Analytical frequency-response functions for a structural system
The problem of determining the random response of a structural system requires a knowledge of the appropriate frequency response functions over the frequency range of interest. If the excitation is broadband and the structure is lightly damped, conventional finite element methods of obtaining the frequency response functions are both time consuming and costly. A technique is presented here where frequency response functions for reasonably complex structures can be found in an expensive and timely manner. Once these functions are obtained, the response to an arbitrary stationary random or transient excitation with the specified spatial distribution may be found. The structural system that is studied is a thin, linear-viscoelastic, circular cylindrical shell with an internal structural subsystem. Frequency responses are obtained for two separate loadings. One of these is an axisymmetric pressure loading derived from an acoustic environment; the other a forced base motion obtained from a mechanical vibration environment. The method of receptance is used to determine the total system frequency response from a knowledge of the component frequency response functions.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5316613
- Report Number(s):
- SAND-82-0256C; CONF-820614-1; ON: DE82011028
- Country of Publication:
- United States
- Language:
- English
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