基于轻量化设计的电池箱有限元模态分析  

Finite Element Modal Analysis of Battery Box Based on Lightweight Design

作　　者：向瑾 XIANG Jin(Department of Mechanical Engineering,Jinzhong University,Jinzhong 030619,China)

机构地区：[1]晋中学院机械系,山西晋中030619

出　　处：《机械工程与自动化》2022年第1期74-76,共3页Mechanical Engineering & Automation

基　　金：山西省高等学校科技创新项目(2020L0608);晋中学院博士科研经费资助。

摘　　要：电池作为电动汽车动力的主要来源,其安全性至关重要,因此,必须设计相应电池箱保证电池安全性。通过UG软件建立壁厚分别为5 mm和3 mm的电池箱三维模型,并对电池箱结构强度、刚度分别进行有限元分析;在满足强度、刚度要求的基础上,为避免电池箱在汽车驾驶过程中发生共振,对壁厚分别为5 mm和3 mm电池箱进行了模态分析。结果表明:两种厚度的箱体第1阶固有频率均远高于路面不平整引发的振动频率,可避免振动的发生。基于电动汽车结构轻量化设计目标,选择电池箱厚度为3 mm。As the main source of power for electric vehicles, battery safety is of utmost importance. Therefore, a corresponding battery box must be designed to protect battery safety. Firstly, three-dimensional models of the battery box with wall thicknesses of 5 mm and 3 mm were established through UG software, and the finite element analysis was carried out on the strength and stiffness of the battery box structure. On the basis that the structure meets the requirements of strength and rigidity, in order to prevent the battery box from resonating in the driving of the car, the modal analysis of the battery box with wall thickness of 5 mm and 3 mm was carried out. The results show that the first-order natural frequencies of the boxes of the two thicknesses are much higher than the vibration frequency caused by the uneven road surface. In order to avoid the occurrence of vibration, based on the lightweight design goal of the electric vehicle structure, the thickness of the battery box is selected as 3 mm.

关 键 词：轻量化设计 电池箱 有限元分析 模态分析 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]