有限元-无限元法在城市轨道交通箱梁结构噪声仿真分析中的应用*
吕国生1奚绍良2罗雁云1张天琦1吴尚1
Application of FEM-IFEM in Structure-borne Noise of Urban Rail Transit Box-girders Simulation Analysis
LYU GuoshengXI ShaoliangLUO YanyunZHANG TianqiWU Shang
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作者信息:1.同济大学铁道与城市轨道交通研究院，201804，上海；
2.中国铁路上海局集团有限公司徐州工务段，221000，徐州
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Affiliation:Institute of Rail Transit, Tongji University, 201804, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.11.016
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中图分类号/CLCN:U441+.3;U448.21+3
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栏目/Col:研究报告
摘要:
介绍了有限元-无限元及边界元法的基本理论。针对城市轨道交通桥梁结构噪声计算问题，以单箱梁为算例，在Abaqus软件中建立车辆-轨道-桥梁振动耦合有限元模型,得到了箱梁振动仿真结果；在Abaqus软件中使用有限元-无限元法建立桥梁辐射结构噪声仿真模型；在Virtual.lab软件中使用边界元法建立边界元仿真模型。对箱梁顶板、底板、腹板和翼板近场处噪声仿真结果进行分析及对比。结果表明，两种算法的噪声仿真结果和箱梁振动仿真结果在箱梁顶板、底板、腹板和翼板处的频谱曲线趋势吻合较好，噪声仿真结果在 1~200 Hz频率范围内的总声压级相差不大。说明有限元-无限元法噪声仿真结果可靠，可应用于城市轨道交通桥梁噪声问题的研究。
Abstracts:
The basic theories of finite element-infinite element and boundary element method are introduced. Aiming at the calculation of urban rail transit bridge structure-borne noise, taking a single box girder as an example, the vehicle-track-bridge vibration coupling finite element model is established in the Abaqus software, and the box-girder vibration simulation results are obtained; the finite element-infinite element method is used in the Abaqus software to establish a simulation model of bridge radiation structure noise; boundary element method was used in Virtual.lab software to establish a boundary element simulation model. The noise simulation results of the box-girder top, bottom, web and wing panels in the near field are analyzed and compared. The results show that the noise simulation results of the two algorithms and the box-girder vibration simulation results are in good agreement with the spectrum curve trends of the box-girder top, bottom, web and wing plates. The noise simulation results are in the frequency range of 1~200 Hz, with little difference in the total sound pressure level. It is shown that the finite element-infinite element method noise simulation results are reliable and can be applied to the research of urban rail transit bridge noise problems.
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