Structural Analysis And Optimization Research Of The Box Main Girder Of Aqueduct Hoisting Machine Based On ANSYS

For the reasons of geography,climate,the river network density is large and the water resources are abundant in the south of China,while they are few and scare in the north area,thus it shows that the distribution of water resources is extremely unequal in China.In order to solve the problem of lack of water resources in northern China,the country has implemented a series of projects,such as the South-to-North Water Transfer Project,the Water diversion project in Northern Hubei,etc.In the water diversion project,large aqueduct is need when Water diversion channels go though in the air or underground.In this paper,the aqueduct hoisting machine is a necessary equipment in aqueduct construction.The machine is mainly used for the transportation,installation and erection of the aqueduct,as well as the transfer and reorganization of the slot machine.The aqueduct hoisting machine plays an important role in the construction of the aqueduct,but it's large weight will not only increase the cost of production,but also cause the transportation inconvenient.Therefore,it is necessary to study the optimization of the machine.In this paper,the ME650+650 type aqueduct hoisting machine as the research object,the ANSYS software and finite element theory are used to optimize the structure of the main girder in the aqueduct hoisting machine.First of all,the mechanical model of the main girder in ME650+650 aqueduct hoisting machine was established,analyse the main girder under dangerous condition for mechanics.Secondly,the main girder of the aqueduct hoisting machine was modeled based on the ANSYS software,and the static analysis of the main girder in the aqueduct hoisting machine was completed based on the verification of the mechanical model.Thus the stress distribution nephogram and strain nephogram were obtained.The results showed that the strength of the local structure was insufficient in some cases,so the reinforcing ribs were arranged on the strength inadequate locations of main girder in the aqueduct hoisting machine,which was verified that the strengthening of the main girder structure could meet the requirements.Thirdly,according to the analysis results,optimize the structure of the improved main beam by changing the parameters of the box girder section.The optimal design sequence was obtained through optimization,and the verification of the optimal design sequence was completed.After optimization,the volume of the main beam could be reduced by 13%,as a result,the manufacturing cost was reduced.At last,analyse the dynamic characteristic of the main girder in aqueduct hoisting machine based on the block of the elevator,extract the first six order modal frequencies.The results show that the vibration of the main girder is mainly bending and local deformation of the web,and the main vibration serious part is the web.In this paper,ANSYS software was used to analyze and optimize the structure of the main girder in ME650 + 650 aqueduct hoisting machine.The results showed that the weight of the main beam was reduced,the cost was reduced,the market competitiveness was improved,and the reference was provided for the design of the same type of products.