Abstract:

A discussion is given regarding the acoustico elastic vibration of curved pipes with three different subtended angles and fixed at two ends. The influence parameters of eigenvalues of the coupled system such as stiffness ratio α ,sectional characteristic ratio γ and density ratio β are studied. The result shows that the product ζ of α and γ is an important parameter influencing the coupling vibration of curved pipes. With increase of ζ the structural vibration and acoustic fluctuation are turned from uncoupling to coupling. The coupling will result in a rapid decrease of eigenvalues of the system and in divergence in the end.

Key words: curved pipes, vibration, coupling