基于熵权-TOPSIS的CFRP电池箱体铺层优化设计  

Lager optimization design of CFRP battery-pack enclosure using entropy-based TOPSIS approach

作　　者：苏海亮 马莲花 展新 覃记荣 张彦会[1] SU Hailiang;MA Lianhua;ZHAN Xin;QIN Jirong;ZHANG Yanhui(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Commercial Vehicle Technology Center,Dongfeng Liuzhou Automobile Co.,Ltd.,Liuzhou 545005,China)

机构地区：[1]广西科技大学机械与汽车工程学院,柳州545006 [2]华南理工大学机械与汽车工程学院,广州510641 [3]东风柳州汽车有限公司商用车技术中心,柳州545005

出　　处：《复合材料科学与工程》2024年第12期62-68,共7页Composites Science and Engineering

基　　金：广西科技人才专项项目(AD21220145,AD23026317);广西科技大学博士基金项目(20Z40);广西科技大学硕士研究生创新项目(GKYC202315)。

摘　　要：为实现新能源汽车电池箱的轻量化设计,针对某款新能源汽车电池箱体,采用轻质高强的碳纤维复合材料(CFRP)进行结构材料的等效替换,并基于正交试验表采用熵权-TOPSIS法进行多目标铺层优化设计。本文利用Digimat商用软件对CFRP层合板进行相关力学性能的预测,并通过力学性能测试验证其正确性;基于层合板设计准则和等刚度设计原理,确定了CFRP电池箱的初步结构方案;最后以质量、变形量最小化和一阶模态最大化为目标,对层合板进行铺层优化,以获取最佳性能的CFRP电池箱体结构。研究结果表明,优化后的CFRP电池箱壳体较原金属结构减轻了46.74%,同时电池箱体结构综合性能也得到了提升。In order to achieve lightweight design for a new energy vehicle battery box,a lightweight and highstrength carbon fiber reinforced plastic(CFRP)was used to replace the structural material.The entropy-based TOPSIS method based on orthogonal test table was utilized for multi-objective layup optimization design.The mechanical properties of CFRP laminates were predicted using the Digimat commercial software,and their correctness was verified through mechanical performance tests.Based on laminate design criteria and equal stiffness design principles,the preliminary structural plan for the CFRP battery box was determined.Finally,the laminate layering was optimized with the goal of minimizing deformation and maximizing the first-order mode,resulting in the best performance CFRP battery box structure.The research findings indicate that the optimized CFRP battery box shell is 46.74%lighter than the original metal structure,and the overall performance of the battery box structure is also improved.

关 键 词：电池箱体 碳纤维复合材料 熵权TOPSIS 轻量化 多目标优化 

分 类 号：TB332[一般工业技术—材料科学与工程]