On the use of the Norwegian Geotechnical Institute's prototype seabed-coupled shear wave vibrator for shallow soil characterization - I. Acquisition and processing of multimodal surface waves

Vanneste, Maarten; Madshus, C.; Socco, Laura; Maraschini, Margherita; Sparrevik, P.; Westerdahl, H.; Duffaut, Kenneth; Skomedal, E.; Bjørnarå, Tore Ingvald

doi:10.1111/j.1365-246x.2011.04960.x

Cited by 40 publications

(37 citation statements)

References 41 publications

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“…20,21 However, Love-waves are very seldom used in an underwater environment, 7,22,23 since in conventional underwater and seismic experiments sources are deployed in the water column and only Scholte-waves can be generated. In order to generate Love-waves shear-wave sources located on the sea bottom must be used.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of seabed shear-wave velocity profiles using shear-wave source data

Dong

Nguyen

Duffaut

2013

The Journal of the Acoustical Society of America

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This paper estimates seabed shear-wave velocity profiles and their uncertainties using interface-wave dispersion curves extracted from data generated by a shear-wave source. The shear-wave source generated a seismic signature over a frequency range between 2 and 60 Hz and was polarized in both in-line and cross-line orientations. Low-frequency Scholte- and Love-waves were recorded. Dispersion curves of the Scholte- and Love-waves for the fundamental mode and higher-order modes are extracted by three time-frequency analysis methods. Both the vertically and horizontally polarized shear-wave velocity profiles in the sediment are estimated by the Scholte- and Love-wave dispersion curves, respectively. A Bayesian approach is utilized for the inversion. Differential evolution, a global search algorithm is applied to estimate the most-probable shear-velocity models. Marginal posterior probability profiles are computed by Metropolis-Hastings sampling. The estimated vertically and horizontally polarized shear-wave velocity profiles fit well with the core and in situ measurements.

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Section: Introductionmentioning

confidence: 99%

“…The hydrophone is mounted just above the interface and thus measures the acoustic pressure in the water column. 20 Both the SV-and SH-wave velocity profiles are estimated by Scholte-and Love-wave dispersion curves, respectively. A nonlinear Bayesian inversion approach is utilized to give quantitative nonlinear uncertainty estimation.…”

Section: Introductionmentioning

confidence: 99%

Estimation of seabed shear-wave velocity profiles using shear-wave source data

Dong

Nguyen

Duffaut

2013

The Journal of the Acoustical Society of America

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“…The work on nonlinear inversion can be found in Ivansson et al (1994), Ohta et al (2008) and Dong & Dosso (2011). More recently Vanneste et al (2011) and Socco et al (2011) used a shear source deployed on the seafloor to generate both vertical and horizontal shear waves in the seafloor. This enabled to measure both Scholte and Love waves and to inverse S-wave speed profile jointly, thereby obtaining information on anisotropy in the subsurface.…”

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confidence: 99%

Interface Waves

Dong¹,

Jens²

2011

Waves in Fluids and Solids

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“…Seafloor sources exist, including a design for the S-wave source used by Ewing et al (1992) and Collins et al (1996), and a vibrating source recently developed by Norwegian colleagues ( Fig. 3; Vanneste, 2011).…”

Section: Model Development and Validationmentioning

confidence: 99%

The development of ocean test beds for ocean technology adaptation and integration into the emerging U.S. offshore wind energy industry

Kirincich¹,

Borkland²,

Hines³

et al. 2018

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The landscape of applied ocean technology is rapidly changing with forces of innovation emerging from basic ocean science research methodologies as well as onshore high tech sectors. There is a critical need for ocean-related industries to continue to modernize via the adoption of state-of-the-art practices to advance rapidly changing industry objectives, maintain competitiveness, and be careful stewards of the ocean as a common resource. These objectives are of national importance for the dynamic ocean energy sector, and a mechanism by which new and promising technologies can be validated and adopted in an open and benchmarked process is needed. POWER-US seeks to develop Ocean Test Beds as research and development infrastructure capable of driving innovative observations, modeling, and monitoring of the physical, biological, and use characteristics present in offshore wind energy installation areas.The Industry Need: Throughout the second half of the last century, ocean technology advancements ushered in new ocean-related industries and ocean advancements that changed the course of history. Remote and deep water oil and gas exploration and extraction methods, bottom survey methods, global shipping route optimization, ocean storm and weather forecasting, etc. have enabled substantial economic gains. That much of ocean science and engineering today continues to rely on technologies developed in the last century is a testament to the robust nature of our previous development efforts. However, more recent technological innovations in environmental sensing, computing, and automation offer the potential to further revolutionize both existing ocean-related industries such as: energy, mining, transportation and shipping, global trade, adaptation and resiliency, defense and security, salvage, and ocean exploration as well as newly emerging ocean uses.One clear example of the need for rapid adoption of new technology is in the area of offshore wind energy production. As a new energy industry in the U.S., offshore wind shows tremendous potential as a component of the nation's energy future portfolio. However, solid scientific data on the design characteristics as well as consensus on the interactions of a wind farm with the marine environment are critical to reduce risk, advance public acceptance, and evolve the regulatory process. Coupling this with the unique conditions present over the U.S. outer continental shelf in areas slated for development, an acute need exists for creating the physical and organizational infrastructure to rapidly move innovations in site characterization through systematic validation and into industry best practices and/or regulatory requirements. This process requires an open and evolving infrastructure that allows benchmarked data sets to test and evaluate sensors, improved systems modeling, and analysis by neutral, disinterested parties. POWER-US White Paper May 2018Ocean Test Beds 2In the current era, a program of research through which ocean technology can be applied, vetted, and validated ...

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On the use of the Norwegian Geotechnical Institute's prototype seabed-coupled shear wave vibrator for shallow soil characterization - I. Acquisition and processing of multimodal surface waves

Cited by 40 publications

References 41 publications

Estimation of seabed shear-wave velocity profiles using shear-wave source data

Estimation of seabed shear-wave velocity profiles using shear-wave source data

Interface Waves

The development of ocean test beds for ocean technology adaptation and integration into the emerging U.S. offshore wind energy industry

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