迫击炮座钣－土壤耦合发射动力学分析研究

为研究某型迫击炮座钣在密实中硬土上发射过程中的结构强度问题，基于非线性有限元理论，建立了该迫击炮座钣与土壤耦合力学有限元模型，该模型考虑了土体本构模型、结构－土壤接触非线性关系；以静力学分析和动力学分析，得到座钣的应力分布规律以及座钣关键部位的动应力变化曲线；通过对比表明：相同条件下的两种加载方式，座钣的最大应力的位置基本一致，静力学分析的结果比动力学分析的结果大9％左右。计算与对比结果为对迫击炮座钣结构进一步优化提供参考依据。

Firing Dynamic Analysis of Coupling Mortar Base Plate-Soil

In order to study the strength of mortar base plate on the mid-hard soil during firing,a coupling nonlinear finite element model of mortar’s base plate and hard soil was built based on the nonlinear finite element theory.The nonlinear relations of soil constitutive model and interaction between structure and soil were considered simultaneously in the model.The stress distribution law and the dynamic stress curves of mortar base plate were calculated in the static analysis and dynamic analysis.By the comparing,it shows that the position of the maximum stress is similar in the same condition and the stress of static analysis is 9% larger than the dynamic analysis.The result provides a reference to the further optimization of mortar base plate structure.