Research On Accurate Modeling And Verification System Of Controllable Propeller Based On Knowledge Engineering

The adjustable pitch propeller as a common propeller in the marine field has the advantages of convenience,manoeuvrability and rapidity.With the development of China’s maritime shipping industry,the speed of response for ship construction is becoming more and more demanding.As one of the key components,the adjustable pitch propeller,due to its complex structure and long design cycle,is able to carry out rapid design which is crucial to the viability of the enterprise.This study takes the pitch-adjustable propeller as the target object and develops a system with knowledge engineering technology to achieve rapid design and verification of the components of the pitch-adjustable propeller to meet the needs of the enterprise.The specific tasks are as follows:(1)Through the study of knowledge engineering and SolidWorks secondary development techniques,a knowledge acquisition,representation,reasoning and integration approach suitable for adjustable propellers was selected,as well as a combination of programming and dimension-driven methods for the design of out-of-component applications,providing a theoretical basis and technical support for accurate modelling and calibration of adjustable propellers.(2)The overall structure and drive principle of the adjustable propeller is analysed,with a focus on the design knowledge of the relevant components,including geometrical parameters,calibration calculations,performance aspects,etc.The structural framework and implementation of the knowledge base is investigated,and a knowledge base driven design approach is implemented.(3)Analysis of the design requirements of the system,both overall and in detail,and the study of accurate modelling,automated assembly and rapid verification techniques,providing a methodological basis for the implementation and operation of the system.(4)Based on the failure of the rudder gear,the system was analysed using an adjustable propeller accurate modelling and verification system.Modal analysis was also carried out to determine the stability of the structure and to analyse the effect of the load moment on the main stress of the gear.Finally,an adjustable propeller upper assembly is generated based on the system to verify the feasibility of the system and improve the design efficiency.