Research On Node Cable Release Simulation Based On Open Source Platform

As the oil and gas exploration and development in the land and shallow sea area is approaching the peak,the offshore energy seismic exploration becomes more and more urgent.As one of the important means of ocean exploration,nodal cable releasing system not only gets rid of the time constraint and noise interference of cable operation,but also can be flexibly deployed on the seabed,and the data collected is of higher quality.In the research and development of the cable releasing software,China urgently needs to develop the software with independent intellectual property rights.In this paper,the centralized mass method is adopted to model the node cable releasing system,and the factors affecting the motion of the node cable releasing system are simulated and analyzed.The main research conclusions are as follows:(1)From the two aspects of time domain and space domain discrete,the centralized mass method was used to model the node cable releasing system.The force analysis,Marine environment,cable conditions,motion state,initial conditions and boundary conditions were analyzed,Optimize the process of solving the model,and the fourth-order runge-kutta method was used to solve the model.(2)According to the node cable-laying model,the simulation is carried out by the control variable method.The results show that the smaller the cable tension,the faster the sinking speed of the cable and the node;the closer to the seabed,the smaller the influence of tension on the sinking speed;The depth,the greater the wet weight,the greater the cable tension.The cable line density increases and the cable sinks faster.The influence of the tangential resistance coefficient on the joint-cable coupling motion is negligible;the normal resistance coefficient can not be ignored,and the smaller the normal resistance coefficient,the faster the node cable sinks.The higher the cable speed,the faster the node-cable sinks;the higher the ship speed,the faster the node-cable sinks and the greater the lateral offset.By changing the magnitude of the fluid density,the change in the motion state of the node's cable is very small and can be ignored.The smaller the longitudinal current velocity,the faster the node-cable sinking;the greater the lateral current velocity,the greater the lateral offset of the node-cable.(3)The simulation system(NCSS)with independent intellectual property rights and the simulation system software for node cabling motion were developed.Simulation calculation,image control and error analysis are realized.