摘要
研究了在满足频率、强度、刚度约束的前提下,通过尺寸优化实现中国大学生方程式大赛(FSC)赛车车架的轻量化设计.首先,根据FSC规则要求建立车架的有限元模型.其次,设置5种静态特性分析工况、5个重要部位的刚度分析工况与前六阶自由模态分析工况对车架结构进行性能分析,构建以质量响应最小为优化目标,以材料的许用应力、重要部位的许用刚度和发动机的激振频率为约束条件,以车架管厚为设计变量的尺寸优化模型.最后,通过序列线性规划对非线性优化模型进行近似求解,取得了良好的轻量化效果:FSC赛车车架降重5.34kg,减重15.7%.
To realize the lightweight design of the Formula Student China's(FSC)frame structure,the geometry optimization is performed with the concern of modal,strength and stiffness constraints.Firstly,a finite element model of the frame is built based on the FSC rules.Subsequently,five types of static characteristic analysis conditions,five types of stiffness analysis conditions of important parts and six free modal analysis conditions are conducted for performance analysis of the frame structure.The size optimization model is set up with minimizing mass as the objective,the allowable stress of materials,allowable stiffness of important parts and excitation modal of the engine as the constraints,and the frame tube thickness as the design variable.Finally,approximate solution is acquired by sequential linear programming with nonlinear optimization model.A good lightweight result is obtained.The weight of the FSC frame decreases by 5.34 kg with a reduction rate of 15.7%.
作者
马芳武
陈实现
赵花垒
左文杰
路洪洲
吴量
MA Fangwu;CHEN Shixian;ZHAO Hualei;ZUO Wenjie;LU Hongzhou;WU Liang(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,China;CITIC-CBMM Microalloying Technology Center,Beijing 100004,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第4期18-25,共8页
Journal of Hunan University:Natural Sciences
基金
国家重点研发计划资助项目(2016YFB0101601)
吉林省省校共建计划专项项目(SXGJQY2017-7)~~
关键词
FSC车架
轻量化设计
序列线性规划
灵敏度
FSC frame structure
lightweight
sequential linear programming
sensitivity analysis
