基于线刚度比的提梁机结构动力特性分析  

Dynamic Characteristic Analysis of Girder Hoisting Machine Structure Based on Linear Stiffness Ratio

作　　者：陈士通[1] 孙志星[1] 李向东[2] 王海林[1] 

机构地区：[1]石家庄铁道大学,石家庄050043 [2]江苏省特种设备安全监督检验研究院,南京21003

出　　处：《铁道工程学报》2014年第11期77-81,97,共6页Journal of Railway Engineering Society

基　　金：铁道部科技研究开发计划项目(2008G008-A);国家质检总局科技项目(2007QK125);河北省教育厅资助科研项目(QN2014173)

摘　　要：研究目的:针对大吨位提梁机经常需要根据施工现场情况进行改造,而在常规改造过程中容易忽略结构动力特性变化,进而引起不必要的工程事故这一问题,以提梁机支腿与主梁线刚度比为主要研究参数,研究支腿高度变化对动力特性的影响规律,以便能够给提梁机改造和设计提供参考。研究结论:(1)提梁机纵向和横向动力性能对提梁机支腿与主梁线刚度比的变化非常敏感,线刚度比的改变会导致振动频率和振动模态发生较大变化;(2)提梁机竖向动力性能对提梁机支腿与主梁线刚度比变化的敏感程度较低,但对竖向荷载变化则非常敏感;(3)线刚度比对起升动载系数影响较为明显,需仔细研究动载系数变化,以保证提梁机运行安全;(4)本研究根据实际工程进行,成果可用于提梁机改造和新产品设计开发。Research purposes： Large -tonnage girder hoisting machine otten need to lae transtormeo to meet me engineering environment. The dynamic characteristic change is easily ignored in the conventional transformation, resulting in unnecessary engineering accident. Therefore, based on the linear stiffness ratio of girder hoisting machine leg and main girder line, the influence law of the leg height on dynamic characteristics was systematically analyzed so as to offer the reference for transform and design of the girder hoisting machine. Research conclusions： （ 1 ） The longitudinal and lateral dynamic characteristics are sensitive to the change of linear stiffness ratio of girder hoisting machine leg and main girder line, the change of the linear stiffness ratio will cause the significant changes of the vibration frequency and vibration model. sensitive to the change of linear stiffness ratio, but are sensitive to （2） the The vertical dynamic characteristics are not change of vertical load. （3） To ensure the operation safety of the girder hoisting machine, the dynamic coefficient of lifting must be researched in the process of the transformation. （4） According to the practical engineering for analysis, the research results is suitable for the girder hoisting machine transformation and new equipment design and development.

关 键 词：提梁机 线刚度比 动力特性 动力响应 模态分析 

分 类 号：U215.6[交通运输工程—道路与铁道工程] TH213.5[机械工程—机械制造及自动化]