Abstract
The paper discusses the possibility of using a powerful electromagnetic underwater sound projector to excite seismic waves. For the projector to be matched to soil, it is proposed that it should be enclosed in a resonant cavity in the form of a water-filled pipe. The parameters of the seismic waves thus excited are found by solving a self-consistent problem: one first finds the parameters of the seismic waves excited by the source positioned at the end of the pipe; then the results are used to determine the impedance seen looking into the pipe's lower end; and finally this impedance serves to find the field in the pipe and the source amplitude. This procedure yields resonance frequencies and matching conditions. Calculations show that the proposed excitation scheme makes it possible to build an efficient seismic wave generator that, when used in conjunction with the underwater sound projector developed at the Institute of Applied Physics at Nizhnii Novgorod, can deliver as much as 800 W of output power into longitudinal and transverse waves.
Original language | English |
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Pages (from-to) | 716-722 |
Number of pages | 7 |
Journal | Acoustical Physics |
Volume | 42 |
Issue number | 6 |
State | Published - Nov 1996 |