Research On Simulation Technology Of Deep Sea Environment And Development Of Simulation Experiment Device

With the continuous development of the world economy,the consumption of source energy has been sharply increasing,which leads to a increasingly severe shortage of available non-renewable resource in mainland.In order to alleviate the severe stress of global resource,many countries have pay their attention to ocean and play a positive role in the exploitation and utilization of its resource.However,due to the complicated environment of deep ocean,the exploitation greatly depends on whether the equipment functioning under water are advanced enough or not,of which a indispensable step is making simulation experiment,that is,simulating real working environment via experimental facilities in order to testify whether them can functioning well or not under deep water.Therefore,carrying out simulate researches in deep ocean has vital significance as well as practical value for the technology of advancing equipment working under water.This paper mainly focus on following researches:After analysing and comparing common plans,some drawbacks was found out and then decided the direction and content as well as technical parameters of the research of our project.According to the traits of the pressure vessel’s parameters,a pressure dynamically and statically controlling module is developed,which enable simulate pressure ranges in a large scope continuously and can track down target curves in different forms.In order to solve the problem that the system pressure cannot come back to target value rapidly caused by test-piece’s explosion in actual application,put up forward a pressure controlling program combining coarse controlling and elaborate controlling.Moreover,in order to coordinate the working relationship of every modules,the related procedure and regulation was standardized,which laid foundation for the construction of the experimental platform.In order to testify whether the pressure dynamically and statically controlling module can fulfill the design index of the simulate experimental device and did theoretical analyses of these models.As there are some problems that,for example,the volume of pressure vessels is too big that leads to strong inertia during the system pressure controlling process and nonlinear phenomenons have influence on the performance of pressure controlling and so on,a PID controller based on system open-loop characteristic was designed a.By analyzed its tracking performance of different curves to perfected the PID controlling parameters and improved its response speed and tracking precision as well as the simulation experimental device’s pressure dynamically controlling performance.In order to analyze the rapid pressure compensation module’s working performance,this report mainly focus on the gas accumulator model and constructed related transfer functions to study its intrinsic features.As the accumulator parameter model is too complicated that there are lots of factors having influence on its ability to absorb pressure pulsation,this paper apply the MATLAB software to do simulation experiment on accumulator’s dynamic characters and by means of explicit analyses to get a fitting accumulator model and related parameters for our project.Besides,in order to study the influence of connected pipeline and the initial pre-charged pressure and other parameters having on rapid pressure compensation module’s response speed and ability to compensate,based on AMESim software constructed a rapid pressure compensation simulation model and get a fitting pipeline parameter model for our project.As the rapid pressure compensation module,based on gas accumulators,has limited ability and it cannot enable the system pressure come back to target pressure when it works alone,some related simulation experimentwas did to testify the results.In order to testify the feasibility and availability of the technology of the environment experiment imitator of the deep-sea which did research on and whether its performance index is qualified for the design requirements to constructed a platform for environment experiment imitator of the deep-sea.Besides,in order to get a blast cartridge model which has ideal blast stress to lay foundation for rapid pressure compensation experiment,this report did research on blast cartridge by changing the thickness of copper sheet and the core aperture of splint separately.Moreover,in order to testify the experiment imitator’s pressure dynamically controlling performance,did some curve tracking experiment separately based on PID.Finally,in order to fulfill the intrinsic technological demand of rapid pressure compensation module,By changing the accumulator’s initial pre-charged and did rapid pressure compensation researches on this model and its improved models to testify its effect.