Sound radiation from an infinite elastic cylinder with dual-wave propagation-intensity distributions

摘要: The radiation of sound from an elastic cylindrical shell filled with fluid and supporting multi-wave propagation is studied analytically. Combinations supersonic subsonic waves are considered. radiated field mapped by using acoustic intensity vectors evaluated at various locations. Both time averaged instantaneous investigated. seen to vary markedly axial distance down the cylinder. effect shown be associated cross terms in relations, its magnitude location depend upon relative phase amplitudes individual waves. Subsonic demonstrated interact strongly cause a large modification distributions near surface.