡阵地、连续射击等工况的车载迫击炮动态响应计算。研究结果表明，在阵地适应性方面，黏土的黏滞阻尼效应导致其初始瞬态冲击应力与沉陷量均显著高于中硬土；±5°的斜坡阵地能有效耗散法向冲击能量，使座钣的垂向沉陷与反跳幅值衰减。通过连续射击与重力预压多分析步计算证明了土壤的冲击压实与刚度强化，该机制虽然有效限制了连射时的位移累积，但会使座钣在后续射击中承受显著升高的极值应力。所得成果可为复杂地形条件下车载迫击炮的阵地适应性评估、连射稳定性分析及座钣结构设计提供可靠的理论模型与数值依据。

Abstract

As a brand-new mortar layout， the vehicle-mounted mortars have higher fire maneuverability. The current soil constitutive model is unable to describe the rate effect and energy dissipation behavior， which seriously affects the numerical simulation accuracy of the dynamic response of vehicle-mounted mortar during launching. A Mohr-Coulomb-based soil constitutive model is developed based on Perzyna viscoplastic framework. A finite element model of body-baseplate-soil coupling system for a vehicle-mounted mortar is established， and the launching dynamics of the vehicle-mounted mortar is calculated by using the proposed soil constitutive model and the traditional M-C constitutive model， respectively. The calculation accuracy and stability of the proposed soil constitutive model under impact conditions are verified by comparing the simulated results with the stress and displacement data obtained from the shooting test . In this study， the dynamic responses of vehicle-mounted mortar under the working conditions of clay and medium hard soil， ±5 ° slope position and continuous shooting are further calculated. The results show that the initial transient impact stress and settlement amount of clay are significantly higher than those of medium hard soil due to viscous damping effect in terms of position adaptability. However， the slope position of ±5 ° can effectively dissipate the normal impact energy and attenuate the vertical subsidence and rebound amplitude of the baseplate. In addition， the multi-step calculation of continuous shooting and gravity preloading proves that the impact compaction and rigidity of soil are strengthened. Although this mechanism effectively limits the displacement accumulation during continuous shooting， it makes the baseplate bear significantly increased extreme stress in subsequent shooting. This study provides a reliable theoretical model and numerical basis for the evaluation of position adaptability， the analysis of continuous firing stability and the design of baseplate structure of vehicle-mounted mortar under complex terrain conditions.

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