Method for optimizing smoothness of whole vehicle by utilizing liquid resistance suspension

Abstract

The invention belongs to the technical field of vehicle driving smoothness, and relates to a method for optimizing smoothness of a whole vehicle by utilizing liquid resistance suspension. The method comprises the following steps: 1, establishing a whole vehicle smoothness optimization mechanical model containing the liquid resistance suspension; 2, on the basis of the mechanical model, calculatingthe suspension vibration inherent frequency, and combining a suspension parameterization characteristic equation to derive a vehicle smoothness optimization target equation; and 3, verifying the feasibility of the method through simulation and an actual sample piece, and adjusting the key structure parameters of the liquid resistance suspension to realize the optimal solution meeting the target equation. The method takes the power assembly suspension system comprising the liquid resistance suspension as a damped vibration absorber, so that the combined design of the liquid resistance suspension and the vehicle suspension is realized; a mathematical model containing the liquid resistance suspension and the vehicle body is established, and the structural parametric design of the liquid resistance suspension with the vehicle body vibration acceleration as the optimization target is achieved; and under the same external input, the peak acceleration of the vehicle body is reduced, and theriding comfort of the whole vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle ride comfort, and relates to a vehicle ride comfort optimization system and method using fluid resistance suspension. Background technique [0002] The powertrain mount system with hydraulic mount as the core is the most important system for the vibration comfort of modern automobiles. For a long time, the design matching of automotive suspension systems has been designed at the system level, that is, considering the interaction between the powertrain and the suspension, while setting other parts of the vehicle as fixed. Although this mounting matching design method can obtain a relatively ideal isolation and attenuation effect on powertrain vibration, since the body is set to be stationary during design, this matching method cannot take into account the fact that the body is actually excited by the road surface. And through the vibration transmitted by the suspension, it is impossible to conside...

AI Technical Summary

Problems solved by technology

Although this mounting matching design method can obtain a relatively ideal isolation and attenuation effect on the vibration of the powertrain, since the body is set to be stationary during design, this matching method cannot take into account the fact that the body is actually excited by the road surface. And the vibration transmitted by the suspension, so it is impossible to consider the vibration of the powertrain suspension system and the chassis at the same time, and design matching

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