摘要
针对火箭滑橇试验平台的恶劣工况,文中从多体系统有限元理论的角度讨论了火箭滑橇的仿真模型,分析了滑橇运行过程中的恶劣工况及边界条件的建立方法,利用联合仿真的手段对所建动力学模型及边界条件进行了仿真验证分析.仿真结果表明:当滑橇运行速度在300m·s^(-1)时,橇体刚度完全满足要求;速度增大到500 m·s^(-1)时,橇体的三向过载增大显著.仿真结果与实飞试验结论基本一致,建立的多体系统有限元模型及其边界条件的模拟方法合理,多体系统有限元动力学分析方法可行.
In view of the toughest working conditions of the rocket sled test platform, this paper discusses the simulation model of a rocket sled from the perspective of the finite element theory of the multibody system,analyzes the method for establishing toughest boundary conditions during the sled＇s sliding,and uses the method of joint simulation to verify the accuracy and rationality of the dynamic model and the boundary condition analysis. The simulation results suggest that at the running speed of 300 m. s 1,the stiffness of the sled meets the requirements completely and that at 500 m ~ s 1,the rocket sled＇s three accelerations increase significantly. The results in the simulation are basically in agreement with the measured data. It is concluded that the finite element dynamic analysis method of the multi-body system is workable.
作者
张建华
王娟
祝强
ZHANG Jianhua;WANG Juan;ZHU Qiang(School of Science,Chang＇ an University,Xi＇ an 710064,China;School of Mechatronic Engineering,Xi＇ an Technological University,Xi＇ an 710021,China)
出处
《西安工业大学学报》
CAS
2018年第4期377-383,共7页
Journal of Xi’an Technological University
基金
陕西省自然科学基金(2014JM7297)
关键词
多体系统有限元
火箭滑橇
联合仿真
轨道不平度
multibody system finite element method
rocket sled
united simulation
railway unevenness
