Vibration control of high-speed trains self-excitation under-chassis equipment by HSLDS vibration isolators

Sun, Yuwen; Zhou, Jinsong; Gong, Dao; Sun, Wei; Xia, Zhihong

doi:10.1007/s12206-018-1207-4

Cited by 21 publications

(12 citation statements)

References 16 publications

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“…Different from the design of a QZS isolator in Ref. [14], this type of mount is intended for a HSLDS mount with low positive stiffness near the equilibrium position in this research. The left and right guides are assumed to be symmetrical, and the force analysis of the left guide is used as an example, as shown as Fig.…”

Section: Design Of High Static and Low Dynamic Stiffness Mountsmentioning

confidence: 99%

“…Lee [13] proposed to apply the negative stiffness for vibration isolation of high-speed vehicles to improve ride comfort by changing structure of the bogie frame. SUN [14] proposed to connect highspeed carbody to under-chassis equipment by HSLDS components to reduce the negative impact of the excitation source equipment on the vibration of the cardbody.…”

Section: Introductionmentioning

confidence: 99%

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Study on Multi-Degree of Freedom Dynamic Vibration Absorber of the Carbody of High-Speed Trains

Sun

Zhou

Gong

et al. 2021

Preprint

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To absorb the vibration of the carbody 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 carbody, the natural vibration frequency of the MDOF DVA from each DOF can be designed as a DVA for each single degree of freedom of the carbody. Hence, a 12-DOF model including the main vibration system and a MDOF DVA is established, and the principle of Multi-DOF dynamic vibration absorption is analyzed by combining the design method of single DVA and genetic algorithm. Based on a high-speed train dynamics model including an under-carbody 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 time-domain, the vibration control performance of the MDOF DVA installed with nonlinear HSLDS mount on the carbody is analyzed. The results show that the MDOF DVA can absorb the vibration of the carbody in multiple degrees of freedom effectively, and improve the running ride quality of the vehicle.

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Section: Design Of High Static and Low Dynamic Stiffness Mountsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Multi-Degree of Freedom Dynamic Vibration Absorber of the Carbody of High-Speed Trains

Sun

Zhou

Gong

et al. 2021

Preprint

Self Cite

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“…The problems and researches about vibrations in engineering and technology fields generally consist of vibration suppression and vibration utilization. For the former, which are related to the vibration isolations, such as vibration absorbers; [1][2][3] while for the latter, one of the most important representatives is the synchronization of exciters (generally unbalanced rotors driven by induction motors separately), based on which many new vibrating machines can be invented and widely used in the industrial production process, implement the screening, cooling/drying, conveying, feeding of the materials, and so on, and more and more researchers are inspired to investigate it.…”

Section: Introductionmentioning

confidence: 99%

Stability and motion characteristics in a vibrating system with five rigid frames driven by two counter-rotating exciters

Zhang

et al. 2021

Journal of Low Frequency Noise, Vibration and Active Control

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A new dynamical model with five rigid frames (RFs), driven by two counter-rotating exciters, is proposed to explore the synchronization, stability, and motion characteristics of the system in this paper. The motion differential equations and the corresponding responses of the system are given firstly. Using the average method, the average torque balance equations for the two exciters are deduced. According to the relationship between the difference of the dimensionless effective output electromagnetic torques for the two motors and the coupling torques of the system, the theory condition of realizing synchronization is obtained. Based on the Hamilton’s theory, the theory condition of stability of the system is deduced. The stability and motion characteristics of the system for different resonant regions are qualitatively discussed in numeric, including the stable phase difference of the two exciters, relative phase relationships among the five rigid frames, amplitude-frequency characteristics, stability coefficients, and the effective load torque between the two exciters. Simulations are carried out to further quantitatively validate the feasibility of the above theoretical and numerical qualitative results. It is shown that in engineering the reasonable working points of the system should be selected in Region II, only in this way, can the synchronous and stable relative linear motion of the system with the zero stable phase difference in vertical direction be realized, and in this case, the vibrations of the four inner rigid frames (IRFs) in the horizontal direction are compensated with each other, and the energy is also saved due to utilizing the resonant effect. Based on the present work, some new types of vibrating coolers/dryers or vibrating screening machines can be designed.

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“…An effective installation method is to use rubber elastic elements to isolate the vibrations from the equipment from the carbody. Sun [1] proposed a high-static-low-dynamic-stiffness mount for connecting the UCE and the carbody, which could effectively isolate the self-excitation of the air compressor from the carbody and enhance the ride quality of the high-speed train. Gong [2] studied the influences of UCE suspension system parameters on the first-order vertical bending frequency of a high-speed EMU train carbody, and designed parameters for the UCE suspension system based on mode-matching principle.…”

Section: Introductionmentioning

confidence: 99%

Research on Multi-Point Connection of Under-Chassis Equipment Suspension System in High-Speed Trains

Sun

Zhou

Gong

et al. 2021

Preprint

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A power dispersive high-speed electric multiple-unit (EMU) train requires the installation of traction equipment under the carbody. As the speed of high-speed trains increases, the demand for traction power is increasing, and the weight and size of the equipment have increased accordingly. To adapt to the research and development of higher-speed EMU trains, this research proposes the use of a multi-point connection scheme for installing the under-chassis equipment. First, the static deflection and supporting reaction force of each hanging point are obtained based on static analysis, and it is found that increasing the number of connection points is beneficial for reducing the static stiffness requirement of each rubber element. Then, an energy decoupling degree is introduced, and an optimisation design method for the hanging point stiffness is proposed based on the energy decoupling degree and optimal vertical suspension frequency. Finally, a rigid-flexible coupling dynamics simulation model is established to analyse the vibration characteristics of the carbody and equipment after decoupling and optimisation of the multi-point suspension schemes. The research results show that after the decoupling optimisation, the vibration amplitude in the middle of the carbody is effectively reduced, and the ride quality of the carbody is improved. The difference in the number of hanging points has little effect on the vibration performance of the carbody, but increasing the number of hanging points is beneficial for reducing the dynamic supporting reaction forces of the hanging components, thereby reducing the dynamic stress of the rubber elements, and improving the fatigue resistance.

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Vibration control of high-speed trains self-excitation under-chassis equipment by HSLDS vibration isolators

Cited by 21 publications

References 16 publications

Study on Multi-Degree of Freedom Dynamic Vibration Absorber of the Carbody of High-Speed Trains

Study on Multi-Degree of Freedom Dynamic Vibration Absorber of the Carbody of High-Speed Trains

Stability and motion characteristics in a vibrating system with five rigid frames driven by two counter-rotating exciters

Research on Multi-Point Connection of Under-Chassis Equipment Suspension System in High-Speed Trains

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