梁结构上动载荷位置识别的快速算法

Fast method of the identification of dynamic load location on the beam

将简支梁作为研究对象,通过PATRAN软件建立梁的有限元模型,仿真计算出梁的位移响应,再利用MATLAB编写算法,识别出作用在梁上的动载荷的位置。在最小判别系数法的基础上提出了一种快速算法,该算法通过逐步逼近的方式来识别动载荷的作用位置。与常规方法相比,该快速算法减少了有限单元的划分,所以有效地减少了计算过程并且缩短了计算时间。通过仿真计算,验证了这一快速算法在保证了识别精度和准确性的前提下,缩短了计算时间,为动载荷识别工作带来了便利。

This paper used a simply supported beam as a study objective ,and set up the finite element model of the beam by PATRAN to obtain the simulating displacement response of the beam .The code was written in MATLAB to identify the location of the dynamic load acting on the beam .This paper proposed a fast method based on the minimum discrimi‐nate coefficient method ,and it identified the the location of the dynamic load by the way of gradually approach .Com‐pared with the common method ,this method cut back the calculation process and time by reduce the division of the finite elements .Simulation showed that this fast method reduced the time of calculation with ensuring the accuracy and exact‐ness of the identification ,which brought convenience to the work of identifying dynamic loads .