Design And Analysis Of Lifting Platform System With Large Stroke And Heavy Load

In this paper,through the in-depth study and analysis of the working environment and technical requirements of the lifting system,a large-scale heavy-duty lifting system is designed and developed in accordance with the actual requirements.The lifting system uses the hoisting device as the lifting power source,which not only solves the complexity of the rack and pinion lifting technology,but also ensures the vertical and horizontal accuracy of the heavy lifting system.According to the requirements of the overall design technical indicators,the overall scheme of the large haul heavy lift platform system is demonstrated,and the principle and scheme of the whole system are elaborated in detail.According to the rationality of the scheme design,the main structure is installed in the upper and lower parts respectively,and the effective space is reasonably used to realize the functional requirements of the whole machine.The model of the mechanical part of the whole machine system is built by using CREO,and the drawing is done by CAD.The static analysis of the whole system is carried out under different working conditions,and the force of each key component is obtained,which provides a theoretical basis for the design of the structure and the selection of components.The finite element modeling of the whole machine and lifting platform is carried out by using ANSYS,and its static characteristics are analyzed.The structural deformation nephogram and stress nephogram under different working conditions are obtained.The static analysis of ANSYS is performed to verify whether the structure meets the requirements.Mathematical model of the trajectory of the system is established,and the trajectory and motion parameters are optimized.During the dynamic modeling of the multi degree of freedom(DOF)discrete system in motion,the vibration equation and solving equation of natural frequency in motion are established respectively by Lagrange equation.The multi DOF discrete system model is established by using ADAMS.Through simulation analysis,the trajectory curve of the system and the varying curve of lifting tension in the process of motion are obtained.The modal analysis of the whole machine model is completed by using ANSYS,and the first 6 order vibration modes and the natural frequency of the whole model are obtained.By analyzing the natural frequency,the system can avoid resonance caused by vibration of the same frequency.A lifting platform model with numerical simulation technology is built.Flow field is established using the Fluent module in ANSYS and with the combination of static field simulation analysis of fluid solid coupling,field stress nephogram after interaction between them are obtained.According to the equivalent principle of the flow field force,the transient dynamics of the platform is simulated and analyzed,and the curves of stress and displacement nephogram and their changes are obtained.Through the analysis of ANSYS simulation results,we can ensure that the platform can work under impact load.