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工程力学  2015 

基于应用程序交互访问技术的桥梁有限元模型修正研究

DOI: 10.6052/j.issn.1000-4750.2014.03.0177, PP. 174-182

Keywords: 有限元模型修正,桥梁结构,应用程序交互,静动力实验,损伤函数,损伤识别

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Abstract:

传统的有限元模型修正方法对于具有复杂多自由体系的大型桥梁结构显得束手无策,其中一个重要的原因是大型桥梁结构体系很难用有限元编程精确地表达,难以建立完整的或者缩聚的质量矩阵和刚度矩阵。该文开发了基于应用程序交互访问的有限元模型修正模式,首先在Strand7软件中建立初始的有限元模型,然后利用MATLAB建立迭代程序并调用Strand7软件,通过读写Strand7中的物理参数来更新模型,实现了大型桥梁结构有限元模型修正。该文对一座实桥进行多参考点脉冲锤击法模态试验和静载试验,基于获得的静动力试验数据和Strand7有限元模型分析结果,引入损伤函数的概念识别得到了该桥各梁的分段刚度,成功地实现了单元层次的参数识别。

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