Nonlinear 3D finite element analysis of a shear-wave vibrator-ground interaction system

Peng, Xun; Huang, Zhiqiang; López‐Querol, Susana; Lei, Hao

doi:10.1016/j.soildyn.2020.106520

Cited by 4 publications

(2 citation statements)

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“…Fig. 1(c) is the vibrator structure diagram of BV-300 vibroseis analyzed in this study, in which the length, width and height are 2.37×1.58×1.12m (Peng et al 2021) respectively. In the working process, the contact between the vibrator base plate and the ground is only generated by the vehicle weight (compaction load) in the static loading stage.…”

Section: Description Of Shear Wave Vibroseismentioning

confidence: 99%

“…Alkan et al(2013) compared the direct shear wave modes generated by the compressional wave vibrator and the shear wave vibrator, and found that the two excitation sources are very similar, which made it possible for the longitudinal wave vibrator to excite the shear wave instead of the shear wave vibrator. Peng et al(2021)studied the system response characteristics of nonlinear interaction ( Peng et al2020), rough contact interface (Huang et al2019)and dynamic stiffness (Huang et al2018) in the shear wave vibrator-earth system by finite element method, and considered the influence of parameters such as vibrator excitation frequency and the depth of plate embedded in the earth on the vibrator excitation effect, so as to improve the excitation signal quality. Vanneste et al(2011)designed a new type of seabed coupled shear wave vibrator, which made pure shear wave data be used in marine field investigation and exploration to improve the imaging characteristics of marine stratum soil.…”

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Study on excitation effect of different combination modes of shear wave vibroseis

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Huang,

Hao

et al. 2024

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In order to solve the problems of less earth capture energy and shallow depth of shear wave signal transmission during the operation of shear wave vibroseis, and improve the exploration quality, the influence of different combination methods on excitation effect is studied. Through numerical simulation, the vibrator-geodetic finite element model of combined shear wave vibroseis is established. Taking the earth capture energy, particle displacement amplitude and shear stress as evaluation indexes, the influence of three parameters, namely arrangement mode, spacing and number, on the combined excitation effect of shear wave vibroseis is deeply studied. The results show that, in terms of arrangement, compared with two SHY arrangements, two SHX vibroseis capture more energy in the earth when excited, and the particle displacement amplitude increases by 91.5% on average compared with a single vibroseis, and the sine wave shape of the shear stress curve is more complete, and the attenuation degree is smaller with the increase of depth; In terms of vibroseis spacing, compared with the combined vibroseis with the spacing of 3m, 9m and 12m, the combined vibroseis with the spacing of 6m has more ground capture energy, the particle displacement amplitude is increased by 81.2% on average compared with the single vibroseis, the shear stress distortion is smaller, and the attenuation is slower with the increase of depth. In terms of vibroseis number, compared with 4, 6 and 8 combined vibroseis, the loss rate of earth capture energy is the lowest when the 2 combined vibroseis excite, which is only 6.06% compared with the single vibroseis, and the particle displacement amplitude is increased by 78.2% on average compared with the single vibroseis, and the shear stress amplitude is larger. The research results can provide guidance for improving the excitation effect of shear wave vibroseis, and also provide reference for the study of combined excitation design of shear wave vibroseis.

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Section: Description Of Shear Wave Vibroseismentioning

confidence: 99%

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confidence: 99%