牵引火炮非线性有限元隐式动力学分析

研究牵引火炮全发射过程非线性结构动力学有限元建模和分析中的关键问题。建立了某牵引火炮含身管与摇架导轨之间大位移滑动接触的非线性结构动力学有限元模型，运用隐式时间积分动力学方法模拟了该炮发射的后坐一复进过程，获得了炮架关键部位应力、应变和位移的瞬态响应，计算结果与实验测试结果基本一致。研究表明：该文的建模原理和数值模拟策略突破了火炮全发射过程总体结构动态应力分析的瓶颈。利用该文方法可以进一步研究火炮发射时的动态刚强度、冲击振动、结构动态稳定性等问题。

Implicit Dynamics Analysis of Nonlinear Finite Element for Towed Howitzer

The key problems of finite element modeling and analysis of nonlinear structural dynamics for the whole firing course of towed howitzer are investigated. The finite element model of nonlinear structure dynamics of a towed howitzer is established, which accounts for large sliding contact between barrel and cradle guide track oi the howitzer. The recoil and recuperation process of the howitzer is simulated by implicit time integration dynamics method. The dynamic responses of stress, strain and displacement on critical locations are obtained through the simulation, some of which are compared with those from firing test and a satisfied agreement is made. The research results indicate that the bottle-neck of dynamic stress analysis of the howitzer's overall structure during the whole firing course is broken through the modeling and the numerical simulation approach put forward in this paper. Dynamic strength and stiffness, vibration by impact, dynamic stability of howitzer structure can be further investigated by using the approach of this paper.