中国舰船研究2024，Vol.19Issue(6)：25-34,10.DOI:10.19693/j.issn.1673-3185.03676
融入先验知识的轮印载荷下三跨梁最危险工况求解方法
Embedded domain knowledge method for worst-case analysis of three-span beam under multiple patch loads
罗祥云 1刘均 1江璞玉 1程远胜1
作者信息
- 1. 华中科技大学 船舶与海洋工程学院,湖北 武汉 430074
- 折叠
摘要
Abstract
[Objective]This paper seeks to solve the problem in which directly invoking an optimization algorithm for the worst-case analysis of a three-span beam structure under multiple wheel patch loads raises the possibility of falling into the local optimal solution rather than the global solution.[Method]An analys-is method comprising embedded domain knowledge with the general black-box optimization algorithm is pro-posed for the worst-case analysis of the beam.On the one hand,the position of each wheel patch load is defined as a design variable,so there is no need to specify the relative position of the group of wheel patch loads inadvance,which is more universal;on the other,by integrating knowledge of ship structural mechanics,such as"large stress resulting from the close aggregation of loads in order of magnitude,large bending mo-ment and shear force usually generated by the load in the mid span of the beam and near the support",into the optimization algorithm,a strategy for generating dangerous initial populations based on the genetic algorithm(GA)and the overall translational strategy of the wheel patch load are proposed respectively,thereby redu-cing the possibility of falling into the local optimal solution.The theoretical bending moment and shear force distribution of a three-span beam under a single wheel patch load are derived respectively.The theoretical most dangerous positions of multiple wheel patch loads are then determined by enumerating all possible com-binations to verify the correctness of the proposed algorithm.[Results]Compared with the classical method using GAs without domain knowledge and under the same computational resources,the most dangerous bend-ing normal stress and shear stress increase by 5.98%and 8.59%respectively under six wheel patch loads,and the error between the calculation results and the theoretical solution is less than 0.5%.[Conclusion]The nu-merical results show that the proposed method can accurately,stably,and quickly obtain the most dangerous load positions.关键词
知识工程/船舶设计/三跨连续梁/轮印载荷/最危险工况分析/先验知识/遗传算法Key words
knowledge-based engineering/naval architecture/three-span continous beam/wheel patch loads/worst-case analysis/domain knowledge/genetic algorithm分类
交通工程引用本文复制引用
罗祥云,刘均,江璞玉,程远胜..融入先验知识的轮印载荷下三跨梁最危险工况求解方法[J].中国舰船研究,2024,19(6):25-34,10.
