Abstract
The problem of bending vibration, dynamic response, and actively dynamic control of rotating beams of nonuniform cross section, operating in a temperature field and impacted by a blast, is addressed. The structural model is in the form of a thin-walled beam whose material properties are considered to be temperature dependent. The implemented vibration control methodology is based on the piezoelectric strain actuation. In this context, a system of piezo actuators bonded to the structure surface that are spread over the entire span of the beam and actuated out of phase is considered. As a result, a control bending moment is piezoelectrically induced at the beam tip. In the context of this paper, to control the free and forced vibration, velocity feedback control is implemented. The considered control methodology is also useful toward counteracting the deleterious effects induced by the thermal degradation of material properties of blade structure. Results highlighting the effects of the blade taper on bending natural frequencies, as well as of the temperature and time-dependent external excitation on the open/closed-loop bending dynamic response are presented, and pertinent conclusions are drawn.
| Original language | English |
|---|---|
| Pages (from-to) | 625-644 |
| Number of pages | 20 |
| Journal | Journal of Thermal Stresses |
| Volume | 27 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2004 Jul 1 |
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Keywords
- Dynamic response control
- Piezoelectric strain actuation
- Rotating blades
- Thermal degradation
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Physical and Theoretical Chemistry
- Computational Mechanics
- Mechanics of Materials
Cite this
Dynamics and active bending vibration control of turbomachinery rotating blades featuring temperature-dependent material properties. / Na, Sung Soo; Librescu, Liviu; Jung, Hoedo.
In: Journal of Thermal Stresses, Vol. 27, No. 7, 01.07.2004, p. 625-644.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dynamics and active bending vibration control of turbomachinery rotating blades featuring temperature-dependent material properties
AU - Na, Sung Soo
AU - Librescu, Liviu
AU - Jung, Hoedo
PY - 2004/7/1
Y1 - 2004/7/1
N2 - The problem of bending vibration, dynamic response, and actively dynamic control of rotating beams of nonuniform cross section, operating in a temperature field and impacted by a blast, is addressed. The structural model is in the form of a thin-walled beam whose material properties are considered to be temperature dependent. The implemented vibration control methodology is based on the piezoelectric strain actuation. In this context, a system of piezo actuators bonded to the structure surface that are spread over the entire span of the beam and actuated out of phase is considered. As a result, a control bending moment is piezoelectrically induced at the beam tip. In the context of this paper, to control the free and forced vibration, velocity feedback control is implemented. The considered control methodology is also useful toward counteracting the deleterious effects induced by the thermal degradation of material properties of blade structure. Results highlighting the effects of the blade taper on bending natural frequencies, as well as of the temperature and time-dependent external excitation on the open/closed-loop bending dynamic response are presented, and pertinent conclusions are drawn.
AB - The problem of bending vibration, dynamic response, and actively dynamic control of rotating beams of nonuniform cross section, operating in a temperature field and impacted by a blast, is addressed. The structural model is in the form of a thin-walled beam whose material properties are considered to be temperature dependent. The implemented vibration control methodology is based on the piezoelectric strain actuation. In this context, a system of piezo actuators bonded to the structure surface that are spread over the entire span of the beam and actuated out of phase is considered. As a result, a control bending moment is piezoelectrically induced at the beam tip. In the context of this paper, to control the free and forced vibration, velocity feedback control is implemented. The considered control methodology is also useful toward counteracting the deleterious effects induced by the thermal degradation of material properties of blade structure. Results highlighting the effects of the blade taper on bending natural frequencies, as well as of the temperature and time-dependent external excitation on the open/closed-loop bending dynamic response are presented, and pertinent conclusions are drawn.
KW - Dynamic response control
KW - Piezoelectric strain actuation
KW - Rotating blades
KW - Thermal degradation
UR - http://www.scopus.com/inward/record.url?scp=3142774941&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3142774941&partnerID=8YFLogxK
U2 - 10.1080/01495730490466219
DO - 10.1080/01495730490466219
M3 - Article
AN - SCOPUS:3142774941
VL - 27
SP - 625
EP - 644
JO - Journal of Thermal Stresses
JF - Journal of Thermal Stresses
SN - 0149-5739
IS - 7
ER -