Study on the influence of the launcher support stiffness on rocket initial disturbances

The relation between some rocket launcher support stiffness and the initial disturbances of the rocket was studied by the method of combining the multi-rigid-body dynamics simulation with the experiment implemented by designing launcher with adjustable support stiffness and using optical lever measurement. The results show that the launcher support stiffness can affect the initial disturbances of test rocket, and along with the change of launcher support stiffness continuously, there are the extreme point on the curve of initial pitching velocity of the rocket.