1 research outputs found
The response of structures to acoustic excitation with special reference to the sonic boom
The research reported in this thesis is concerned with the
response of mechanical structures to the excitation of acoustic fields.
Both the vibration of the structure itself (sonic boom studies) and the
secondary sound field which this vibration produces (transmission loss
studies) are investigated.
In measuring the airborne transmission loss of a high loss
partition an important limitation of the University's experimental
suite was discovered. Attempts at an indirect measurement of transmission
loss using vibration transducers illustrate a fallacious assumption
of most transmission loss theories. These findings impose a considerable
limitation upon the accelerometer method of transmission loss
measurement.
The study of structural vibration was extended to sonic boom
response. In particular the effects of a cavity behind a panel upon
the panel's dynamic properties is studied both experimentally and theoretically.
This model is comparable with a window-room system and so is of
current interest in the evaluation of the possibility of sonic boom
damage