Parameter optimization method of power assembly mounting system used for heavy chassis

Abstract

The invention discloses a parameter optimization method of a power assembly mounting system used for a heavy chassis. The method comprises the steps of 1, calculating an engine excitation frequency range and a pavement excitation frequency range, thereby determining an initial inherent frequency range and an optimal frequency range of the power assembly mounting system; 2, performing modeling to obtain a mode analysis model of the power assembly mounting system; 3, performing optimization matching on mounting geometric parameters and mounting characteristic parameters; 4, calculating a currentinherent frequency of the power assembly mounting system, judging whether the current inherent frequency is in the optimal frequency range or not, and if yes, executing the step 5, otherwise, returning to the step 3; and 5, outputting the mounting geometric parameters and the mounting characteristic parameters. By optimizing the parameters of the power assembly mounting system used for the heavychassis, the vibration quality of the power assembly mounting system can be effectively improved, so that the power assembly mounting system achieves a vibration reduction effect while avoiding the resonance problem.

Description

technical field [0001] The invention relates to the technical field of powertrain suspension systems, more specifically, the invention relates to a parameter optimization method for a powertrain suspension system of a heavy-duty chassis. Background technique [0002] At present, the powertrain suspension system has the following functions: it is used to connect the powertrain and the frame, to support the weight of the powertrain, to buffer the impact caused by the uneven road surface and the vibration of the powertrain itself, and to attenuate the power Assembly vibration, and used to ensure that the power assembly does not experience excessive displacement under extreme conditions. With the continuous development of vehicle vibration reduction technology, vehicle technicians began to apply various suspension structures to heavy vehicles, and paid more and more attention to the vibration reduction quality of the powertrain suspension system. [0003] However, for the power...

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Problems solved by technology

[0004] In order to solve the existing problems of the powertrain of the heavy-duty chassis such as heavy weight, limited layout space, complex vehicle driving conditions, and harsh vibration environment, the invention innovatively uses the natural frequency of the powertrain mounting system as a judgment conditions, realize the optimization of various parameters of the powertrain suspension system, and thus complete the optimal design of the powertrain suspension system for heavy-duty chassis

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