Study on the vibration isolation performance of an open trench–wave impedance block barrier using perfectly matched layer boundaries

Zhou, Fengxi; Zhou, Zhixiong; Ma, Qin

doi:10.1177/1077546320976962

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…Sarka et al [10] investigated the efficiency of using sand crumb rubber mixture for vibration isolation. Zhou et al [11] found that the vibration isolation performance of the open trench-wave impedance block barrier system can reduce the vibration generated by a vibration source. 3D FEM model was constructed by Kontoni et al [12] to study the train-induced vibrations on a nearby high-rise building.…”

Section: Introductionmentioning

confidence: 99%

Study on the Application of Vibration Isolation by Using a Trench in Frame Structures

Guan¹,

Ma²,

Zhang³

et al. 2023

Structural Durability &Amp; Health Monitoring

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An isolation trench is a simple and effective method to isolate structural vibrations originating from sources of vibration other than earthquakes (machines, traffic, explosions, etc.); however, there is still not a conclusive depth of the isolation trench for frame structures. To investigate the isolation effect of a trench in the frame structure designed for ground vibration, both a field test and finite element analysis were conducted to analyze the reduced effect of the vibration. The vibration reduction analysis was based on the dynamic equation and wave theory. Considering the vibration control of an industrial plant frame, a soil-trench-building finite element model was built to analyze the vibration characteristics of the floor before and after the open isolation trench structure was used. According to the model, a dynamic test was carried out on the frame structure to assess the effect of the vibration reduction by introducing the trench. The results showed that the depth of the trench was the dominating factor in vibration isolation. When the depth of the trench reached 1~1.3 times the wavelength of the Rayleigh wave, the damping effect was the strongest. the width of the trench has little effect on the vibration isolation efficiency, and the trench must be maintained at a certain distance from the building to ensure the vibration damping efficiency. The vibration of each floor was obviously reduced after the trench was built. The vibration damping effect of the trench was significant.

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Section: Introductionmentioning

confidence: 99%

Study on the Application of Vibration Isolation by Using a Trench in Frame Structures

Guan¹,

Ma²,

Zhang³

et al. 2023

Structural Durability &Amp; Health Monitoring

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show abstract

“…Xu et al (2019), Zhou et al (2016), and Jiao et al (2018) analyzed the vibration isolation effect of the WIB made of geofoam sandwich and concrete-water-concrete composite vibration isolation barrier, and proved that the combined vibration isolation effect was better than that of single-layer WIB. Zhou et al (2020) analyzed the vibration isolation effect of the open trench-WIB barrier, the results show that the open trench-WIB barrier combines the advantages of the open trench and the WIB, and can effectively control the ground vibration.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of P1 wave passing through a double-layer wave impeding block in the unsaturated soil

Shu

2022

Journal of Vibration and Control

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Based on the propagation theory of elastic waves in unsaturated porous medium and single-phase elastic medium, the calculation model of a double-layer wave impeding block (WIB) as vibration isolation barrier in unsaturated soil foundation is established. The analytical solution of the transmission/reflection amplitude ratio of P1 wave passing through a double-layer WIB in unsaturated soil foundation are derived by Helmholtz vector decomposition theorem. The influences of physical and mechanical parameters such as saturation, wave impedance ratio, density, and shear modulus on the vibration isolation effect of the double-layer WIB when P1 wave passing through the double-layer WIB in the unsaturated soil foundation are analyzed by parametric studies. The results show that the saturation has a small effect on the transmission/reflection coefficients of P1 and S waves and a significant effect on the transmission/reflection coefficients of P2 and P3 waves. The wave impedance ratio and the shear modulus and density of the double-layer WIB have a significant effect on the transmission/reflection coefficients. The optimal shear modulus and wave impedance ratio of the double-layer WIB can be selected to obtain the best vibration isolation effect, which provides theoretical guidance for the application of the double-layer WIB in the field of unsaturated ground vibration control.

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“…Herbut (2020) research on the vibration isolation effect of the open trench by finite element method from the view of reducing the vertical and horizontal components of vibration, the vibration isolation effect of the open trench on horizontal displacement is better than that on vertical displacement. Zhou et al (2022) present a novel wave barrier (open trench-wave impedance block barrier) by considering the respective advantages of the open trench and wave impedance block. The novel wave barrier has a better isolation effect for the vibration in the low-frequency range through finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Time-domain analysis for the scattering of plane elastic waves in half-space with an open trench

Liang

Zhou

Cao

et al. 2022

Journal of Vibration and Control

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In this paper, the scattering and vibration isolation of elastic waves from the open trench are analyzed and discussed in the time domain using the scaled boundary finite element method (SBFEM). Based on the theory of soil-structure interaction, the site with an open trench is decomposed into a near-field system and an infinite far-field system. The quadtree domain decomposition technique is employed for SBFEM mesh discretization of the near-field. The far-field is rigorously modeled by the displacement unit impulse response matrix. The obliquely plane elastic wave from the far-field is converted into a traction force acting on the near/far-field boundary. The time-space domain numerical model is established for elastic wave propagation in half-space with an open trench. Finally, through numerical examples to verify the effectiveness of the method of this paper, and parametric analyze the effect law of the incidence angle and the trench depth, etc., on the vibration isolation performance.

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Study on the vibration isolation performance of an open trench–wave impedance block barrier using perfectly matched layer boundaries

Cited by 7 publications

References 24 publications

Study on the Application of Vibration Isolation by Using a Trench in Frame Structures

Study on the Application of Vibration Isolation by Using a Trench in Frame Structures

Theoretical study of P1 wave passing through a double-layer wave impeding block in the unsaturated soil

Time-domain analysis for the scattering of plane elastic waves in half-space with an open trench

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