发射载荷作用下特种车辆动态响应仿真分析与优化  

Simulation Analysis and Optimization of Special Vehicle Dynamic Response Under Launch Load

作　　者：闫江 黄通 郭保全[2] 朱家萱 高钦和 YAN Jiang;HUANG Tong;GUO Baoquan;ZHU Jiaxuan;GAO Qinhe(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Research Institute of Intelligent Weapons,North University of China,Taiyuan 030051,China;College of Missile Engineering,Rocket Force University of Engineering,Xi’an 710025,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中北大学智能武器研究院,山西太原030051 [3]火箭军工程大学导弹工程学院,陕西西安710025

出　　处：《中北大学学报（自然科学版）》2024年第4期488-495,共8页Journal of North University of China(Natural Science Edition)

摘　　要：基于HyperMesh-LS-DYNA有限元建模与仿真方法,探究了特种车辆在发射载荷作用下车体的稳定性问题。以某型特种车辆为研究对象,在车辆数值仿真模型中构建了悬架等相关柔性化组件,对车体在发射载荷作用下的稳定性进行分析,发现发射载荷未能均匀分散到各支撑结构,且在发射底座、 g-h轴对应轮胎与地面的接触压力较大,发射筒摆动幅度较大。基于上述结果,提出调整支腿结构的刚度阻尼系数和增加附加支撑结构两种优化方案,以达到减小车辆与地面的接触压力以及车体纵向摆动幅度的目的,并进行了仿真验证。结果表明,辅助支撑的数量与位置对车体稳定性的影响较大,靠近底座以及数量越多,对车体稳定的保持效果较好,其中在g-h轴之间增加一对附加支腿,底座接触力减少16%;在b-c、 g-h轴之间同时各增加一对附加支腿,底座接触压力减少20%,发射筒摆动幅度范围缩减12.1%。In order to explore the stability of special vehicle body under launch load,the finite element modeling and simulation method based on HyperMesh-LS-DYNA was used.Taking a special vehicle as the research object,the suspension and other related flexible components were constructed in the vehicle numerical simulation model,and the stability of the car body under the launch load was analyzed.It was found that the launch load was not uniformly dispersed to each supporting structure.In addition,the contact pressure between the tire and the ground corresponding to the launch base and g-h axes was larger,and the swing amplitude of the launch tube was larger. Based on the above results, two optimization schemes were proposed to adjustthe stiffness and damping coefficient of the branch structure and increase the additional supporting structure,in order to reduce the contact pressure between the vehicle and the ground and the longitudinal swing amplitudeof the car body, and the simulation verification was carried out. The results show that the number and positionof auxiliary supports have a great influence on the stability of the car body, and the more close to the base andthe more the number is, the better the stability of the car body is, in which a pair of additional supporting legsis added between the axis of g and h, and the base contact force is reduced by 16%. A pair of additionalsupporting legs are added between the axis of b and c, and are added between the axis of g and h at the sametime, the base contact pressure is reduced by 20%, and the swing range of the launcher is reduced by 12. 1%.

关 键 词：车体稳定性 发射载荷 特种车辆 有限元模型 多轴车辆 

分 类 号：TJ812.6[兵器科学与技术—武器系统与运用工程]