Analysis of Isolation Ground Vibration by Graded Wave Impeding Block under a Moving Load

Ma, Qin; Zhou, Fengxi

doi:10.1155/2018/4989584

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Besides, Jiang et al [46] found that WIB could achieve better performance in layered ground but the increased depth of stiffened block has little effect on the improvement of the performance, which should be considered in the design period. It was found that WIB can suppress the ground vibrations between 6 and 8 dB in a low-frequency range (<30 Hz) [47,48].…”

Section: Wave Impeding Blocksmentioning

confidence: 99%

Sustainability of Vibration Mitigation Methods Using Meta-Materials/Structures along Railway Corridors Exposed to Adverse Weather Conditions

Kaewunruen

Qin

2020

Sustainability

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Noises and vibrations caused by operating transport systems can seriously affect people’s health and environmental ecosystems. Railway-induced vibrations in urban settings can cause disturbances and damages to surrounding buildings, infrastructures and residents. Over many decades, a number of mitigation methods have been proposed to attenuate vibrations at the source, in the transmission path, or at the receiver. In fact, low-frequency or ground-borne vibration is turned out to be more difficult to be mitigated at source, whilst some attenuation measures in propagation path can be applicable. To broaden the mitigating range at the low-frequency band, the applications of meta-materials/structures have been established. In railway systems, periodic structures or resonators can be installed near the protected buildings to isolate the vibrations. Despite a large number of proposed attenuation methods, the sustainability of those methods has not been determined. Based on rational engineering assumptions, the discounted cash flows in construction and maintenance processes are analysed in this study to evaluate lifecycle costs and the quantity of materials and fuels, as well as the amount of carbon emissions. This study is the world’s first to identify the efficacy and sustainability of some transmission path attenuation methods in both normal and adverse weather conditions. It reveals that geofoam trenches and wave impeding blocks are the most suitable methods. Although metamaterial applications can significantly mitigate a wider range of lower frequency vibrations, the total cost and carbon emissions are relatively high. It is necessary to significantly modify design parameters in order to enable low-cost and low-carbon meta-materials/structures in reality.

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Section: Wave Impeding Blocksmentioning

confidence: 99%

Sustainability of Vibration Mitigation Methods Using Meta-Materials/Structures along Railway Corridors Exposed to Adverse Weather Conditions

Kaewunruen

Qin

2020

Sustainability

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“…Most of the materials of WIB in the above studies are relatively single, and the materials are mainly concentrated in single-phase solid media, and there is less research on the composite mode of WIB and non-uniform materials. Ma (2018), Ma et al (2017) established a ground vibration isolation system with a functional gradient WIB in an elastic ground, and the study showed that the gradient WIB can effectively reduce the vibration amplitude. Gao et al (2020Gao et al ( , 2021 proposed a joint vibration isolation method combining Duxseal industrial filler and WIB (referred to as DXWIB), and found that the DXWIB barrier enhanced the bandwidth of traditional homogeneous WIB vibration reduction through experimental studies.…”

Section: Introductionmentioning

confidence: 99%

Study on vibration isolation performance of composite multilayer wave impeding block based on wave impedance ratio under an underground dynamic load

Zhang

2023

Lat. Am. j. solids struct.

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Based on the theory of single-phase elastic medium and unsaturated porous medium, the vibration isolation effect of composite multilayer wave impeding block (WIB) in the unsaturated ground under an underground dynamic load is investigated. The results show that the best vibration isolation effect can be obtained by designing the wave impedance ratio between the composite multilayer WIB and unsaturated ground. The composite multilayer WIB improves the vibration-damping bandwidth compared with the homogeneous WIB. The vibration isolation effect is better the closer the embedded depth of the composite multilayer WIB is to the vibration source, and its vibration isolation effect increases significantly with the increase of thickness, but when the thickness of the WIB exceeds a certain critical thickness, its vibration isolation effect decreases with the increase of thickness. Soil saturation has a significant effect on the vibration isolation effect of composite multilayer WIB in the unsaturated ground, and the composite multilayer WIB can achieve a better vibration isolation effect at low saturation.

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“…Therefore, to improve the vibration isolation performance of the conventional WIB for the above problems, some scholars carried out improvement on it. Ma et al 21,22 analyzed the vibration isolation effect of graded non-homogeneous WIB in elastic and saturated foundations under moving loads. Tian et al 23 based on the 2D semi-analytical BEM, the vibration isolation effect of Duxseal material in a 2D homogeneous elastic foundation with active vibration isolation are investigated.…”

Section: Introductionmentioning

confidence: 99%

Isolation effect of composite multilayer wave impeding block on P-wave in unsaturated foundation

Jiang

Bao

2023

Journal of Low Frequency Noise, Vibration and Active Control

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The traditional wave impeding block (WIB) is designed as composite multilayer WIB with the same thickness to improve its vibration isolation effect. Based on the wave theory in unsaturated porous medium and elastic medium, the isolation effect of composite multilayer WIB on P-wave in unsaturated soil is investigated, and the solution of the vertical displacement at surface after setting composite multilayer WIB (as an example for triple-layer) in unsaturated foundation is obtained. The key factors such as incidence angle, frequency, saturation, thickness, and burial depth of the composite multilayer WIB are evaluated on its vibration isolation properties. The results show that the optimum vibration isolation effect can be achieved by controlling the wave impedance ratio among layers of materials. The isolation efficiency of composite multilayer WIB is 33.9% higher than homogeneous WIB with same thickness at l east, and has good vibration isolation effect for low, medium, and high frequency.

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Analysis of Isolation Ground Vibration by Graded Wave Impeding Block under a Moving Load

Cited by 6 publications

References 14 publications

Sustainability of Vibration Mitigation Methods Using Meta-Materials/Structures along Railway Corridors Exposed to Adverse Weather Conditions

Sustainability of Vibration Mitigation Methods Using Meta-Materials/Structures along Railway Corridors Exposed to Adverse Weather Conditions

Study on vibration isolation performance of composite multilayer wave impeding block based on wave impedance ratio under an underground dynamic load

Isolation effect of composite multilayer wave impeding block on P-wave in unsaturated foundation

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