枪管强度的理论计算与数值计算的误差分析

针对现有文献对枪管强度计算的误差分析缺乏研究的问题，笔者将给出枪管强度计算的误差来源及提高求解精度的方法。笔者基于Abaqus软件对某枪管强度进行数值计算，并采用最大线应变准则、最大切应力准则和第四强度理论进行计算，将理论计算结果与仿真结果进行对比，并给出了离散误差和数值误差对计算结果的影响。仿真结果表明：采用第四强度理论作为枪管设计和校核的理论依据较为合理，采用C3D8I单元类型计算结果比C3D8R单元类型计算结果更加逼近第四强度理论计算结果。

Error Analysis of Theoretical Calculation and Numerical Calculation of the Gun Barrel Strength

Due to the lack of gun barrel strength calculation of the error analysis, this paper will analyze the gun barrel’s strength with Abaqus software, and calculate the gun barrel’s strength with the maximum strain criterion, the maximum shearing stress criterion and the fourth strength theory, then compare the simulation results with the theoretical calculations. The effect of discretization error and numerical error on calculation results will be given. The calculation results show that using the fourth strength theory as a theoretical basis for designing and checking is more reasonable. The simulation results present that the C3D8I element type calculation results are more close to the fourth strength theoretical solution than the C3D8R element type.