压力载荷与温度场作用下弹壳弹膛系统的动态响应

Thermal Stress Analysis for Shell-chamber System Subjected to Pressure Load and Temperature Field

针对热对弹壳弹膛系统的影响,基于弹、塑性力学及接触理论和弹壳、弹膛系统受热的物理过程,建立了考虑由热载荷和压力载荷共同影响的某小口径枪械弹壳弹膛系统的数学和物理模型。采用非线性有限元法和热、结构耦合单元Plane13,在ANSYS软件环境下,通过加载火药燃体的温度历程,进行了数值分析,获得了弹壳、弹膛系统在瞬态热载荷和瞬态压力载荷同时作用下弹壳弹膛系统热应力特性,结果表明热对弹壳弹膛系统的影响不容忽视的。

For the thermal effect, a mathematics model and a physics model for the shell-chamber system of a small caliber weapon, were built to consider the influence of the thermal and pressure based on the heated process in the system and the theories of elastic, plasticity and contact. The nonlinear finite element and the element Plane 13 of coupling thermal and structure in ANSYS were used in numerical simulation. The temperature loading process of propellant gas, the characteristics of the thermal stress is obtained when the transient heat and pressure loads act on the shell-chamber system simultaneously. The simulation results show that the thermal influence can not be ignored for the shell-chamber system.