Design And Optimization Of Air-cast Marine Emergency Drifting Buoy Structure Based On Numerical Simulation

With the continuous development of nuclear power systems at sea,China has paid more and more attention to the tracking and monitoring of radioactive elements at sea.After querying and analyzing the monitoring methods of marine radioactive elements,the marine buoy system is selected for emergency tracking and monitoring of marine radioactive elements in view of strong randomness,rapid response,low economical efficiency and personal safety.In recent years,with the continuous development and utilization of the ocean,the development of marine buoys has become more and more rapid.Based on the marine drifting buoy model,this paper completed an emergency monitoring system that can respond quickly,implement large-area deployment and remote control in the event of a marine nuclear accident through design optimization,simulation analysis and assembly testing.In this paper,for the characteristics of the designed buoy.with high strength,the method of numerical analysis of the impact strength of the buoy shell and the center plate is adopted,and the selection of the shell type is completed;and the method of adding the reinforcing rib and increasing the thickness of the bottom surface is adopted.The strength of the housing is further optimized.After the final stability check,it meets the stability requirements of the buoy work.In the study of the impact response and attitude of the buoy into the water process,the simulation of the water inflow of the buoy was carried out by using the CEL algorithm in Abaqus,and the conclusion that the buoy has the best stability with horizontal velocity and positive tilting into the water is obtained.Then,through the establishment of the numerical pool,the static stability of the buoy in the wave under normal sea conditions is obtained,and the method of adding the mooring system to improve the static stability of the buoy is proposed for the accident sea area.According to the static stability of the buoy when adding different mass anchors The change has chosen the reasonable quality of the anchor.Aiming at the collision situation of a large number of buoys in a small range,thestrength analysis of the shell collision is carried out.According to the failure condition and position of the buoy shell,a rubber protection ring is added on the top of the buoy to achieve further enhancement of the buoy.The purpose of the shell’s impact resistance.Finally,the design and assembly work of the buoy entity is completed,and the buoy is analyzed and experimentally verified.The results are basically consistent with the simulation analysis results,and the emergency monitoring of emergencies can be completed.In this paper,the design calculation,simulation analysis,multi-angle improvement and assembly test for emergency monitoring drifting buoys have reference value for researching marine radiation monitoring system and diversification of buoy function,and also accumulated experience for research and development of other buoy systems in practical engineering..