Structural Design And Optimization Research Of Collapsible Lifting Mechanism For Vehicular High-altitude Tile Equipment

In recent years,with the wide application of steel structure building in the field of architecture in our country,the designer has developed vehicular high-altitude tile equipment used for pressing and transmitting color steel tiles.This equipment can work in complex environment,and it can well replace the traditional manual transmission and laying of color steel tile,which greatly improves the efficiency and quality of the construction of steel structure building,so it has been widely concerned in the industry.However,this new equipment has no standardized and systematic design and production in the domestic market,it needs to be designed and analyzed systematically.Collapsible lifting mechanism is the core part of the device.Its parameters and reliability directly affect the performance of the whole equipment.Therefore,the research on its performance and reliability is the focus of research.In this paper,the structural design and optimization of the collapsible lifting mechanism are studied according to the working requirements of the vehicular high-altitude tile equipment.The main contents are as follows:1.This paper introduces the structure and function of the vehicular high-altitude tile equipment and the collapsible lifting mechanism,analyzes the research methods and research status of the domestic collapsible lifting mechanism,and illustrates the research significance and main research contents of this paper.2.As for the part of structural design: Firstly,the general layout of the collapsible lifting mechanism is completed according to the work requirements of the vehicular high-altitude tile equipment.Secondly,the static analysis and calculation of the collapsible lifting mechanism were carried out,and the structure design of the main components was completed based on the calculation results.In the end,the three-dimensional model of the collapsible lifting mechanism was established by using Pro/E software and completed the assembly analysis.3.As for the part of dynamic simulation analysis: Firstly,dynamic simulation analysis model of collapsible lifting mechanism is established based on ADAMS.Secondly,The dynamic simulation analysis is carried out on two typical working conditions of 8m and 16 m,which verify whether the design results satisfy the requirements of the work.In the end,compared the simulation values and calculated values of hydraulic cylinder under two typical working conditions,the selection of hydraulic cylinder is determined,which is the basis for subsequent optimization design.4.As for the part of optimal design: Firstly,the dynamic performance of the collapsible lifting mechanism is optimized according to the calculation result of the force of the hydraulic cylinder.The optimization design mathematical model takes the position parameter of hydraulic cylinder hinge point as the design variable,and its objective function is to reduce the maximum working pressure of the hydraulic cylinder and improve the hydraulic pressure stability.The optimization results are obtained by using the genetic optimization algorithm toolbox of MATLAB,and the effectiveness of the optimization results is verified in the ADAMS.Secondly,the Workbench is used to optimize the shape of the section of the telescopic boom to improve its stiffness and reduce quality.5.As for the part of static analysis: Firstly,the dangerous working conditions of the telescopic boom,push rod and connecting rod of the balancing mechanism are determined according to the simulation results of ADAMS dynamics.Secondly,the maximum deformation and stress of main components under dangerous conditions are obtained by static simulation of Workbench.According to the requirements of stiffness and strength,the rationality of the structural design is verified.6.As for the part of dynamic characteristic analysis: Firstly,the modal analysis of the telescopic boom is carried out which including vibration mode and natural frequency.Secondly,the displacement response of the telescopic boom under two transient loads is obtained by the transient dynamic analysis of Workbench.