An efficient optimal design methodology for abnormal noise control of automobile transmission in the neutral idle condition

作者：Li Yongxiang^*; Jin Lihong; Shen Wenquan; Nan Liwen; Zhao Youjia

来源：Journal of Vibroengineering, 2014, 16(1): 351-359.

• transmission
• mesh frequency
• idle speed
• neutral position
• vibration and noise

The modal analysis of the automobile transmission housing assembly is formulated using 3D graphics software Pro/E together with Finite Element Method in order to reduce the noise and vibration by accurately identifying the noise source of the transmission in the neutral idle condition. Besides, the calculation of meshing frequency of gear pair is conducted. After comparing model analysis results with the calculation results, we can intuitively analysis the dynamic characteristics of the transmission housing assembly and find out sensitive parts of the housing vibration. In order to enhance the structural stiffness of the transmission housing assembly and allow intentionally the natural frequency of the transmission to avoid the gear meshing frequency, we increase the thickness of thin plate or add the strengthening rib on the weak parts of the transmission housing assembly. The results of the above modified modal reanalysis show that low mode frequencies of the transmission housing assembly are greatly improved after optimization, and avoid the gear meshing excitation frequency effectively. The probability of resonance for the transmission housing assembly in use will be greatly reduced, which can well achieve the purpose of enhancing the dynamic characteristics of the transmission housing assembly.

• 出版日期2014-2
• 单位浙江师范大学