Resonance vibrations of buried landmines

Abstract

Resonance behavior of many types of landmines was first experimentally discovered in 2000 (Donskoy et al. in ). Laboratory studies and field tests have shown that mine's resonance response is a complex phenomenon dependent upon interaction between soil and mines and their respective properties. Although the resonance effect was successfully used by various research teams for detection of landmines, there were no thorough studies on various factors influencing buried mine's resonance response. This paper presents results of theoretical and experimental investigation of this problem including multi-modal structure of mine's vibration response, effect of burial depth and soil condition. In the modeling efforts we considered multiple modes of vibration of mine casing and represented them as oscillators with effective parameters. This approach allowed for simplification of analysis and expanding existing lump-element model to account for multiple vibration modes. The experimental tests were focused on studying the effects of burial depth and soil moisture content on resonance behavior of soil-mine system. The tests have shown that a resonance frequency initially decreases with burial depth, as expected. However, an anomalous resonance frequency increase was observed at greater depths; soil moisture even further increases the resonance frequency.

Structural vibrations of buried land mines

“…[1][2][3][4][5][6]8 However, recent investigations 10,11,22,23 revealed that at certain depths buried mines exhibit an unexpected upward frequency shift, suggesting more complex dynamics of the soil-mine system. Figure 7 indicates that the first resonance frequency decreases and then, at a certain burial depth, starts to increase exhibiting an upward frequency shift at greater depths.…”

Granular layers on vibrating plates: Effective bending stiffness and particle-size effects

“…Both linear [1][2][3][4] and nonlinear [5][6][7][8] detection methods have shown good success in laboratory and field tests. These methods rely on the vibration response of the top plate of the mine under excitation from an acoustic wave.…”

SLDV III: the next generation of acousto-optical landmine detection

“…A detailed description of all the possible phenomena and typical acoustic signatures, measured on both anti-tank and anti-personnel landmines, can be found in [6] and [9]. A. Zagrai, D. Donskoy and A. Ekimov have analyzed the multi-modal resonance behavior of landmines experimentally and theoretically [10]. Their studies considered various factors influencing the resonance response, e.g.…”