轮胎试验台转鼓结构的优化设计  

Optimized Design for Drum Structure of Tire Test Bed

作　　者：李世武[1] 田晶晶[1] 孙文财[1] 王建武[1] 汪海正[1] 

机构地区：[1]吉林大学交通学院,吉林长春130022

出　　处：《华南理工大学学报（自然科学版）》2011年第11期144-148,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家"863"计划项目(2009AA11Z215);国家自然科学基金资助项目(50978116)

摘　　要：为避免试验过程中转鼓在外界激励下发生共振,首先基于拓扑优化原理,以单元密度作为设计变量、体积缩减50%为约束条件、一阶固有频率为设计目标,对"工"字型转鼓的结构进行拓扑优化计算,得出转鼓的伪密度分布图;然后基于转鼓拓扑优化分析结果,改进转鼓的"工"字型结构,并对转鼓的结构尺寸进行50次迭代优化.在转鼓的一阶固有频率高于60Hz的前提下,取一阶固有频率与总质量比值最大(0.0539)时的结构尺寸为最优解.优化结果表明:改进后的转鼓第一阶固有频率为64.384Hz,较改进前提高了21.972 Hz;转鼓总质量降低了69.95 kg.In order to avoid the resonance of drum under external excitation during tire tests,first,the topological optimization analysis of 工-shaped drum was carried out,with the element density as the design variable,the volume reduction of 50% as the constraint and with the first-order natural frequency as the objective function.Next,the pseudo-density distribution of the drum was obtained,and the 工-shaped structure of drum was modified according to the analysis results.Then,the structure size of the modified drum was optimized via 50 iterative calculations.Finally,on the premise that the first-order natural frequency was more than 60 Hz,the structure size of drum was taken as the optimum when the ratio of the first-order natural frequency to the total mass reached the maximum 0.053 9.Optimization results show the total mass of the modified drum decreases by 69.95 kg and first-order natural frequency reaches 64.384 Hz,which is 21.972 Hz higher than that of the original drum.

关 键 词：轮胎试验台 转鼓 模态分析 拓扑优化 

分 类 号：U492.8[交通运输工程—交通运输规划与管理]