Calculation And Simulation Study Of Marine Anti-heeling Driven By Airbag And Based On Inland River

In recent years,the capsizing incidents of domestic and foreign passenger vessels in the harsh sea conditions have taken place from time to time,which has seriously endangered the lives and property of crew members and tourists.For this reason,after a lot of data research,we propose to apply the airbag to the ship safety and apply for the related patent.The method has a certain innovation and will bring great significance to the ship safety research.The specific research work of this article is as follows:First of all,from the aspects of statics and dynamics,the mechanism of the ship’s rolling motion is studied,and the model of "ship-airbag" heel motion equation is established.Taking an inland passenger ferry as an example,the static stability theory under large angle is calculated and analyzed to study the influence of the airbag on the ship stability.Then,based on the principle of push-plate wave and Arbitrary Lagrange-Euler(ALE)method,numerical wave-making was carried out,and the finite element model of ship and airbag was established.The fluid-structure interaction between ship and water was studied.Finally,the simulation study of the effect of emergency airbag on the anti-heeling motion of the ship was performed under the wave,and the theoretical calculation was further verified.Finally,a scheme of airbag connecting device is designed based on the parameters of actual ship and the calculation results.The stability status of the airbag with 5°,10 °,16 ° and 20 ° is selected to analyze the corresponding airbag force.Through the joint simulation of SolidWorks and ANSYS software,the stress and strain concentration and the variation along with the increase of the angle under different inclination angles were analyzed and the reasonable acceptance was confirmed.On this basis,the response surface design method continue the optimal design of the airbag connecting device.This paper validates the rationality and feasibility of the air bag ant-heeling method by simulation software and calculation analysis,and achieve the optimization results for the actual ship airbag connecting device.