A Virtual Design Of Vibration Exciter For Vibratory Roller

Roller is the main road construction equipment and it plays an important role in various compaction operations.Vibration wheel is the working device of vibration roller.Its performance directly affects the construction quality.The vibrator functions as the heart of the vibrating wheel.The vibration wheel obtains the exciting force through its high-speed rotation to achieve compaction effect.Therefore,it is very important to ensure the good function of the vibrator.In the market,one of the common faults of vibration wheels is the tearing of eccentric block in the exciter.Therefore,it is necessary to analyze the working process of the exciter in detail to find out the potential causes of the failure of eccentric block and provide the basis and direction for design improvement.In this paper,the structural analysis and modal analysis of the of the exciter’s eccentric block are carried out by using computer simulation technology and the actual working conditions of the exciter in the vibration wheel.At the same time,the collision process of the eccentric block is simulated and analyzed by using dynamic simulation software and finite element analysis software.Considering the rationality of the assembly process,the intelligent algorithm is used to solve the optimal assembly sequence of the exciter.By comparing the solving speed of the two intelligent algorithms,a more suitable intelligent algorithm is obtained.This paper covers the following issues:(1)The main parameters of fixed eccentric block and movable eccentric block are designed by studying the design theory of exciter,and their strength is checked.(2)Creo software is used to complete the assembly modeling of eccentric block and exciter assembly.The finite element analysis software ANSYS is used to simulate the structural mechanics of the eccentric block.The application of different meshing methods and their effects on the quality of the grid are carefully compared.The static and modal simulation analysis of the eccentric block is completed,which eliminates the possibility of failure caused by the structural design defects of the eccentric block.(3)When using Creo to assemble the exciter,the interference relationship between parts and the cost of changing direction and tools in actual assembly are not taken into account.Therefore,this paper uses intelligent algorithm and MATLAB to solve the optimal assembly sequence of the exciter,and obtains the optimal assembly sequence.(4)Considering that the tearing of eccentric block may be caused by frequent and high-speed collisions between fixed eccentric block and active eccentric block,Hertz contact theory is used to simulate the collision of eccentric block with small spheres.Kinematics simulation model and finite element collision model are established respectively.ADAMS and ANSYS are used to simulate the collision of eccentric block.The simulation analysis is carried out,and the simulation structure is in good agreement with the theoretical value by optimizing and adjusting the parameters.