Research On Optimization Of Prefabricated Structure Design Based On Improved Cyclical Parthenogenesis Algorithm

Prefabricated building is one of the most important building structures in our country nowadays.Optimizing its structure design can make its resources allocated reasonably and optimally.With the development of science and technology,many large-scale finite element softwares with optimization function have been developed.However,the research and application of optimization algorithm for prefabricated structure design are relatively scarce.In this dissertation,the improved cyclical parthenogenesis algorithm(ICPA)is used to study the multi-objective structural scheme topology optimization for prefabricated structural design optimization.Firstly,based on the cyclical parthenogenesis algorithm(CPA),the concept of chaotic initialization,step-size adaptation,information entropy and chaotic search was proposed to improve the cyclical parthenogenesis algorithm,which solved the problems of cyclical parthenogenesis algorithm easily falling into local optimal solution and the convergence accuracy was reduced in the later period of operation.The validity and superiority of the improved algorithm were proved by testing function,traveling salesman problem.Secondly,on the basis of expert investigation and literature collection,an objective evaluation system of prefabricated structure scheme was established,and a comprehensive evaluation model based on Fuzzy Analytic Hierarchy Process(FAHP)was constructed.According to the relationship between structure and design,the template of prefabricated structure design was put forward,and the combination of structural elements was used to replace the structural scheme design,which provided a quantitative mathematical description method for the optimization of prefabricated structure design.Finally,according to a prefabricated project,three objective functions were established to minimize the overall cost of the structural scheme,to optimize the rationality of the structural stress and to maximize the adaptability of the building function,and an optimal structural scheme based on the improved cyclical parthenogenesis algorithm was obtained.The results show that the improved cyclical parthenogenesis algorithm applied in the process of prefabricated structure design improves the efficiency and accuracy of solution compared with traditional methods.The optimized prefabricated structure meets the requirements of specifications and has better economy,which has certain practical significance.