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高速钢丝编织机转子疲劳分析及多目标优化设计

发表时间:2019-10-31  浏览量:157  下载量:11
全部作者: 梁瀚文,张艳
作者单位: 东南大学机械工程学院
摘 要: 为研究高速钢丝编织机转子系统的结构动力学响应及疲劳断裂情况,优化产品性能,基于ANSYS Workbench平台,对转子进行瞬态动力学分析,并基于响应面法进行多目标优化设计。1)通过瞬态动力学分析分别得到转子的主轴、光杆定位块螺栓及上拨叉在时变循环载荷作用下的应力谱,并导入nCode DesignLife模块中,基于线性疲劳累积损伤准则进行疲劳寿命评估。2)以降低最大等效应力值为优化目标,基于响应面法对上述三个关键部件进行多目标优化设计,优化零部件的尺寸。结果表明,基于响应面法可以快速得到转子结构优化设计的最优解,缓解应力集中,增加产品的工作寿命,并指导后续的优化设计。
关 键 词: 机械设计;多目标优化设计;瞬态动力学;钢丝编织机;疲劳寿命;响应面法
Title: Fatigue analysis and multi-objective optimization design of rotor of high speed steel wire braiding machine
Author: LIANG Hanwen, ZHANG Yan
Organization: School of Mechanical Engineering, Southeast University
Abstract: In order to study the structural dynamic response and fatigue fracture of the rotor system of high speed steel wire braiding machine and to optimize the product performance, the transient dynamics analysis of the rotor was carried out based on the ANSYS Workbench platform, and the multi-objective optimization design based on the response surface method was carried out. First, the stress spectra of the rotor’s main shaft, the polished rod positioning block bolts and the upper fork under the time-varying cyclic load are obtained through the transient dynamics analysis and imported into the nCode DesignLife module for fatigue life evaluation based on linear fatigue cumulative damage criterion. Second, to reduce the maximum equivalent stress value is the objective of optimization, the multi-objective optimization design of the above three key components is based on the response surface method, and the size of components can be optimized. The results show that the optimal solution of the rotor structure optimization design can be quickly obtained based on the response surface method, the stress concentration can be alleviated, the working life of the product can be increased, and the subsequent optimization design can be guided.
Key words: mechanical design; multi-objective optimization design; transient dynamics; steel wire braiding machine; fatigue life; response surface method
发表期数: 2019年10月第5期
引用格式: 梁瀚文,张艳. 高速钢丝编织机转子疲劳分析及多目标优化设计[J]. 中国科技论文在线精品论文,2019,12(5):726-734.
 
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