摘要
基于有限元分析和结构优化技术,研究如何提升重载双浴盆敞车车体的性能指标。依据结构和载荷特点建立敞车车体的有限元分析模型;依据TB/T 3550.2—2019标准和设计任务书对车体进行整体垂向刚度和整体结构模态分析与评价;针对车体第一阶频率偏低问题,通过频率对车体部件灵敏度分析筛选出频率优化设计变量,对车体第一阶频率开展结构优化。优化后车体第一阶频率提高1.3 Hz,质量增大0.49 t;在考核车体强度指标的计算载荷作用下,对车体部件强度进行分析与评价。针对安全系数不满足要求的车体中部下边梁撑杆支座和中梁与浴盆端部区域,开展局部结构补强和最佳刚度匹配及理想补强形状的优化设计。下边梁撑杆支座区域尺寸优化后和中梁与浴盆端部分步拓扑优化后,部件安全系数均满足设计要求。
Based on finite element analysis and structural optimization technology,the improvement of the performance index of heavy haul double bathtub gondola car body is studied.Firstly,the finite element analysis model of gondola car body is established according to the structure and load characteristics.According to TB/T3550.2-2019 standard and design task book,the overall vertical stiffness and overall structural modal analysis and evaluation of the car body are carried out.Aiming at the problem of low first-order frequency of the car body,the frequency optimization design variables are selected through the sensitivity analysis of the frequency to the car body components,and the structural optimization of the first-order frequency of the car body is conducted.After optimization,the first order frequency of the car body is increased by 1.3 Hz,and the mass is increased by O.49 t.Under the calculation load of the strength index of the car body,the strength of the car body parts is analyzed and evaluated.Structural improvement and size optimization are carried out for the support bar support of the lower beam in the middle of the car body.In view of the safety factor does not meet the requirements of the car body in the middle of the lower beam strut support and the middle beam and the bathtub end area,the local structural reinforcement and the best stiffness matching and the optimal design of the ideal reinforcement shape are carried out.After the size optimization of the lower side beam strut support area and the partial step topology optimization of the middle beam and the bathtub end,the safety factor of the components meets the design requirements.
作者
谢素明
杨文博
张强
张露颖
XIE Suming;YANG Wenbo;ZHANG Qiang;ZHANG Luyingg(Zhan Tianyou College(CRRC College),Dalian Jiaotong University,Dalian 116028,China;Dalian Research and Development Center,CRRC Qiqihar Vehicle Co.,Ltd.,Dalian 116052,China)
出处
《大连交通大学学报》
2026年第1期45-52,共8页
Journal of Dalian Jiaotong University
基金
中国中车集团科技研究开发项目(2021CHA014)。
关键词
双浴盆敞车
性能分析
频率优化
尺寸优化
拓扑优化
double bathtub gondola
performance analysis
frequency optimization
size optimization
topology optimization
