PASSIVE DAMPING AUGMENTATION OF A VIBRATING BEAM USING PSEUDOELASTIC SHAPE MEMORY ALLOY WIRES
✍ Scribed by F. GANDHI; G. CHAPUIS
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 449 KB
- Volume
- 250
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
This paper examines the e!ectiveness of pseudoelastic shape memory alloy (SMA) wires for passive damping of #exural vibrations of a clamped}free beam with a tip mass. A "nite-element model of the system is developed and validated with experimental results. The SMA behavior is modelled using amplitude-dependent complex modulus. Numerical simulations indicate that the damping introduced by the SMA wires will increase for higher excitation-force amplitudes that produce higher strain levels in the SMA wires. Increasing the wire cross-section area provides more damping at low force-excitation amplitudes, but reduced damping at higher amplitudes. The angle between the beam and the SMA wires is an in#uential parameter, and a value in the 10}203 range was found to introduce maximum damping. The underlying physical mechanisms are examined in detail. System damping depends only mildly on the SMA wire length, and is una!ected by the tip mass.
2002 Academic Press