集装箱起重机的脉动风场仿真及响应分析  

Simulation of Fluctuating Velocity Field and Response Analysis of Container Crane

作　　者：邱惠清[1] 吴志君[1,2] 

机构地区：[1]同济大学机械工程学院,上海201804 [2]中国电子科技集团公司第二十一研究所,上海200233

出　　处：《振动．测试与诊断》2013年第1期44-48,164,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：国家高技术研究发展计划("八六三"计划)资助项目(2009AA043000);上海市科学技术委员会重点科技攻关资助项目(06DZ11202);上海市科委上海工程技术研究中心建设资助项目(08DZ2210103)

摘　　要：基于准定常假定,采用谐波叠加法仿真集装箱起重机的脉动风场并对其进行脉动风载作用下的抖振响应分析。风场仿真结果表明,除自谱的低频误差较大外,风速样本的功率谱密度与目标值完全一致。岸桥前梁端点的位移响应谱表明,低频的脉动风载荷对岸桥的基频模态具有最强的激振效应,且紊流风作用下岸桥前梁端点顺风向抖振最大位移高达53mm,可能会激起梁上小车与轨道的耦合振动,影响梁上电动小车行驶安全性,而横向和竖向脉动风下的振动位移很小,可忽略不计。The WAWS(weighted amplitude wave superposition) method,one of stochastic field simulation technologies,and finite element technology is combined to generate fluctuating wind field and further make buffeting response analysis of one container crane under the assumption of quasi-steady flow.The disturbing wind field simulation indicates the PSDs of the simulated samples agree well with the targets except the low frequency band of the auto-spectrums.Furthermore,displacement response spectrum of the front beam endpoint presents that the fluctuating wind can excite greatly the first mode of the crane.It is worthwhile to note that maximum displacement of the endpoint reaches 53 mm under the along-wind field and probably excites coupled vibration between the electric vehicle and the railway on the beam,which influences the vehicle running safety.However,both lateral and vertical displacements are so small as to be neglected.

关 键 词：集装箱起重机 脉动风场 谐波叠加法 抖振响应 

分 类 号：TH213.8[机械工程—机械制造及自动化] TH113.1