大型桥吊结构动力有限元模型修正

Dynamic Model Updating of the Port Crane

在建结构有限元模型时 ,所建的有限元模型与结构的真实情况不可避免地存在着差异 ,要建立精确的有限元模型 ,必须用试验得到的结果对有限元模型进行修正 .利用有限元分析软件ANSYS的优化功能 ,对桥吊进行模型修正 ,修正后的有限元模型为结构瞬态动力学分析提供了切合实际的数学模型 .

When setting up a model for the structural finite element,we should recognize that there is inevitably a difference between the model and the real crane.To make the model accurate,we must update the model with the results of the test.In this article,we use the optimization function of ANSYS to update port crane's model.The parameter to update in the model is actually from the trait of the section of the beam.The updated finite element model provides a practical mathematical model for the transient dynamic analysis of the structure.