Seakeeping Of Submarine Remote Model By STF Method Prediction And Water Tank Test

Submarines are always disturbed by wave force when they are navigating in free surface or closing under free surface,which leads to submarine body's six degrees of freedom motion.In bad sea conditions,little-range response of submarine body motion will reduce the impact to the stability of the combat platform.In this way,the submarine hull has better seaworthiness.To predict the submarine's motion response precisely in waves,by using methods not only theoretical computing but also self-propelled model experiment,this paper researched on the performance of scaled-down submarine self-propelled model in different conditions,such as serials of submergence depths,navigating directions and speeds,and obtained the self-propelled model's response amplitude operator(RAO)in regular waves.This paper programmed using linear distributed source at triangle panel method,and calculated out the self-propelled model's additional mass in unbounded flow field,and Munk moments in different working conditions of seaworthiness experiments,Vertical suck forces and pitch moments in different distance near bottom in different working conditions of seaworthiness experiments,1st and 2nd order wave force(moments)in regular waves.These parameters are referenced by self-propelled model's motion control,and provide criterion to operational driver equipments.In STF theory and Frank source close-fitting method,it programmed strip method for seakeeping prediction,and calculated out self-propelled model's 1st order radiation forces,incidence forces and diffraction force and response amplitude operator(RAO)in regular waves in working conditions of serials of submerge depths,navigating direction and speeds.In the seaworthiness experiment of self-propelled model,firstly made a scaled ratio?27 self-propelled model carrier,and then integrated self-propelled model's motion control and communicating systems with its testing systems,debugged motion controlling and test collecting software,finally conducted seaworthiness validation experiments in Deep Tank of Harbin Engineering University.This paper made the following progress:1.Programmed linear distributed source at triangle panel method,calculated out self-propelled model's 6DOF additional mass in unbound flow flied,and Munk moments in different experimental speeds,which provides reference for motion control and and provide criterion to operational driver equipments for self-propelled model's speed keeping in seaworthiness experiments.2.Programmed vertical suck force by using method of images,calculated out self-propelled model's vertical suck force of different distance near wall,which provides reference for motion control and provide criterion to operational driver equipments for self-propelled model's submerge depth keeping in seaworthiness experiments.3.Programmed panel method disregard wave making at free surface,calculated out self-propelled model's 1st and 2nd wave forces(moments)near free surface by keeping submerge depth at specific speed,which provides reference for motion control and provide criterion to operational driver equipments for self-propelled model's submerge depth keeping and speed keeping near free surface in seaworthiness experiments.4.Programmed strip method by using STF theory and Frank source closing fit method,calculated out self-propelled model's response amplitude operator RAO in regular waves in working conditions of serials of serials of submerge depths,navigating direction and speeds.5.System integrated and debugged self-propelled model controlling system's hardware and software,and then conducted submarine self-propelled model's seaworthiness validation experiments,finally compared and analyzed with calculation result.