Response of a thin‐wailed pipe section due to external excitation using energy accountancy I: Analytical study

Abstract

The energy accountancy method has been shown by Richards et al. to be a very practical and useful tool to estimate the noise energy radiated by a machine structure in broad frequency bands. The radiated noise energy was estimated to within ±3 dB for structures with a high modal density. For structures with low modal density, the method was used to estimate the total radiated noise energy and the mean level of radiated noise. This method of use of the energy accountancy concept is very much similar to statistical energy analysis. However, unlike statistical energy methods which are mainly restricted either to high modal density structures, where one can use statistical averaging to model the behavior of the structure or to estimate the total level of radiated noise for low modal density structures, the energy accountancy method can be used to estimate the noise energy radiated by a structure in narrow frequency bands. In this paper, using an energy accountancy approach, an expression is developed for each ...