考虑限位器动态特性的摆弹臂碰撞动力学分析  

Dynamic analysis on impacting system of swing arm considering dynamic characteristics of stopper

作　　者：岳鹏飞 王德石[1] YUE Peng-fei;WANG De-shi(College of Weaponry Engineering, Naval Univ. of Engineering, Wuhan 430033, China)

机构地区：[1]海军工程大学兵器工程学院,武汉430033

出　　处：《海军工程大学学报》2020年第5期21-26,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(11372350);国家自然科学青年基金资助项目(11602300)。

摘　　要：为研究火炮射击过程中摆弹臂撞击限位器的振动特性,首先建立了考虑限位器惯性的梁杆碰撞动力学模型,根据Duhamel积分原理和接触条件,给出接触力级数形式的解析解;然后,针对限位器的弹簧阻尼模型和弹性杆模型,对不同扰动加速度下的摆弹臂振动位移响应进行了数值仿真,进一步分析了限位器安装位置和接触刚度对摆弹臂振动特性的影响。研究结果表明:扰动条件下,摆弹臂的振动位移幅值增大,变化规律更趋复杂,梁杆碰撞模型可以反映限位器动态特性对摆弹臂动力学响应的影响;为了控制摆弹臂振动位移幅值,应该减小限位器与摆弹臂负载端的距离,并且设计合理的接触刚度和初始间隔。该研究结果可为摆弹臂和限位器的优化和设计工作提供一定的理论依据。In order to study the vibration characteristics of artillery swing arm impacting the stopper during firing,the dynamic model of beam against rod considering the inertia effect of stopper was established.Using Duhamel integral principle and the contact relationship,the series analytical solution for contact force was derived.For spring damping model and elastic rod model of stopper,the vibration displacement responses of swing arm were calculated under different excitation accelerations.Furthermore,the influences of installation position and stiffness of the stopper on the vibration characte-ristics of swing arm were analyzed.Results show that vibration displacement of swing arm becomes greater and more complex under excitation acceleration,and the model of beam against rod can reflect the influence of dynamic characteristics of stopper,and that reducing the distance between the stopper and the load end,as well as designing reasonable contact stiffness and initial interval are beneficial to controlling the vibration displacement amplitude of the swing arm.The research results are available for the design and optimization of artillery swing arm and the stopper.

关 键 词：摆弹臂 限位器 梁杆碰撞 动态特性 振动幅值 

分 类 号：TJ303.9[兵器科学与技术—火炮、自动武器与弹药工程]