Simulation and Analysis of Main Steam Pipe Whip Based on LS-DYNA

In order to accurately simulate the collision process and obtain the overall distribution,the finite element model of main steam pipe and the U-bolt is established by LS-DYNA software,the collision process is simulated,and the U-bolt stress-strain distribution and time history curves is analyzed.The variation of the velocity and acceleration of the pipe is discussed and the detailed calculations of the U-bolt deformation and rejection are conducted.The result shows that the rejection of the finite element method is only about 36% of the rejection by kinetic analysis.