Dynamic Simulation And Optimization Of A Scissor Aerial Work Platform

Scissor aerial work platforms are widely used in construction engineering,municipal gardens,curtain wall engineering,large-scale storage,site construction and maintenance,etc.Scissor aerial work platform has the advantages of simple and convenient operation,can be used in complex sites,and runs smoothly,and is suitable for various working conditions.With the advancement of science and technology and the continuous enhancement of people’s safety awareness of aerial work,it is of great significance to analyze the kinematics and dynamics of the scissor aerial work platform.The main research contents and results of this paper are as follows:(1)According to the actual force of the scissor aerial work platform,the mechanical model of the scissor aerial work platform is established.Using the theoretical analysis result of the virtual displacement principle on the mechanical model,the thrust curve of the hydraulic cylinder is obtained.Use MATLAB software to optimize the position of the hinge point of the hydraulic cylinder.According to the established mechanical model,the force of each hinge point of the scissor aerial work platform is calculated using the moment balance method.(2)The stability model of the scissor aerial work platform under the inclined and horizontal state is established,and the stability coefficient method is used to verify that the scissor aerial work platform meets the stability requirements.(3)The whole structure of the scissor aerial work platform is analyzed by using Workbench software,and it is obtained that the point of maximum force is the reaming hole of the inner and outer scissor arms at the top level under the maximum extension state.The analysis of the inner and outer scissor arms of the bottom layer was carried out,and the size of the cross section of the scissor arms was optimized according to the simulation data,which reduced the weight of the whole machine.(4)The dynamic model of the scissor aerial work platform was established in Adams dynamic simulation software.The vibration of the rigid body model and the rigid-flexible coupling model of the scissor-type aerial work platform when subjected to impact force is analyzed separately.The analysis results show that the rigid-flexible coupling model and the rigid body model are consistent in the vibration trend,and there are certain differences in the vibration amplitude.The simulation results also prove the necessity of establishing a rigid-flexible coupling model for the platform,and the numerical values obtained from the simulation provide a reference for the design and optimization of the platform.This paper studies the scissor aerial work platform from the aspects of cost,kinematics,dynamics and stability.The results obtained have theoretical significance and reference value for the design and analysis of this type of equipment.