Finite Element Modal Analysis of Overhead Traveling Crane's Structure
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摘要: 桥式起重机在工作时由于振动或冲击会引起共振、疲劳破坏等现象,对机械装备寿命影响极大。针对设计中的桥式起重机结构进行有限元模态分析,得出了各阶模态下主梁的固有频率和固有振型,从动态刚性对该起重机的设计进行评价,利用分析所得到的参数,修改有限元模型使这些固有频率离开外激振力的频率可以避免发生共振。Abstract: An overhead traveling crane's vibration causes resonance and fatigue damage,thus affecting the life of machinery equipment.This paper finds out the causes of the vibration and conducts the finite element(FE) modal analysis of the double-girder structure of the overhead traveling crane,obtaining the inherent frequencies and vibration modes of the girder under the modals of various orders.With the parameters obtained through the FE modal analysis,the paper modifies the FE model of the girder so that its inherent frequencies can be far away from the frequency of externally-excited vibration,thus avoiding the resonance.It provides a theoretical basis for the girder's dynamics modification.
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Key words:
- finite element method /
- modal analysis /
- overhead traveling crane
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[1] 王孚懋, 任勇生．机械振动与噪声分析基础[M]. 国防工业出版社, 2006 [2] 兰凤崇, 陈吉清等．承载式车身结构的强度刚度及模态的有限元分析[J]. 机械科学与技术, 2006, 25(3):367～370 [3] 徐格宁．机械装备金属结构设计[M]. 机械工业出版社, 2009 [4] 塔娜, 饶柱石等．岸桥起重机有限元建模与动态响应分析[J].噪声与振动控制, 2008, 28(4):6～8 [5] 陈道礼．桥式起重机动态刚性的有限元分析[J]. 起重运输机械, 2005, (5):13～15 [6] 黄涛, 王涛等．桥式起重机三维有限元分析[J]. 武汉科技大学学报, 2009, 32(6):623～626 [7] 王平等．有限元分析建模知识表示及重用知识研究[J]. 机械科学与技术, 2005, 24(11):1316～1319 -
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