Study on multi-degree of freedom dynamic vibration absorber of the car body of high-speed trains
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Published:2022-03-17
Issue:1
Volume:13
Page:239-256
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ISSN:2191-916X
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Container-title:Mechanical Sciences
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language:en
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Short-container-title:Mech. Sci.
Author:
Sun YuORCID, Zhou Jinsong, Gong Dao, Ji Yuanjin
Abstract
Abstract. To absorb the vibration of the car body of the high-speed train in
multiple degrees of freedom, a multi-degree of freedom dynamic vibration
absorber (MDOF DVA) is proposed. Installed under the car body, the natural
frequency of the MDOF DVA from each DOF can be designed as a DVA for every
single degree of freedom of the car body. Hence, a 12-DOF model including the
main vibration system and an MDOF DVA is established, and the principle of
Multi-DOF dynamic vibration absorption is analyzed by combining the design
method of a single DVA and genetic algorithm. Based on a high-speed train
dynamics model including an under-car-body MDOF DVA, the vibration control
effect on each DOF of the MDOF DVA is analyzed by the virtual excitation
method. Moreover, a high static and low dynamic stiffness (HSLDS) mount is
proposed based on a cam–roller–spring mechanism for the installation of
the MDOF DVA due to the requirement of the low vertical dynamic stiffness.
From the dynamic simulation of a non-linear model in the time domain, the
vibration control performance of the MDOF DVA installed with a nonlinear
HSLDS mount on the car body is analyzed. The results show that the MDOF DVA
can absorb the vibration of the car body in multiple degrees of freedom
effectively and improve the running ride quality of the vehicle.
Funder
National Natural Science Foundation of China National Postdoctoral Program for Innovative Talents China Postdoctoral Science Foundation
Publisher
Copernicus GmbH
Subject
Industrial and Manufacturing Engineering,Fluid Flow and Transfer Processes,Mechanical Engineering,Mechanics of Materials,Civil and Structural Engineering,Control and Systems Engineering
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