Shock Response Analysis Of Complex Warship Piping System

The shock resistance of warship piping system, which is related to the vitality of battling warship, has being paid much attention by navy of each country. Real battle and prototype explosion testing indicated that the destruction of the piping system may result in the failure of ship power plant and then cause the warship loss of combat capability. Therefore, the study of shock resistance of piping system is particularly important.This paper applied transfer matrix method widely used in ship vibration analysis to the impact issues of warship piping system. A program was developed based on the matlab language to calculate the shock response of complex piping system impacted by multi-support. The main work of this paper includes the following four aspects:Firstly, the tension, torsion and bending vibration transfer matrix of a pipe is established based on Timoshenko beam model. The transfer matrix of typical components commonly used in piping system is deduced from the perspective of mechanics.Secondly, transfer matrix method and mode superposition method was combined to solve the transient response of ship piping system, and the results will be compared with the experimental data to verify the effectiveness of the method.Thirdly, the characteristic of impact excitation from pipe supports was studied, and the method to obtain equivalent impact load by multi-support excitation was proposed.At last, the program developed in this paper was used to calculate the shock response of piping system induced by underwater explosion. Then the influence of boundary conditions of piping system, arrangement of support and elastic support on shock response of piping system was studied.