Study On Hydroelastic Nonlinear Load And Structural Response Of Ship

With the rapid development of the maritime transport industry and the speed of the construction of merchant ships,large ships are becoming more and more popular.The increase of the ship’s scale makes the coupling between the hull structure and the fluid become more and more obvious.The traditional hull is regarded as a rigid structure The way has been unable to meet today’s computing needs,and now wave-induced large-scale ship hydroelastic response has become an important research topic.Ship as a large and complex sea transport,once the structural damage problems,is likely to cause the loss of materials and personnel casualties.Therefore,the calculation of the strength of the hull structure must be safe and reliable,in order to eliminate the hull structure damage and failure phenomenon of security risks.This paper is based on the theory of water elasticity of nonlinear load and structural response research,in order to make the hull structural strength assessment more reliable.Firstly,based on the calculation of linear water elasticity theory,the non-linearity of slenderness and slamming effect is added.Based on this,the calculation program of nonlinear water elastic load is compiled.The comparison between the experimental results and the experimental results shows that the program accuracy.The effects of non-linear factors such as non-linearity and slamming effects on the load results are discussed.The influence of speed on the slamming effect is analyzed.Secondly,with a certain 100,000-ton bulk carrier as the research object,using COMPASS-WALCS-BASI software to carry out the design wave analysis and analysis to determine the wave wave angle,frequency,and amplitude and other parameters for the subsequent wave load The wave information is provided,and the dangerous profile of the hull is found by the wave spectrum analysis method to facilitate the subsequent analysis of the dangerous profile.Thirdly,the quasi-static analysis method is applied to the response analysis of the nonlinear water-elastic load,and the results of the bending stress of the hull are obtained.The finite element model of the bulk carrier is established by using the finite element analysis software MSC / PATRAN.The quasi-static response of the ship’s hydroelasticity is numerically simulated.The results include t he bending stress considering and not considering the slamming effect,And the results of the classical beam theory are compared,and the feasibility of the method is analyzed according to the comparison result.Finally,the dynamic response of ship hydroelasticity is simulated by finite element analysis software MSC / PATRAN.The dynamic analysis method is applied to the response analysis of nonlinear hydroelastic loads.The results of stress calculation are considered respectively.The results of quasi-static,dynamic and classical beams are compared.The quasi-static method and the quasi-static method are discussed.The advantages and disadvantages of the dynamic method in the nonlinear water elasticity correlation calculation are studied,and the applica bility of the two methods is studied.