Nonlinear Wave Propagation with Implications for Mine Neutralization
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Pagination or Media Count:
Prototype devices that use pulse power techniques to generate an intense acoustical field in water have fostered a renewed interest in applying finite amplitude sound to the mine neutralization problem, particularly in a littoral region. A simple intuitive description of acoustical mine neutralization includes three basic processes 1 generation of the acoustical field at the source 2 nonlinear wave propagation and 3 neutralization mechanisms at the target. This document focuses on the second issue, the propagation of an intense acoustical field from a source to a target. The research discussed here provides a theoretical foundation for a modeling effort, describes several case studies, and gives empirical rules for establishing the material parameters of fresh and sea water required by the theory. Several key issues are presented, including the breakdown of using linear superposition of the results for discrete sources in an array, phasing an array of discrete sources for beam steering, and peak positive and negative pressures.
- Naval Surface Warfare