傳動系統殼體輕量化

Analysis of Lightweight Housing in Transmission System

黃礪德 ； 陳柏彣

《機械工業雜誌》 439期 (2019/10) Pp. 48-55

摘要

以電動車用齒輪箱為研究對象，針對其殼體結構進行輕量化設計。使用有限元素軟體建立傳動系統模型，並透過非參數最佳化分析軟體進行拓樸最佳化設計。本文藉由文獻回顧探討結構輕量化設計與可能發生的共振問題，建立一套完整的設計流程。本流程整合結構靜態與動態分析，以及拓樸最佳化設計方法，使結構同時滿足強度、剛性及自然頻率的目標需求，以改善電動車傳動系統結構因輕量化可能引起的強度及振動問題。針對齒輪箱殼體厚度，加強肋及局部結構進行優化，改進後殼體質量由11.79公斤減為9.83公斤，減輕17%；基頻提高27%、最大應力下降10%，達到輕量化和強度提高的目標。

關鍵字

齒輪箱殼體 ； 拓撲優化 ； 動態分析

並列摘要

Weight reduction of gearbox is an effective approach for electric vehicles to extend their driving range. However, weight reduction will also result in the reduction of stiffness, which introduces possible resonance problems. It will reduce the transmission efficiency, life of parts and passenger comfort. Therefore, this article brings up a new method, which optimizes the structure of transmission in electric vehicles by using finite element analysis software to build the electric vehicle transmission model. With the topology optimization, this method could achieve design requirements in strength, stiffness, and natural frequency simultaneously, as well as could avoid resonance and improve transmission efficiency. The weight of transmission housing has been reduced from 11.79 kg to 9.83 kg, a reduction of approximately 17 %. However, its fundamental frequency is increased by 27 %, with maximum stress decreased by 10 %. The goal of lightweight and strength improvement have been achieved.

並列關鍵字

Gearbox housing ； Topology optimization method ； Dynamic analysis