Automotive Powertrain is the main excitation source isolated powertrain mounting system is used between the powertrain and chassis vibration, the advantages and disadvantages of the system performance is directly related to the vibration of the powertrain to the car body pass the size of the comfort of the vehicle has an important effect. With the development of Hyundai Motor, has been unable to meet ordinary rubber mount vehicle powertrain mounting system requirements. In recent years, hydraulic mount has been more widely used, it is compared with the rubber mounts, vibration isolation performance in a certain improvement. In this paper, the main hydraulic mount rubber spring for the study. First, the structural analysis of the hydraulic suspension and damping mechanism, this paper, the simplification and reasonable assumptions, the establishment of a "mechanical - hydraulic" hybrid complex mathematical models, the model considered the pre-load inertia of the liquid flow and channel shape oscillationand other factors, the addition of the non-linear factors and increase the accuracy of the model. Based on this model, the matlab / simulink developed a dedicated simulation software, the simulation study discussed the parameters of rubber spring mount the main dynamic characteristics. Secondly, the use of finite element analysis software ANSYS to establish a rubber finite element model of the main spring, main spring on the dynamic properties of rubber simulation. Finite element analysis taking into account the process of element type, mesh density and the degree of accuracy of the results, so pay attention to select the appropriate cell type, and the large deformation area of the grid density. Rubber article characterized by the dynamic characteristics of the main spring with the main spring rubber dynamic stiffness and phase angle of these two parameters.Finally, based on the finite element model of the rubber main spring is optimized.Dynamic characteristics of the optimized parameters of a certain improvement mount, that mount in the low frequency vibration isolation performance is improved.
Key words: hydraulic suspension, finite element, vibration, noise, optimization
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