双轨火箭橇轨道系统模态及振动特性研究  

Study on modal and vibration characteristics of the dual-track rocket sled system

作　　者：孙义 张琪 赵良玉[1] SUN Yi;ZHANG Qi;ZHAO Liangyu(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]北华航天工业学院,河北廊坊065000

出　　处：《兵器装备工程学报》2023年第5期165-171,共7页Journal of Ordnance Equipment Engineering

基　　金：航空科学基金项目(201929072002)。

摘　　要：在火箭橇滑车高速运行过程中,其与滑轨之间的碰撞及耦合作用可能会引起共振并导致轨道系统受损。为避免该现象的发生,建立了典型双轨火箭橇轨道-承轨梁耦合模型,利用有限单元法对其进行模态分析和静力学分析。结果表明,建立的耦合模型准确可信,承轨梁能够有效减小滑轨垂向振动的振幅,降低两条滑轨之间的相互影响,并能大幅降低系统的固有频率;承轨梁还可以有效降低激励点处的振幅,对滑车运行等因素造成的滑轨振动具有较好抑制作用。During the high-speed operation of the rocket sled system of a train,the collision and coupling between the sled and the train track may cause resonance and damage to the system.To avoid this phenomenon,this paper establishes a coupled model of typical double sled track-bearing beam,and uses the finite element method for modal analysis and static analysis.The results show that the established coupling model is accurate and reliable,and the bearing beam can effectively reduce the vertical vibration amplitude of the sled,which reduces the interaction between the two sleds and greatly reduces the natural frequency of the system.At the same time,the bearing beam can also effectively reduce the amplitude at the excitation point and has a good inhibitory effect on the sled vibration caused by factors such as the operation of the train.

关 键 词：火箭橇 有限元 模态分析 滑轨 承轨梁 

分 类 号：TJ06[兵器科学与技术—兵器发射理论与技术]