Assesing whipping vibration on damage floating life of Catamaran using one way fluid-structure interaction method

The knowledge of applied loads on the floating structure is necessary from the beginning of design procedure. One of the most important loads which is applied on the floating structure is the impact loads due to the rapid impact of the ship with the water surface. This type of load, known as slamming load which can increase the yield level and althought cuases high-amplitude vibrations in the struture, which are also known as whipping vibrations. The purpose of this paper is to investigate slamming loads and whipping vibrations in catamarans. In this paper, using computational fluid dynamic method (CFD), hydrodynamic loads and impacts on the vessel are investigated. Then, using the one-way fluid-structure interaction method, the effects of wave slaming impact on the catamaran is investigated and also the resulting vibrations is be investigated. Then, using the Miner-Palmgren cumulative life estimation method and the rainfall count cycle method, the effect of this type of vibration on the failure and destruction of the floating structure is investigated. The results illustrate that the whipping vibration have a significant effect on the life of catamaran.