摘要
单轨火箭橇靴-轨的冲击响应是影响其运动过程中系统稳定性的主要问题。本文以单轨火箭橇为研究对象,采用有限元结构动力学仿真分析方法建立了非线性火箭橇-轨道耦合动力学模型;对比分析了理想平直轨和不平顺轨两种轨道模型条件下滑靴、卡环、发动机的振动量变化,并进行了火箭橇的试验验证和数据对比。结果表明:不平顺轨道对火箭橇靴-轨冲击响应振动加速度均方根值的影响大于理想平直轨道,滑靴处二者最大偏差为3~5倍,且随机振动特性显著;最大速度时刻的靴-轨冲击预测结果与实测值在侧向和竖向振动趋势上具有很好的一致性。研究结果为火箭橇结构优化设计及稳定性分析提供了理论依据和技术保障。
The shock response of the monorail rocket sled slipper-rail is a major problem affecting the stability of the system during movement. In this paper, the monorail rocket sled is taken as the research object, and the finite element structure dynamics simulation method is used to establish the nonlinear rocket sled-track coupling model. The vibration changes of slippers and clasps and engine casing of ideal straight track and uneven straight track models are compared and analyzed, and the rocket sled test verification and data comparison are carried out. The results show that:(1) The influence of uneven straight orbit on the slipper-rail impact RMS value of the vibration response is greater than that of the ideal straight orbit, and the maximum deviation at the slipper is 3 ~ 5 times, and the random vibration characteristic is remarkable.(2) The simulated results of slipper-rail impact at the max velocity are in good agreement with the measured values in the lateral and vertical vibration trend. The research results provide theoretical basis and technical support for structural design and stability analysis of rocket sled.
作者
范坤
杨珍
薛晓敏
夏洪利
Fan Kun;Yang Zhen;Xue Xiaomin;Xia Hongli(Test and Measuring Academy of China Ordnance Industries,714200,Huayin,China;Department of Civil Engineering,Xi'an Jiaotong University,710049,Xi'an,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2020年第5期1887-1893,I0003,共8页
Chinese Journal of Applied Mechanics
基金
国防基础科研计划资助(JCKY2016208A006)。
关键词
火箭橇
振动特性
橇-轨耦合
靴-轨冲击响应
动态响应
rocket sled
vibration performance
coupled sled-track
impact response of Slipper-Rail
dynamic response
