塔式起重机非线性地震反应研究

发布时间：2018-05-02 19:15

  本文选题：塔式起重机 + 非线性　； 参考：《机械设计与制造》2016年08期

【摘要】：以某塔式起重机为研究对象,利用ANSYS软件计算塔机最大独立状态下的固有频率,并得到其前六阶振型和基本周期。选用El-Centro波作为地震动输入,采用时程分析法,计算抗震设防等级为7度时地震作用下塔机动态响应。对比线性和非线性分析计算结果,得出非线性因素对塔机结构动态响应影响很大。计算塔机起重臂与地震载荷处于不同角度时的非线性地震反应,结果表明,起重臂与地震载荷间的夹角对塔机结构的动态响应具有一定影响,当起重臂与水平地震载荷平行时,有利于塔机结构的安全。
[Abstract]:Taking a tower crane as the research object, ANSYS software is used to calculate the natural frequency under the maximum independent state of the tower crane, and its first six order modes and basic cycles are obtained. El-Centro wave is used as ground motion input and time history analysis method is used to calculate the dynamic response of the tower crane under the earthquake resistance level of 7 degrees. The contrast linear and non line are compared. The results show that the nonlinear factors have great influence on the dynamic response of the tower crane structure. The nonlinear seismic response of the tower crane and the earthquake load at different angles is calculated. The results show that the angle between the lifting arm and the earthquake load has a certain influence on the dynamic response of the tower crane structure, when the arm and the horizontal seismic load balance are taken. When traveling, it is beneficial to the safety of the tower crane structure.

【作者单位】： 西南交通大学机械工程学院;
【基金】：四川省国际合作研究计划(2014HH0022)
【分类号】：TH213.3
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本文编号：1835140