Vibration Isolation Performance Analysis And Optimization Of A Radar Vehicle Power Generation Tank

Internal combustion engine was born for more than a century.Its high thermal efficiency and strong power output to make it widely used with vehicles,ships,trains,power generation and all kinds of mechanical equipment.In output power at the same time,the internal combustion engine bring large vibration and noise which reduce the service life and reliability of the mechanical equipment,at the same time affect the ride comfort.Due to the rough working process of the engine of the generator car,the vibration and noise is too bad to tolerate.In the process of matching with electronic cabin,the large vibration acceleration affects the service life of electronic devices,and discomfort the staff in the electronic cabin.To solve this problem,this thesis combine the method of simulation and experiment,finish the generator suspension optimization design,simulate and optimize the acceleration of the relevant parts.This thesis expounds the vibration isolation technology of some structure and meaning in different aspects,and provides a train of thought of the practical method to improve the vehicle harshness(NVH)(noise vibration and harshness)performance.In specific research process,established the generator mount system model which considering the stiffness of the base in ADAMS,and optimized the stiffness of the mount system which makes the decoupling rate and inherent frequency distribution as the objective function.Main work includes the following aspects:By the generator mount system vibration experiment and mount system stiffness experiment,obtain suspended active lateral passive lateral vibration acceleration,and the stiffness of mount system,calibrate the excitation of the generator mount system model.Measured the vibration acceleration of the generator tank in working conditions to obtain the frequency distribution characteristics of vibration transfer path.Build the rigid-flexible model of the generator mount system.With the decoupling rate and the energy of the system natural frequency distribution as the objective function,optimize the stiffness of mount system.Power station tank,electronic tank and frame finite element model is established.Calculate the constrained mode of power station tank,electronic cabin and frame,and the freemode of the frame,at same time,to check whether any resonant frequencies exist.With the active acceleration of the optimized mount system as the excitation,finish the power tank,electronic cabin and frame frequency response analysis to obtain the vibration characteristics of electrical ceiling and bulkhead.Combined with practical engineering experience,optimize the vibration transmission path,platform,named deck,pad and absorber.The simulation results compared with the experimental data.Through the optimization of suspension and vibration path,obtained the good effect of vibration isolation.Through the optimization of vibration isolation,the vibration acceleration of generator tank cabin fell by 42.03% on average.This thesis combined the optimization of mount system and Finite element analysis,reduced the vibration acceleration of the target response point,which has high engineering value.By means of optimization method and the research to improve the container type vehicle vibration isolation performance provides a train of thought.