Accuracy Analysis of Displacement Response Identification in Truss Structure Using Finite Element Time-domain Integration Methods
This article derived four finite element time-domain integration methods and applied them to calculate and ana-lyze the accuracy of displacement identification response in triangular truss structures through simulation.The stiffness ma-trix and mass matrix were established separately by using the finite element method,and the size of the time step was deter-mined.The degree of freedom displacement error calculation of different time-domain integration methods was determined based on the solution of the modal superposition method.The results show that under normal circumstances,a time step co-efficient of τ=1/3 can provide the best accuracy.Compared with other methods,Wooram Kim's two-stage explicit time-do-main integration method can ensure higher accuracy of displacement identification,present small overshoot at inflection points,and have higher stability in simulation calculations.
time integration methodstructure dynamicstriangular truss structurefinite element method
万方数据
维普
