CHARACTERISTICS OF WAVE PROPAGATION AND ENERGY DISTRIBUTIONS IN CYLINDRICAL ELASTIC SHELLS FILLED WITH FLUID 充液圆柱弹性壳中波的传播特性及能量分布.pdfVIP

Journal ofSound and Vibration (1982) 81(4), 501-518 CHARACTERISTICS OF WAVE PROPAGATION AND ENERGY DISTRIBUTIONS IN CYLINDRICAL ELASTIC SHELLS FILLED WITH FLUID C. R. FULLER AND F. J. FAHY Institute of Sound and Vibration Research, University of Southampton, Southampton SO9 5NH, England (Received 16 March 1981, and in revised form 10 August 1981) The dispersion behaviour and energy distributions of free waves in thin walled cylin- drical elastic shells filled with fluid are investigated. Dispersion curves are presented for a range of parameters and the behaviour of individual branches is explained. A non- dimensional equation which determines the distribution of vibrational energy between the shell wall and the contained fluid is derived and its variation with frequency and material parameters is studied. 1. INTRODUCTION The problems of elastic wave propagation in thin walled shells in uucuo and in fluid contained in rigid cylindrical ducts have separately received a great deal of attention. When the two fields are coupled together, by allowing the duct wall to be elastic, the resulting wave behaviour is far more complex and consequently there is less literature available on this topic. In particular, little physical explanation of the behaviour of waves in terms of propagation and energy distribution through the shell sy