A boundary element approach to ocean seismoacoustic facet reverberation

An Efficient Approach for Seismoacoustic Scattering Simulation Based on Boundary Element Method

Finite Element Based Eigenanalysis for the Study of Electrically Large Lossy Cavities and Reverberation Chambers

An eigenanalysis-based technique is presented for the study and design of large complicated closed cavities and particularly Reverberation Chambers, including conductor and dielectric material losses. Two different numerical approaches are exploited. First, a straightforward approach is adopted where the finite walls conductivity is incorporated into the Finite Element Method (FEM) formulation ...

Passive Estimation of the Ocean Seismoacoustic Environment by Extracting the Green’s Function from Ambient Noise

In the ocean, the dominant seismoacoustic noise source mechanism varies greatly across frequencies from ocean wave generated microseisms (0.05Hz-0.2Hz) to sea-surface noise (above 1kHz), including noise generated by human or biological activities. Though incoherent imaging with ocean ambient noise has been demonstrated (e.g. daylight imaging), a goal of this research is to use ambient noise, an...

A General Boundary Element Formulation for The Analysis of Viscoelastic Problems

The analysis of viscoelastic materials is one of the most important subjects in engineering structures. Several works have been so far made for the integral equation methods to viscoelastic problems. From the basic assumptions of viscoelastic constitutive equations and weighted residual techniques, a simple but effective Boundary Element (BE) formulation is developed for the Kelvin viscoelastic...

Seismoacoustic evidence for volcanic activity on the ultraslow- spreading Gakkel Ridge, Arctic Ocean

[1] In 1999, a swarm of earthquakes and a lava flow signaled a volcanic eruption at the eastern end of Gakkel Ridge, the slowest spreading ridge worldwide. In summer 2001, the multidisciplinary Arctic Mid-Ocean Ridge Expedition studied these ridge processes which are unusual at ultraslow spreading rates. As part of these studies, we examined the microearthquake activity of the ridge with seismo...