Structure Design And Analysis Optimization Of Integrated Multi-Function Operation Vehicle

With the rapid development of the city construction,urban and rural infrastructure construction also develop rapidly,electric power rush repair,street lamp installation,billboard installation,project construction,film and television filming,equipment maintenance,municipal engineering problems more and more.However,often in many application conditions,it is necessary to use aloft work machinery and lifting operation machinery at the same time,and in many occasions,multiple equipment need to work together,which requires the versatility of auxiliary working machinery.Considering the practical needs,an integrated multi-function operation vehicle is designed.For the boom system,the theoretical calculation model and finite element simulation model are established,and the mechanical analysis,stability analysis,strength verification and modal analysis are carried out,and the structure optimization of key components is carried out based on the response surface method.Through the analysis of application scenarios and functional requirements,according to the design standards and design requirements,the specific technical parameters are planned,and a design scheme of a multi-function operation vehicle integrated with the aerial work platform and lifting function is proposed.Determine the structural form of each component of the multi-function operation vehicle,and design the operation platform,leveling mechanism,luffing mechanism and boom structure.Based on the statics analysis method,a mechanical analytical model of the boom system under the maximum operating range and height was established to solve the forces at each hinge point under the actual working conditions,which provided a template for repeatability design and laid a foundation for the subsequent finite element analysis of the boom system.And the stability of the whole machine is calculated to verify the anti-overturning of the whole machine under the most dangerous working attitude.Based on the finite element analysis method,ANSYS Workbench platform was used to conduct simulation verification on the dangerous telescopic boom system and folding boom structure with the greatest stress in the whole machine,study the static and dynamic characteristics under dangerous working conditions,obtain the stress distribution of key components under two working conditions,extract the first 6 vibration modes,and analyze that the structure meets the strength requirements.There will be no resonance,verifying the rationality of the design.Then the weak link and the optimized space are found to provide the basis for further structural optimization.Based on the response surface method,the crane telescopic boom structure with optimization space was optimized.According to the central composite test design method,the system response model of the boom was established,the sensitivity of the structural target parameters to the design variables was studied,and then the optimal parameter solution set was obtained,and the optimization results were verified.The results show that the quality of the boom is reduced by 20.97%and the utilization rate of materials is improved,which provides an important theoretical reference for practical production.