Transient Response of Multidimensional Arrays
NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT
Pagination or Media Count:
The transient pressure field generated by baffled pistons has received considerable attention because of its fundamental importance in the analysis of many acoustical problems. Although considerable work has been devoted to the analysis of the steady state response of line arrays, little effort has been devoted to develop a systematic approach to investigate their transient behavior. A simple approach to evaluate the transient and steady response of transmitting and receiving arrays is developed in this thesis. This method is an extension of Stepanishens spatial impulse response technique to free field line arrays of finite elements with time delay beamformers. An impulse response function is defined at a field point resulting from a distribution of sources and arbitrary time delays. The transient pressure field arising from the element distribution and time delay is then obtained by convolving the time derivative of the impulse response with the excitation waveform.
- Radiofrequency Wave Propagation