某迫击炮身管结构优化分析

考虑采用新型工艺后材料最大弹性极限，研究了某迫击炮身管壁厚减薄的结构优化方法。首先，采用有限元方法进行静态分析，通过三维软件 UG建立了身管实体模型。对身管结构进行合理简化后，导入到 ANSYS中进行膛压分析计算，得到了身管不同位置管壁所受应力随壁厚减薄的变化曲线。综合分析各种壁厚减薄方案，得到了身管承载性能最优的方案，并采用流固耦合动态响应加以验证。结果表明，静态分析结果较动态分析结果更接近真实受力状况。最终，迫击炮身管结构重量经仿真优化后可减轻13%，因而，该身管轻量化方法有效而可靠。

Analysis of barrel structure optimization for a mortar

Considering the maximum elastic limitation of the used material with newly advanced technology,the study focuses on optimization of a mortar barrel structure by thinning the wall to reduce the weight.Firstly,static analysis of barrel structure parameters is done based on finite element analysis (FEA)method and 3D solid model of the barrel is established based on Uni-graphics NX (UG).Secondly,the 3D solid model is simplified and transplanted to ANSYS for barrel wall pressure calculation. Thus,the change curves of the stress exerted on the barrel wall at different locations perpendicular to the axial direction with wall thinning are drawn.By analyzing all possible optimization schemes,the optimal design that enables the barrel to have higher bearing capacity is got.The optimized barrel structure is verified by means of fluid-solid coupling dynamic response anal-ysis.The results show that the static analysis results are closer to real stress conditions than dynamic analysis results.Finally, the barrel weight is reduced by 1 3% after simulation optimization and the light weight design of the barrel is effective and relia-ble.