汾西TFC6905-3型发电机的机体模态分析

卢五弟; 林建中; 陈云

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DOI:10.3969/j.issn.1006-4729.2014.03.012

Journal of ShangHai University of Electric Power :2014,30(3):248-251

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汾西TFC6905-3型发电机的机体模态分析

卢五弟^1,2, 林建中¹, 陈云³

(1.上海理工大学;2.瓦锡兰中国有限公司;3.上海安声船舶技术有限公司)

Modal Analysis of Fenxi TFC6905-3 Generator Frame

LU Wudi^1,2, LIN Jianzhong¹, CHEN Yun³

(1.University of Shanghai for Science and Technology, Shanghai 200090, China;2.Wartsila China Co., Ltd, Shanghai 201201, China;3.Shanghai NAVCE Marine Technology Co., Ltd., Shanghai 200333, China)

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Received:March 10, 2014

中文摘要: 利用有限单元法对发电机机体进行建模与模态分析,分别计算在自由无约束状态下和约束状态下的前15阶模态的固有频率和振型.通过动态系统建模与分析,得到了结构模态参数,通过模态实验验证了自由状态下的模态分析法更具合理性.另外,通过模态分析可知,结构的固有频率不仅和材料属性,如重量、刚度、阻尼等有关,同时还与边界约束条件有关.

中文关键词: 模态分析发电机机体固有频率振型

Abstract:By using FEM method to create the modelling and to perform modal analysis for generator frame, the lowest natural frequencies and mode shapes for the first 15 th modes are calculated under Free-Free status and constrained all DOF status respectively. By experimental modal analysis, verifying the Free-Free status analysis is a more reasonable method for modal analysis. In addition, the natural frequency and mode shape not only relates to material properties(mass, stiffness, damping properties), but also relates to boundary condition(mounting).

keywords: modal analysis generator frame natural frequency mode shape

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Author Name	Affiliation	E-mail
LU Wudi	University of Shanghai for Science and Technology, Shanghai 200090, China Wartsila China Co., Ltd, Shanghai 201201, China	sunnyl02720@163.com
LIN Jianzhong	University of Shanghai for Science and Technology, Shanghai 200090, China
CHEN Yun	Shanghai NAVCE Marine Technology Co., Ltd., Shanghai 200333, China