Structure Design Of Self-walking Platform For Marine Environment Monitoring

In order to meet the actual demand for long-term and large-scale monitoring of the ocean environment,a marine environment monitoring self-propelled platform emerged as a new marine environment monitoring equipment.The platform is a new marine environment monitoring platform that can realize autonomous navigation without carrying energy.Its main structure is composed of three parts: a surface mother ship,an underwater tractor,and a flexible connecting cable.The platform overcomes the shortcomings of traditional ocean monitoring equipment in energy supply by acquiring wave energy,solar energy and wind energy in the ocean as its self-propelled power source.This article takes the marine environment monitoring self-propelled platform as the research object,and introduces the structure and function of each part of the platform.The surface mother ship is used as a platform floating device,which is mainly used to carry various electrical control equipment and solar and wind power generation devices.The flexible connecting cable is used to connect the surface mother ship and the underwater traction machine.The underwater traction machine is to realize the platform self-walking function.The main source of power,which can directly convert wave energy into the kinetic energy of the platform forward;Description of the platform’s sensor monitoring function and remote communication function,and a specific discussion on it in principle;By studying the motion law of sea waves and water quality points,introduced the working environment of the marine environment monitoring self-propelled platform,and focused on the analysis of the movement mechanism of the platform to convert wave energy into kinetic energy,that is,whether the platform is in the rising or falling stage of the wave,the underwater tractor can move the wave up and down,the undulating force is converted into the driving force for the platform to move forward;In addition,the platform’s utilization of solar energy,wind energy,and wave energy is also studied,and the specific control plan of the platform for a variety of new energy sources is designed and proposed.Based on the study of the composition,structure and function of the marine environment monitoring self-propelled platform,the design points of the key structures of each part of the platform are proposed,and the three-dimensional model of the marine environment monitoring self-propelled platform is established using the Soildworks 3D mapping software.By analyzing the buoyancy and density requirements of the surface mother ship,a streamlined mother ship hull is designed;By studying the flexible connecting cables connecting the surface mother ship and the underwater tractor,and analyzing the bending hysteresis characteristics,the bending moment and curvature are obtained.Relationship,so that the most vulnerable point of the cable is the connection point between the cable and the surface mother ship and the underwater tractor;By analyzing the force of the underwater tractor,it is concluded that the forward thrust of the underwater tractor can not be infinite.In addition,the freedom requirements of the platform during the movement are analyzed,and a rigid cross shaft universal joint is selected as the connection scheme for connecting the surface mother ship and the underwater tractor.Completed the structural design of the marine environment monitoring selfpropelled platform,and carried out hydrodynamic simulation analysis on the two key structures of the surface mother ship and the underwater tractor.Based on the RANS equation and the turbulence model,the k-ε mode is selected,the unstructured mesh is used as a whole,and the hull interface resistance of the surface mother ship is analyzed using the Fluent module in the Ansys software to further optimize the design structure of the surface mother ship.The basic reference scheme for reducing the forward resistance of the mother ship is discussed;For underwater tractors,the influence of the shape of the flanks,the maximum swing angle of the flanks and the optimal distribution distance of the flanks installed on the overall propulsion efficiency of the platform are mainly studied.Finally,the platform is subjected to motion simulation to verify the approximate motion status of each part of the platform structure by means of virtual experiments,and the prototype is completed in the laboratory,and the appropriate pool test plan and sea test plan are formulated.Through the pool test,the advance resistance of the platform under different sea conditions was studied,and its overall propulsion efficiency under different sea conditions was verified;the stability of the platform operation was verified through the sea trial test,and the sensor monitoring function and remote Communication function;Then compare the test results with the results of the previous computer simulation calculations to verify the feasibility of the design of the marine environment monitoring self-propelled platform,master the optimization parameters and propulsion performance of the platform under different sea conditions,for the same type of marine environment monitoring self-propelled platform,the structure design provides reference suggestions.