Optimization Design And Multi-body Dynamics Analysis Of Boom Of Overhead Working Truck

Overhead Working Truck is a special kind of engineering machinery and equipment,can ship the working staff and equipment to arrive at the specified height.At present,the overhead working truck using scope is expanding constantly,at the same time in order to meet the requirements in the actual engineering,the various performance of Overhead Working Truck is also becoming better and better.The boom is the main components of Overhead Working Truck,its performance largely determines the performance of the Overhead Working Truck in such situation,the development of research on the mechanical behavior of the Overhead Working Truck's boom has becomed the key research content in the field of mechanical engineering design.Taking CSC5060JGKJH16 which has 16 meters folding boom type Overhead Working Truck as the research object,firstly Inventor software is used to establish the Overhead Working Truck boom system of three-dimensional models,and established three-dimensional model into ANSYS,then we select the maximum working radius and the maximum working height,both are most dangerous working conditions,After dividing the grid and applying the load,we analyzed the operating mode of the two kinds of static strength and stiffness of boom structure and obtained the two assignments arm stress distribution under the condition of stress,strain distribution and dangerous parts,analysis results showed that the static strength of static stiffness of boom structure met the requirements;Then we pointed the total mass of the boom structure as optimization goal and thickness of each boom,ear plate,connecting plate as the design variables,the boom in both strength and stiffness met the requirements under the premise of structure optimization design was carried out on the boom.Optimized operating boom was reduced weight 128.063KG,achieving the goal of boom lightweight.At the same time we used the 'MATLAB' optimization toolbox to optimize the single cylinder luffing mechanism of three hinged point which was maked up by lower arm,turntable,and lower arm cylinder,result showed that the optimized luffing cylinder stress was reduced by 14.01%.Next,on the basis of the theory of Multi-Body dynamics,optimization is established after the boom of the mathematical model of rigid arm frame system,kinematics analysis was carried out on the boom,and dynamics analysis software ADAMS to boom from one position to another position,dynamics simulation analysis based on the analysis of the all levels of the movement of the arm frame is obtained parametric curves,at the same time it can be concluded that the stress curve of transformer oil cylinder through these curves,we can analyze the boom system under the rigid module movement performanced well,starting and braking are very smooth,terminal position movement is relatively smooth and safe without shaking.Finally basic on the theory of multi flexible body system dynamics optimization after the boom of dynamics analysis,the rigid and flexible body parameters was obtained to boom the impact of the use of ANSYS-ADMAS joint simulation analysis,we got the curve of boom flexible deformation corresponding to all parameters of boom system,analysis suggested that the flexible deformation of boom structure caused different level vibration phenomenon on all parameters of boom system comparing with the preceding chapter rigid-body dynamics,it was concluded that the flexible deformation caused great effection which cannot be ignored to the boom system.