The Research And Development Of The Mounting Performance Test Device And The Mounting System Optimization Design

As people's ride comfort and noise pollution in the external environment requirements continue to increase, and vehicle NVH requirements are increasing, the factors that affect vehicle NVH in different conditions the main factor is different, at low speeds the engine noise and vibration is mainly, medium speed when the tire friction with the ground is based,when high speed the body and the friction of the air is mainly. This study is mainly on the vehicle NVH powertrain vibration damping and mounting systems support research and analysis.(1)establish a simplified mathematical model of the powertrain mounting system,Analysis the relationship between the structural parameters and Isolation performance in system parameters changes, mounting system against the excitation source against analyze;establish a dynamic suspended model, the mounting elements against different types of static and dynamic performance parameters through experimental device designed to measure, by the comparison of performance parameters and the measured dynamic model, you can select a suitable model for the corresponding mounting elements.(2)To measure the mounting of static and dynamic performance parameters, design Isolator static and dynamic performance parameters of the experimental apparatus to simulate actual working conditions of the mounting, measured static and dynamic performance parameters. Established in CATIA three-dimensional model, a peer selection and size of parts design and verification, according to generate engineering drawings processed kind, assemble the kind.(3)The Isolator static and dynamic performance parameters of the designed experiment static and dynamic test to design device the control system and collection system.(4)With this experimental device against mounting elements of different types of static and dynamic tests, the changes were measured force and displacement of experimental data.Obtaining the test data processed can be static stiffness, loss factor, the lag angle static and dynamic performance parameters, the experimental results were analyzed under different conditions, and the related factors can explore loading speed, frequency and amplitude against mounting elements affect the dynamic and static performance parameters, and the static and dynamic links between the parameters.(5)Using the powertrain mounting system model analysis and structural parametersmeasured, write mounting system optimized structure parameters in MATLAB / GUI, and obtain the optimal solution under multiple constraints. Using the designed bench against the different types and models of mounting elements static and dynamic experiments, select the measured performance parameters to meet the requirements of the mounting type. The mounting elements may also be utilized, and experimental measuring designed device to verify the mounting of performance parameters and want to achieve consistent performance.