Finite Element Analysis And Structural Lightweight Design Of Flip Gate For Irrigation District

The shortage of water resources is a serious problem in China.Agricultural water accounts for 70%of the total water consumption in our country,and water use efficiency in the canal irrigation area is only 30%to 40%.Compared with 70%to 90%of developed countries,water waste is more serious.Therefore,the implementation of measurement management in agricultural irrigation is an effective way to improve the utilization rate of agricultural water resources in China.The flip gate can monitor and control the water flow by adjusting the opening angle of the gate,and ensure the flow state is free flow.Therefore,the measurement accuracy of the gate type is high,which is suitable for the application in agricultural irrigation engineering.At present,the flip gate of China's channel irrigation area is mainly imported from Australia,its cost is high,the installation and use conditions are harsh.Therefore,the localization of flip gates is imminent.In this paper,finite element analysis and structural lightweight design of two types of flip gates in the Yellow River Diversion Project in central Shanxi are carried out.Firstly,according to the structural characteristics of the flip aluminum alloy gate,aiming at reducing the weight of the gate,the parametric finite element modeling and analysis is carried out by using the APDL parametric design language,and the lightweight design of the structure is carried out by ANSYS.In this paper,the optimization method of the flip aluminum alloy gate is to combine the random method,the search method and the first-order method in the ANSYS optimization module to generate a combined optimization algorithm.The method has strong global search ability in the early stage of optimization.In the later stage,it has good local optimization ability.The optimization results show that the combination optimization algorithm has better optimization effect and less time than the traditional optimization method.Eventually,the weight of the flip aluminum alloy gate is reduced by 13%,and meets the strength and stiffness requirements of the gate.For flip steel gate,also for the purpose of reducing the weight of the gate,but the optimization of the method is selected for the current application of a wide range of genetic algorithm(GA)and bidirectional evolutionary structure optimization(BESO).In this paper,the implementation of genetic algorithm is the joint application of modeFRONTIER multi-objective optimization software and ANSYS;In addition,due to the oscillation phenomenon and the checkerboard phenomenon is the BESO method,this paper improves the traditional BESO method by using the bidirectional evolutionary structure optimization method based on artificial materials and the sensitivity first-order redistribution method,and forms an improved BESO method,and uses the secondary development function of ANSYS to write the corresponding program.Through the test of classical examples and the application of flip steel gates,the improved BESO method embodies its feasibility,effectively restrains the defects in the traditional BESO method.The weight of the optimized flip steel gate is reduced by 27%,and meets the strength and stiffness requirements of the steel gate.