组合梁桥有限元修正模型的研究

Study on finite element model updating of composite beam bridge

为改善结构有限元模型的精度,减小理论模型计算结果与试验结果之间的误差,采用模型修正技术对建立的初始有限元模型进行修正。针对铁路组合梁桥模型修正的问题,进行了大量的试验和研究,着重对组合梁力学参数和边界条件进行了修正。结果表明,经过修正后的有限元模型计算结果与试验结果更加接近,模型修正是可行的、有效的。

To improve the precision of finite element model and reduce the error between the theoretical calculation result and test result,the finite element model updating technique is used to modify the original finite element model. In response to finite element model updating of railway composite beam bridge,a series of studies and experiments were carried out and more emphasis was put on modification of mechanical parameters and boundary conditions. The results compared before and after updating prove that the updated model calculation result is closer to the test result. The model updating method in this paper is practical and effective.