Modal Frequency Optimization of Aluminum Alloy Extrusions Coupled with Acoustic Cavity
The aluminum alloy extrusions are widely used in high speed rail vehicle, the optimization of its coupled modal frequency with the acoustic cavity is significance for reducing vibration and noise . The finite element model of aluminum alloy extrusions coupled with the acoustic cavity is built, the modal frequency is calculated; the structure parameters of extrusions and acoustic cavity are used as design variables, the extrusions weight and acoustic volume are used as constrain function, then the optimization model is formulated, the zero-order optimization method is applied to optimize the design variables. A addition of 18.84Hz is achieved for the first coupled modal frequency, and a addition of 29.38Hz is achieved for the difference of between first coupled modal frequency and the second coupled modal frequency. The results show that the coupled modal frequency can be changed in reason by optimization.
Aluminum alloy extrusions Acoustic cavity Coupled modal frequency Optimization Finite element method(FEM)
Jun Zhang XiaoZhen Mi WenZhong Zhao WeiYing Zhang
College of Traffic and Transportation Engineering, Dalian JiaoTong University, Dalian 116028, China College of Marine and Engineering, Dalian Fisheries University, Dalian 116023, China
国际会议
The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)
无锡
英文
313-316
2010-06-04(万方平台首次上网日期,不代表论文的发表时间)