Modal cross-spectral terms may be important and an alternative method of analysis be preferable
✍ Scribed by T. Dahlberg
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 338 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0022-460X
No coin nor oath required. For personal study only.
✦ Synopsis
The influence of modal cross-spectral densities on structural responses is discussed for linear structures excited by narrow band stationary random processes. For a simple beam structure it is shown that these densities play an important role if the narrow band excitation falls close to an anti-resonance of the structure. An alternative formulation of the solution method, in which also modal analysis is used, is given. It is shown that in some cases of interest the alternative formulation yields better accuracy and involves less computational work than the traditional solution method. Results obtained by modal analysis of the beam structure are compared With the known exact response.