嵌入式轨道槽内结构刚度匹配及拓扑优化研究  

Stiffness Matching and Topology Optimization of Embedded Track Groove Structures

作　　者：康晨曦 雷晓燕[1] 刘庆杰[1] 冯青松[1] 罗信伟[2] KANG Chenxi;LEI Xiaoyan;LIU Qingjie;FENG Qingsong;LUO Xinwei(Railway Noise and Vibration Environment Engineering Research Center of the Ministry of Education,East China Jiaotong University,Nanchang 330013,China;Guangzhou Metro Design Research Institute Co.,Ltd.,Guangzhou 510030,China)

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心,南昌330013 [2]广州地铁设计研究院有限公司,广州510030

出　　处：《噪声与振动控制》2020年第2期133-139,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51868024)。

摘　　要：双层嵌入式轨道不但具有单层嵌入式轨道的优点,还能更好适应轨道结构在不同方向上的力学性能要求。但相对于单层嵌入式轨道,双层嵌入式轨道的结构和力学性能都发生改变,应重新对填充材料和槽内结构进行优化设计。基于规定的轨道刚度和减少填充材料使用的要求,通过响应面法和拓扑优化对双层嵌入式轨道进行优化设计。研究结果表明:上层与下层填充材料的弹性模量分别选为20 MPa和1.6 MPa可以很好匹配适宜的轨道刚度。在保证轨道力学性能的前提下,建议采用减少30%填充材料的拓扑优化截面形式,可以尽可能节省成本。The double-layer embedded track not only has all the advantages that the single-layer embedded track has,but also can well adapt to the mechanical properties of the track structure in different directions.However,compared with the single-layer embedded track,the structure and mechanical properties of the double-layer embedded track have changed.So,the filling material and the groove structure need to be re-optimized.In this paper,based on the specified track stiffness and the requirement of reducing the use of filling materials,the double-layer embedded track is designed by means of the response surface method and topology optimization.The results show that the 20 MPa and 1.6 MPa of the elastic modulus of the upper and lower filling materials can match the appropriate track stiffness well.On the premise of ensuring the track mechanical properties,it is suggested to adopt the topological optimization section,which can reduce the filling material by 30%and save the cost of the double-layer embedded track as much as possible.

关 键 词：振动与波 嵌入式轨道 结构优化 刚度匹配 响应面法 拓扑优化 

分 类 号：U213.2[交通运输工程—道路与铁道工程]