Model Experiment Study Of Impact Energy Of Mooring Ship Under Wave Action

The load of mooring ship is one of the main foundation for the design of open sea terminal. It is of key importance to conclude accurately the impact energy exerted by mooring ship under wave actions for the design of terminal and the selection and design of rubber fender. At the present time, there still have many difficulties to determine the impact energy of mooring ship ,for the impact energy of mooring ship is not only relevant to the conditions of wave parameter, but also it is influenced by such factors as the character of terminal, ship and mooring lines. Nowadays, the conclusion of the impact energy is based on the model experiment, however since many present research is based on the model experiment for a specific project and the simulation methods for experiment and the analysis methods for data are different, the result varies from different researchers. In order to get more precise experiment result, there are many aspects to be further explored.Based on the summarization of the research on impact energy of mooring ships under wave actions, some physical model experiments for large diameter cylinder wharf are conducted. According to the experiment date , this paper respectively analyze the main factors influencing the impact energy on wharf induced by mooring ships under the actions of random beam wave and oblique incident wave. The factors include wave height , period of wave, level fluctuation, loading, the condition of mooring lines. Furthermore, based on present research achievement, the calculation formula of impact energy exerted on terminal under the actions of regular waves and irregular waves is established. Based on the comparison of the impact energy resulted from the action of random beam wave and oblique incident wave. This paper advanced the calculation formula of impact energy under the actions of oblique incident waves.