Dynamic Response Analysis On Caisson Breakwaters Under Simulated Stochastic Wave Forces

In the traditional design method of breakwaters, breaking wave pressure whichapply to stability checking computations is considered as a static force, and dynamiccharacteristics of breaking wave and breakwater motion are neglected. In this paper,the dynamic responses of caisson breakwater under simulated stochastic wave forcesare studied through Monte Carlo simulation and dynamic analysis means. The paperapply mass-spring-damper general parameters system to establish a correspondinganalysis model of cassion breakwater's four types of motions including vibrading,vibrading-sliding, vibrating-rocking and vibrating-sliding-rocking coupled motion,and check and prove the model by experiment data. And through Monte Carlosimulation, the dynamic responses of caisson breakwater under vibrading-sliding andvibrating-sliding-rocking coupled motion are statistically analysed and studied so asto provide theory instruction to dynamic design method of breakwaters.The qmain content included in the paper is as follows:1. A dynamic analysis model where the breakwater is considered as rigid bodyand the base is replaced by spring-damper system is founded and the correspondingcomputational formular are deduced. The model can simulate the four types ofpossible motions of caisson breakwaters under breaking wave impact and work outdynamic response parameters.2. Through the data provided by regular wave model experiment, a dynamicanalysis model and the corresponding numerical analysis method are checked andproved to be reliable which will provide theory instruction to dynamic design methodof breakwaters.3. Apply Monte Carlo simulation to research the dynamic responses of caissonbreakwater under simulated stochastic wave forces. As the slide is the main failureform, the paper makes certain the sliding disaplacement is the main research object,analyses the dynamic responses of caisson breakwater under vibrading-sliding andvibrating-sliding-rocking coupled motion, and works out statistical results of slidingdisaplacement and other response parameters so as to provide a new statistical designway to dynamic design method of breakwaters.