Structure Analysis And Parameter Optimization Of Lift-sliding Stereo Garage

With the increasing of car ownership,the problem of parking is becoming more and more difficult.Stereo garage relieves the contradiction between the tight urban land and the shortage of parking spaces.People are more inclined to buy SUV recently,but the existing stereo garage for SUV is inadequate.Therefore,this paper put two layers lift-sliding stereo garage which is suitable for medium or large SUV as the research object to delve deeper.Firstly,the overall layout of two layers lift-sliding stereo garage suitable for parking large SUV is studied.Then the overall size of stereo garage,the structure of loading plate and the transmission system are designed.Secondly,a three-dimensional model of loading pallet is estabilshed with SolidWorks,then the static analysis was made in the ANSYS software.The results indicate that the strength and rigidity of the loading pallet can meet the requirement.The influence of lifting load at different lifting positions in the loading plate is studied,the appropriate lifting position is selected and the accurate lifting load is obtained,which would lay the foundation for the finite element analysis for overall steel structure.Thirdly,the beam element(BEAM 189)model of steel frame structure of stereoscopic garage is set up.Then five working conditions of the model are simulated and analyzed.The results show that the previous specifications of the steel do not meet the design requirements of the stereoscopic garage.Therefore,the sequence quadratic programming method is concerned to take the structural strength and stiffness as the optimization conditions,then the specification of the section steel is re-selected.The eigenvalue buckling analysis,geometrically nonlinear buckling analysis and double nonlinear buckling analysis are used to study the stability of the re-selected specification of steel structure.The analysis results show that the stability of the optimized structure meets the requirements.Finally,a solid element(SOLID 186)model of the completed longitudinal beam is established to study the torsional deformation caused by asymmetric loading.The effect of four kinds of strengthening structures on improving the torsion of longitudinal beam is compared.The reasonable structure strengthening method is given,and the size parameter of the strengthening structure of the longitudinal beam is optimized.The results show that the torsional deformation of the steel structure of the stereoscopic garage under the unsymmetrical loading has been greatly improved.