Abstract: In the fluid-carrying piping, the phenomenon of water hammer may be caused by various reasons, and so does harm to pipes and equipments. In order to understand the generation and development courses of water hammer, pressure wave and it's effect on the piping, and also for the prevention of the damages on pipes and device which was caused by water hammer, the dynamic analysis model of piping effected by the pressure wave which was caused by the sudden closing of the pump in the piping was established by using CAESAR II software, the professional software of piping analysis and design. According to the spectrum of water hammer, the displacement, stress and reaction force/moment of all key points of piping was analyzed under the condition of the dynamic load of water hammer, and meanwhile the modal analysis and nature frequency analysis was carried on. These results are references for reasonable design of piping, strength of pipe and the relieving of water hammer.

Key words: pipe, pump, water hammer, dynamic analysis