Lightweight Design Of Anchor Machine Support Structure And Secondary Development Of Topology Optimization Progra

Lightweight design of ship-related structures can save manufacturing materials and reduce fuel consumption,thereby greatly reducing costs and contribute to environmental protection.It is one of the important development directions of the ship industry.At present,the research on ship lightweight design at home and abroad mostly takes the main structure as the object,and few studies have been conducted on the auxiliary structure such as the supporting structure of the windlass.The research on the secondary development program of topology optimization also focuses on improving the algorithm and verify it,without corresponding improvement for practicability.Therefore,this dissertation aims to reduce weight by establishing the finite element model of the supporting structure of the windlass for topology optimization and size optimization,and to complete the secondary program development of practical topology optimization for ship designers.The main research contents include :According to the relevant theoretical basis of structural optimization design at home and abroad,the framework for lightweight design of the supporting structure of the windlass and secondary development of topology optimization program is determined.Based on the theory of finite element method and drawings,the finite element model of the port side part of the supporting structure of the windlass is carried out,and the size and direction of the load under various working conditions are emphatically calculated.According to the static analysis results,the strength and stiffness of the model meet the specification requirements,the overall average stress is low,and the weight can be reduced through structural optimization.According to the results of modal analysis,how to restrict the frequency in the subsequent optimization is determined.The correctness of the model is verified by stress test.The topology optimization of the original model is carried out in Hyper Mesh software,focusing on the influence of different parameters on the optimization results,and the group with the best combination effect is selected as the final result.Combined with the sensitivity analysis results,the size optimization of the original model is carried out,and the advantages and disadvantages of the two methods in weight reduction are obtained.Finally,the size optimization method based on topology optimization is selected for lightweight design,and the optimization results are calculated under hoisting conditions,and the structure that can reduce weight by 45.1% is obtained.Based on the relevant theoretical basis of PCL language and BESO method,the secondary development of topology optimization program on MSC.Patran/Nastran platform was completed for the purpose of meeting the practicability,and it was verified by different cases.The results show that the program can realize the function of dividing different optimization target areas in the design area under multiple working conditions,and the optimization results are similar to those of professional optimization software.