600 kN超大推力电磁振动试验台动圈结构的模态分析与优化

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英文篇名：Modal Analysis and Optimization of the Moving Coil in a 600 kN Electromagnetic Vibration Shaker 作者：仝宁可 ; 杜环宇 ; 李鸿光 ; 刘营 ; 孟光 英文作者：TONG Ningke;DU Huanyu;LI Hongguang;LIU Ying;MENG Guang;Suzhou Dongling Vibration Testing Instrument Co., Ltd.;The State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University; 关键词：振动与波 ; 振动试验台 ; 动圈结构 ; 有限元分析 ; 模态分析 ; 优化设计 英文关键词：vibration and wave;;vibration shaker;;moving coil;;finite element analysis;;modal analysis;;optimization 中文刊名：ZSZK 英文刊名：Noise and Vibration Control 机构：苏州东菱振动试验仪器有限公司;上海交通大学机械系统与振动国家重点实验室; 出版日期：2019-06-18 出版单位：噪声与振动控制 年：2019 期：v.39 基金：国家自然科学基金资助项目(11427801) 语种：中文; 页：ZSZK201903006 页数：5 CN：03 ISSN：31-1346/TB 分类号：30-34

摘要

以600 kN超大推力电磁振动试验台的动圈结构为研究对象,采用有限元分析方法计算其振型及模态频率,尤其关注其1阶轴向模态并以之为指标进行结构优化。根据动圈实际工况,建立加筋动圈模型并定义动圈的支承约束刚度,完成动圈结构的模态分析。定义有效质量权重(Efficient Mass Percentage,EMP)概念,并用于提取1阶轴向共振频率,结果通过实验验证。最终利用动圈缩减模型消除模态分析过程中出现的对称模态和局部模态,通过各结构参数对1阶轴向共振频率的灵敏度分析,找出影响频率提高的关键部分。通过优化,动圈结构的1阶轴向共振频率有显著提升。
        The structure of moving coil in a 600 kN super-thrust electromagnetic vibration shaker is studied. Finite element method is used to calculate the vibration modes and modal frequencies, especially the first-order axial modal. With the first-order axial frequency as a target, the moving coil structure is optimized. According to actual working conditions of the moving coil, the dynamic model is established and the constraint stiffness of support is defined. The modal analysis of the moving coil structure is completed. The EMP(Efficient Mass Percentage) is defined and proved successful in extracting the first-order axial frequency. Subsequently, the symmetrical modes and local modes among the modal analysis process are eliminated by the moving coil reduction model. The result is verified by the experiment. According to the sensitivity analysis of the first-order axial resonance frequency, the key substructure to increase the moving coil structure's first-order axial frequency is found. By optimization, the first-order axial resonance frequency of the moving coil is obviously raised.

引文

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