Abstract
The free and forced motions of ordered and disordered layered systems are analyzed. The structure of propagation and attenuation zones (PZs and AZs) of the infinite system depends on two nondimensional parameters ν and τ. Parameter ν is the ratio of the wave propagation durations at phase velocity through the two layers, whereas parameter τ is the ratio of mechanical impedances of the materials forming the two layers. Systems with finite values of ν and large or small values of τ, are weakly coupled and possess narrow PZs and wide AZs. For small or large values of τ, the finite periodic system includes dense `clusters' of natural frequencies; when forced by a trapezoidal pulse, the maximum compressional force of the first arrival of the stress wave is localized close to the point of application of the excitation. For values of τ of order unity this localization is eliminated. The effect on the free and forced response of disorder is then investigated.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 663-672 |
| Number of pages | 10 |
| Journal | Collection of Technical Papers - AIAA/ASME Structures, Structural Dynamics and Materials Conference |
| Issue number | pt 2 |
| State | Published - 1993 |
| Event | 34th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - La Jolla, CA, USA Duration: Apr 19 1993 → Apr 22 1993 |
ASJC Scopus subject areas
- Architecture
- Materials Science(all)
- Aerospace Engineering
- Mechanics of Materials
- Mechanical Engineering