Optimization Design Of 003056F Model Engine Hydraulic Mounting System

The NVH performance of the car is one of the vehicle performances that the current vehicle purchaser pays more attention to.The NVH performance of the vehicle is mainly the control ability of the vehicle in vibration reduction and noise reduction,and the engine mounting system has greater vibration and noise to the whole vehicle.The engine is the main vibration source in the car.The mounting system is the device that connects the car body and the engine.It can be seen that the performance of the suspension system is important for the vibration and noise reduction of the whole vehicle.On the one hand,the higher stiffness of the mounting system helps to limit the displacement during engine operation.On the other hand,the stiffness of the suspension system should be as small as possible to reduce the vibration transmitted from the engine to the vehicle body.So optimized design can make the mounting system have a better solution on above two aspects.In this context,this paper takes 003056 F model engine hydraulic mounting system as the research object,optimizes it to enhance its resistance.Vibration performance,improve vehicle NVH performance,the main research contents of this paper are as follows:1)Combining the domestic and international technical status of hydraulic suspension system optimization,the principle and basic structure of the engine hydraulic suspension system and the analysis method are deeply studied and analyzed,and the hydraulic suspension system of the 003056 F engine powertrain is determined.The stiffness parameter is optimized by decoupling method,so that its decoupling state is optimized to improve its anti-vibration performance.2)The model of 003056 F engine hydraulic suspension system is completed.The mechanical model and the parameter calculation model of the suspension system are given.Based on the model,the method of experimentally measuring the parameters is designed and given.The measurement principle is completed,the design of the parameters of the engine hydraulic suspension system is completed,the objective function and constraints of the engine hydraulic suspension system are determined,and the design of the engine suspension system optimization scheme is completed based on the ADAMS platform.The design and construction of the 3D optimization model is given.3)Based on the ADAMS platform and the optimized model scheme of the design,the model optimization of the hydraulic suspension system is completed.The stiffness value and related parameters of the hydraulic suspension system model are determined,and then the external characteristics of the engine,the force in all directions and The three aspects of the seismic performance of the optimized hydraulic suspension system were simulated and analyzed.The simulation tools provided by ADAMS were used to simulate the external characteristics and analyze the stress conditions.After the optimization of the dynamic characteristics simulation analysis,the comprehensive performance simulation of the model is evaluated from the two aspects of stiffness and lag angle.The simulation results show that the design of the model parameters meets the design requirements of the engine mount and has Good performance.4)The engine hydraulic suspension dynamic characteristics test analysis was carried out.Based on the parameters of the simulation model output,the 3D model of the prototype was completed,and the prototype was produced into production drawings.The prototype test environment was built.The experimental test of the engine hydraulic suspension sample was carried out.Finally,the data analysis model was used to calculate the dynamic and lag angle parameters of the sample during the engine test according to the test parameters,and compared with the model simulation.The change trend of the lag angle is basically the same,and the dynamic error is within 10%,which verifies the correctness and feasibility of the model optimization scheme design.