摘要
针对某244S摩托车排气消声器,采用有限元法建立了该消声器的声场模型和流场模型,利用SYSNOISE软件对该消声器进行了三维声学仿真,在声场仿真基础上提出对原消声器的改进方案,优化了原消声器内部结构。通过对改进后的消声器进行仿真与台架试验对比,改进后的结构比原消声器在中、高频的消声能力有显著的改善,仿真和试验结果吻合较好,同时流场仿真结果显示,改进后消声器功率损失变化不大,表明对原消声器结构的改进是有效的。
Aiming at the exhaust muffler of a 244S motorcar, the acoustics field model and the flow field model are established by adopting Finite Element Method. The 3-D acoustic simulation is carried out by using software SYSNOISE, and an improvement scheme with optimized inner structure of the muffler is proposed based on the simulation. The acoustic simulation result and the bench test result of the improved muffler show that the muffling ability in middle and high-frequency of the improved structure is obviously stronger than the original structure, and the simulation result coincides well with the bench test result. Meanwhile, the flow field simulation result shows the power loss of the engine has little change, which means that the structure improvement of the original muffler is effective.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第7期7-11,共5页
Journal of Chongqing University
基金
重庆市自然科学基金重点资助项目(CSTC
2008BA6025)
教育部重点项目(108108)
教育部重点实验室开放基金资助项目(2009KLMT05)
关键词
消声器
有限元法
声场
流场
结构改进
muffler
finite element method
acoustics field
flow field
structure improvement
