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Seismic source model for moving vehicles

Ketcham, S.A. ; Moran, M.L. ; Lacombe, J. ; Greenfield, R.J. ; Anderson, T.S.

IEEE transactions on geoscience and remote sensing, 2005-02, Vol.43 (2), p.248-256 [Periódico revisado por pares]

New York, NY: IEEE

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Título:
Seismic source model for moving vehicles
Autor: Ketcham, S.A. ; Moran, M.L. ; Lacombe, J. ; Greenfield, R.J. ; Anderson, T.S.
Assuntos: Applied geophysics ; Computer simulation ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Finite difference method ; Finite difference methods ; Finite-difference time-domain (FDTD) methods ; Frequency ; Grounds ; Internal geophysics ; Land vehicles ; Load modeling ; Mathematical models ; modeling ; Propagation ; Road vehicles ; Seismic engineering ; seismic inverse problems ; Seismic phenomena ; seismic signal processing ; Seismic waves ; Time domain analysis ; Tires ; Vehicle dynamics ; Vehicles ; Wave propagation ; Wheels
É parte de: IEEE transactions on geoscience and remote sensing, 2005-02, Vol.43 (2), p.248-256
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: We develop a method for the loading of ground by moving vehicles in large finite-difference time-domain simulations of seismic wave propagation. The objective is to realistically produce two distinct types of ground loading for either wheeled or tracked vehicles in our propagation models: lower frequency loading associated with suspension dynamics and higher frequency impulsive loading associated with tire treads or wheels rolling over individual track blocks. These loading characteristics are important because field measurements show that vehicle ground forcing in both frequency bands produces seismic surface waves that networked sensors can remotely process for security applications. The method utilizes a vehicle-dynamics model to calculate a response to vehicle acceleration and ground features such as bumps; calculates forces transmitted to the ground; distributes these forces to staggered points of a finite-difference model; and simulates seismic wave propagation away from the vehicle. We demonstrate the method using bounce-and-pitch models of wheeled and tracked vehicles. We show that by carefully preprocessing force inputs, we can accurately simulate wave propagation and seismic signatures in finite-difference analyses of vehicles moving continuously over terrain.
Editor: New York, NY: IEEE
Idioma: Inglês

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Seismic source model for moving vehicles

Ketcham, S.A. ; Moran, M.L. ; Lacombe, J. ; Greenfield, R.J. ; Anderson, T.S.

New York, NY: IEEE

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