基于模态追踪技术的微硬盘驱动臂频率拓扑优化  

Topological optimization of micro hard disk drive suspension for natural frequencies based on modal assurance criteria

作　　者：江旭东[1] 滕晓艳[2] 史冬岩[2] 

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080 [2]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001

出　　处：《机械设计》2017年第6期36-40,共5页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51505096);黑龙江省自然科学基金资助项目(E2015026);中央高校基本科研业务费专项资金资助项目(HEUCF150701)

摘　　要：以微硬盘驱动臂的1阶扭转、纵向弯曲和横向弯曲振动特征频率最大化为目标,基于各向同性惩罚材料插值模型,建立了驱动臂结构动力学特性的拓扑优化模型。引入模态跟踪技术避免了模态振型的变化,利用灵敏度滤波技术抑制了棋盘格效应和网格依赖性等数值奇异性问题,构建了基于模态灵敏度排序的材料更新算法,提出了针对特定振型频率最大化问题的结构动力特性拓扑优化方法。数值研究结果表明,基于模态跟踪技术的结构频率拓扑优化方法,显著提高了微硬盘驱动臂结构的特征频率,为有效改善微硬盘驱动臂的动态性能提供了一种新的途径。On the basis of solid isotropic material with penalization（SIMP） model,the topological optimization model of the micro hard disk drive suspension for the dynamic characteristics is established to maximize its fundamental torsional,longitudinal and lateral bending natural frequency respectively.A modal assurance criterion is exploited to effectively avoid mode number switching.The sensitivity filter scheme is developed to successful address numerical singularity problems of mesh-independence and checkerboard.Subsequently the material updating algorithm is developed which based on modal sensitivity sequence.As a result the topological optimization of vibrating structures is proposed for maximizing the fundamental frequencies of specific modes.Numerical analysis results show that the topological frequency optimization method followed by modal assurance criterion is efficient to improve the natural frequency of the micro hard disk drive suspension.The proposed optical design method will give another new approach to improve the dynamical performance of the micro hard disk drive suspension.

关 键 词：拓扑优化 固有频率 模态追踪 微硬盘驱动臂 

分 类 号：O342[理学—固体力学]