Study the Effect of Elastomeric Isolator Damping Factor in Vibration Using Numerical and Experimental Analysis

In recent days the usage of Electro - Hydraulic Control Unit (EHCU) is increased acutely in light passenger vehicle applications apart from the passenger cars. The main advantage of using electro - Hydraulic control unit (EHCU) is operational flexibility, consistent performance customization, increase durability and lower running cost. During running, the mechanical load is converted into the electronic signal by using transmitter. The electronic devices are highly responsive when compared with mechanical devices, so, it is necessary to reduce the Noise, Vibration and Harshness (NVH) in the system. As per the recent trend, the NVH pollution should be as low as possible in the vehicle. It is necessary to maintain the NVH in minimum level in the electronic device to meet the overall performance of the system. The vibrational isolator is one of the key components used in Electro – Hydraulic Control Unit to reduce the noise and vibration implication of the system. The process of using vibration isolator with hyper-elastic material is highly nonlinear dynamic and complex in nature. It acts as an insulation between EHCU and external system. In this study, vibration characteristics of the EHCU is determined using Finite Element Analysis (FEA) considering rubber isolator which is made up of hyper-elastic material. In this study there are two damping factors like material damping and structural damping are considered to predict the vibrational behavior of the system. Also, the results are compared with lab validation test results and the damping factors are standardized for future reference.