Design And Analysis Of Three-dimensional Platform For The Construction Of Middle And Low-rise Steel Structure Prefabricated Buildings

Improving the level of mechanization,automation,intelligence,networking and informatization in the building construction process is the focus,difficulty and development direction of current research in the field of building construction.For the construction of high-rise and extra-high-rise buildings,advanced construction methods such as special building machines have been developed at home and abroad.Due to the constraints of low capital investment and short construction time for medium and lowrise buildings,there has not been developed an automatic construction that is fully suitable for medium and low-rise buildings.equipment.In order to meet the construction work requirements of low-rise steel structure prefabricated buildings,considering the economic factors in the construction process and the convenience of assembly and disassembly,this project intends to build a three-dimensional space platform that can transport materials freely in vertical and horizontal planes.The platform adopts modular design,the connection of each module is safe and reliable,and it can be quickly disassembled and assembled,so as to be suitable for the construction process of different styles of buildings.The mobile platform loaded with materials can move freely and quickly on the platform track,and can be locked at any time.It can be equipped with various special industrial robots for welding,riveting,indexing and spraying operations during the construction process,so as to realize the mechanization and automation of building construction.The main research contents of this paper are as follows:(1)Structural design of the three-dimensional platform.Combined with the characteristics of the actual working environment of the middle and low-rise steel structure prefabricated buildings,the relevant parameters of the three-dimensional platform are determined,and the structural design of the vertical material lifting system,the horizontal diamond track components,and the core device of the mobile platform is completed.(2)Simulation analysis of virtual prototype of three-dimensional platform.Use Adams software to simulate each part of the three-dimensional platform,and carry out kinematics and dynamics analysis to obtain the change curves of displacement,velocity,acceleration,force and torque of important components,verify the rationality of the mechanism design,and extract the maximum force and torque.numerical value.(3)Finite element analysis of three-dimensional platform.Use Workbench software to carry out finite element simulation of important parts of the threedimensional platform,and carry out static and dynamic analysis.Perform transient dynamic analysis on the wire rope transmission system,mobile platform wheel system,gear and rack meshing and other mechanisms respectively,and perform static analysis on the track mounting seat and diamond track.Through transient dynamics and statics simulation,zero the maximum stress and maximum deformation of the component are verified to verify whether the strength and stiffness of the three-dimensional platform meet the design requirements.(4)Lightweight design of diamond track.The multi-objective optimization of the diamond track is carried out by using the response surface optimization method,the design variables and optimization objectives are determined,the design variables are optimized by parameter correlation analysis,the establishment of the response surface model is completed by the OSF test method combined with Kriging,and finally the MOGA algorithm is used to complete the diamond track.Response surface optimization,the weight loss ratio reached 9.8%.According to the optimization plan,the size of the mobile platform is adjusted accordingly,and the finite element analysis of the adjusted component structure is carried out again,which proves that the optimized components meet the design requirements and achieve the lightweight design goal of the diamond track.