Design And Implementation Of Virtual Simulation System For Large Oil Tanker Auxiliary Boiler

Large oil tanker auxiliary boiler is one of the typical equipment in the marine auxiliaries.It plays the role of heating cargo oil,marine fuel oil and lubricating oil,driving steam auxiliary machines such as cargo oil pumps,and meeting the needs of ship navigation and cargo oil transportation.Ensuring the safe operation of the boiler is of great significance to the normal operation of ships.At the same time,the auxiliary boiler system is complicated and contains many devices.It requires engineers to obtain a high technical level and the ability to respond to emergencies through training.The use of physical boilers for training engineers is limited by space and cost.The use of simulation simulators for training engineers is mostly semi-physical simulation or two-dimensional software interface,which lacks dynamic display effects.The subject takes the Mitsubishi MAC-S45 B boiler as the research objet,combines traditional twodimensional simulation software with virtual simulation technology to establish the virtual simulation system for large oil tank auxiliary boiler.This system realizes the model display of the auxiliary boiler in the virtual scene,the basic operation of related equipment,and the synchronization of the virtual scene and the two-dimensional interface state,which has certain practical significance.In this subject,the mechanism of large oil tank auxiliary boiler is taken into study.According to the characteristics of the auxiliary boiler system,through certain simplifications,the mathematical models for four modules: furnace,economizer,steam drum,water wall and downcomer are established by using hybrid modeling method,lumped parameter method and applying mass conservation,energy conservation,engineering thermodynamics theories and empirical formulas.According to the established mathematical model,the simulation model for each module is established by using Matlab/Simulink,and the whole model of the boiler is combined through the connection of input and output parameters.Then simulation experiments are carried out on the whole model of the boiler by setting reasonable parameters.Simulation results show that the static simulation results meet the accuracy requirements of the simulation system,and the dynamic simulation result conforms to the dynamic response law of the real marine boiler.Simulation results prove the rationality and accuracy of the model.Secondly,on the theoretical basis of established simulation model,using C# language to develop two-dimensional simulation software in the programming environment of Visual Studio.The software includes the visual simulation interface terminal of the boiler water system,fuel oil system,steam system and control box panel,and the simulation model terminal responsible for logic control and mathematical model calculation.It realizes the functions of the basic operation of the boiler in manual/automatic mode,simulating the actual operating status of boiler and displaying the operating parameters of boiler in real time.Finally,the three-dimensional model of boiler is established and optimized by using 3ds Max.The virtual scene is designed in the Unity platform.Through the use of collision detection technology,ray picking technology and designing the actions of the interaction points,the function of scene roaming and operation of the interaction point are realized.The UDP Socket connectionless communication mode is used for carrying out data transmission between the two-dimensional simulation software and the virtual scene,realizing the real-time synchronization of the two-dimensional simulation software and the virtual scene state.