Research On Operation Scene Simulation Technology Of ROV

Emergency maintenance operation for underwater facilities of offshore oil and gas fieldshas the characters of complex operating environment, difficult anticipation of the operationcondition, great risk and hard personnel training. The ROV underwater operation simulationtraining system makes the on-job training of the stuffs in virtual environment possible,making the stuffs perceive operation requirements and workflow, leading them to studyoperation regulations and enhance the safety awareness simultaneously. In addition, the ROVsystem can also preview the underwater operation, evaluate the feasibility of the operationprogram and promote work efficiency and security.The ROV operation visual simulation subsystem is an important part of the ROVunderwater operation simulation training system, which simulates the3D models and oceanenvironments distinctly by the visualization technology, generates the training scenes ofremote operating, observing and testing, offers vivid underwater operations vision to theoperation reviewers for the assessment of the feasibility and availability.Based on the ROV operation visual simulation technology, the following aspects ofresearch are consisted in this paper:Firstly, the static3D database is created with Multigen Creator based on entity models.Then the programming joint between OpenGL and Vega Prime is studied with much moreattention, and the seabed terrain is generated with OpenGL in Vega Prime environment,according to the South China Sea real submarine terrain elevation data and texture mapping.During the process, the multi-resolution terrain generating technology and the texturemapping method based on regular grids, which solve the problem of time and space continuity,are used to generate the seabed terrain. The accelerating technology used for the virtual scenegenerating in real time, improved the generating efficiency.Secondly, by analyzing the force condition of the flexible umbilical cable, establish andsolve the hydrodynamic equation, and OpenGL is utilized to set up dynamic model for thecable.And then join the flexible umbilical cable and the scene made by Vega Prime togetherbased on the maturely studied technology of programming joint. Thirdly, the hydrodynamic characteristics of the propeller is calculated by Fluent, and thedata of the flow field is extracted, based on which the screw water effects is simulated inparticle system of Vega Prime.Finally, the simulation design containing the modules of scene roaming, ROVmovements visualization, sonar simulation, collision detection and three-channel display isrealized, and the ROV underwater operation vision is rendered and driven by integrating allthe function modules with VC++.The visual simulation of ROV underwater operation is realized in this paper, whichsatisfies the demands of fidelity and timeliness, offering the real and vivid underwateroperation scene for ROV underwater operation simulation training system.