Research On Simulation Of Vertical Loading System Based On Ship Motion Simulation And Forecast

In recent years,with the extensive exploitation of land resources,nearly exhausted,people pay more and more attention to the exploitation and utilization of marine resources.At the same time,with the increase of China’s import and export trade volume,a large number of Chinese merchant ships travel to and from all over the world.As terrorism and piracy are increasingly rampant,the safety of Chinese merchant ships sailing abroad are threatened.In order to guarantee our country’s legal maritime rights and interests and provide guarantee for the safety of merchant ships,higher requirements are put forward for the development of naval equipment and the warship’s ocean-going combat capability.Missile vertical launching technology has no dead angle,and it improves the response speed and coverage of warships.This technology is the new trend of the development of China’s shipborne missile launch in the future.How to carry out the vertical loading of the missile quickly and accurately is a difficult problem to guarantee the warship’s ocean-going combat capability.In order to solve this problem,on the basis of establishing the mechanical structure model of shipborne missile vertical loading system,this paper takes into account the influence of random ocean waves,the response of ship’s wave load,the control mode of system wave compensation device,and so on.The dynamic joint simulation of vertical loading system is carried out to obtain the dynamic response of vertical loading system under different sea conditions.The main work of this paper is as follows:First of all,the composition of the missile vertical loading system is analyzed,the operational flow of the missile vertical loading is determined,and the missile vertical loading system with wave compensation device and vertical loading device as the key is established.Secondly,the wave simulation method is used to simulate the rocking motion of ships under different sea conditions.The random wave mathematical model is established.The wave simulation program is compiled by using the mathematical model and the wave energy spectrum simulation method,and the ship motion simulation platform is established.Using this platform,the simulation curves of random wave energy spectrum,curves of wave height and inclination angle in rolling and pitching direction,curves of ship rolling and pitching motion angle are obtained.Then,the relative motion state of two ships during vertical loading operation is simulated by two short-term prediction methods in time domain and frequency domain.The feasibility of the AR prediction model is verified by using the data obtained from the wave simulation.The short-term prediction of ship motion based on the time-series AR autoregressive model is verified by simulation and error analysis,and the prediction accuracy and applicable conditions of each method are compared.Finally,The wave compensation principle of the two-axis stabilized platform is analyzed and the attitude calculation is carried out.The relationship between the platform position and attitude(the tilt angle of the upper platform surface)and the extension of the horizontal and vertical axis is obtained.The dynamic simulation of missile vertical loading system is carried out by using ADAMS and MATLAB,which ensures the integrity of mechanical system modeling and the accuracy of system control,improves the simulation accuracy,and ensures the similarity between the test conditions and the real marine environment.The response of the system under different sea conditions is obtained,which provides data reference for the optimization of virtual prototype.