摘要
在火炮开闩过程中,炮闩系统常因发生剧烈碰撞而损坏。针对炮闩动态应力响应问题,基于接触有限元理论,运用ABAQUS软件建立了某火炮炮尾炮闩系统的非线性结构动力学模型,模拟炮闩机构中复杂的接触碰撞现象,并采用隐式时间积分方法仿真模拟开闩过程,研究火炮复进过程中开闩凸轮撞击开闩板时及开闩过程中的炮尾炮闩结构中主要部件的动态应力响应,通过对结果的分析,获得主要部件动态应力大小。研究结果表明,火炮零件能够较好地满足强度要求,但抽筒子所受应力较大,其计算结果可以为改进曲柄、闩体结构提供依据。
The breech mechanism is always damaged by the serious impact during the process of breechblock-opening.Aim at the dynamic stresses response,a nonlinear structural dynamic model of artillery's breech mechanism has been established based on the contact finite element theory with ABAQUS to simulate the complex contact and impact in the breech mechanism. In the model,the implicit time integration method is used to simulate the process of opening block to study the dynamic stresses on the main parts of artillery's breech mechanism when the opening latch cam has an impact on the opening latch plate in the process of counter-recoiling. The dynamic stresses on the main parts can be obtained by analyzing the results. The results show that the parts of artillery can satisfy the strength requirement of material and the stress on extractor is big,so that the calculation results can provide reference for changing the structural design of crank and breechblock.
出处
《机械科学与技术》
CSCD
北大核心
2015年第3期361-365,共5页
Mechanical Science and Technology for Aerospace Engineering
关键词
动态应力
接触
动力学
炮尾炮闩
ABAQUS
breech mechanism
calculations
computer simulation
dynamics
finite element method
impact testing
implicit time integration method
mathematical models
mechanisms
mesh generation
nonlinear structure
stress concentration
stresses
structural dynamics
