考虑耳轴间隙的自动炮射击过程动态响应分析

基于多体动力学理论建立了考虑耳轴轴承间隙非线性的某型步兵战车自动炮刚柔耦合发射动力学模型.应用ANSYS有限元分析软件建立了双炮身管结构有限元模型并结合自动炮射击过程中力学特性和约束特性分析建立了自动炮刚柔耦合发射动力学模型;应用有限单元法对耳轴轴承间隙非线性进行了参数辨识,并准确分析了自动炮射击过程中耳轴轴承间隙对炮口扰动的影响,分析结果表明基于有限单元法的间隙非线性参数辨识方法能准确描述含间隙耳轴轴承的接触特性,为分析自动炮射击精度提供了准确的模型基础.

Dynamic response analysis on auto-gun launching via trunnion clearance

A firing dynamical model for infantry combat vehicle auto-gun rigid-flexible-coupling is first established based on multi-body dynamical theories with consideration of trunnion bearing clearance nonlinearity. Then, a finite element model of gun barrel and turret is developed using ANSYSTM. By analyzing the dynamical properties and constraints during auto-gun launching process, the rigid-flexiblecoupling firing dynamic model is set up. Next, the trunnion bearing clearance nonlinearity parameters are identified using Finite Element Method （FEM）. Finally, the trunnion bearing dynamical response properties, together with the impact of bearing clearance on gun barrel excitation are accurately analyzed. Therein, it is found from the analysis results that the contact property of clearance-related trunnion bearings can be accurately described using the FEM--based clearance nonlinearity method to set a modeling basis on auto-gun firing precision.