... wind energy that is being transferred to a galloping beam. The beam has a rigid tip body with a D-shaped cross section. Piezoelectric sheets are bonded on the top and bottom surface of the beam. During galloping, vibrational motion is input to the system due to aerodynamic forces on the D-section...

...Stefano Bianchi; Alessandro Corsini; Franco Rispoli; Anthony G. Sheard This study investigates the causal relationship between flow aerodynamics and radiated noise in low-speed axial fans. Using blades with three distinctive tip configurations, including two that were developed with a view...

... field with a corresponding sectional lift coefficient, which displays a much broader range of response frequencies between the first and third harmonic components of the plunging reduced frequency. 03 06 2010 30 06 2010 17 03 2011 17 03 2011 aerodynamics aircraft...

... in a limit cycle at higher wind speeds. A linearized analytical model of the device is derived to include the effects of the three-way coupling between the structural, unsteady aerodynamic, and electrical aspects of the system. A stability analysis of this model is presented to determine the frequency...

... to its primary function of bearing aerodynamic loads, the wing/spar structure of an UAV or a MAV with embedded piezoceramics can provide an extra electrical energy source based on the concept of vibration energy harvesting to power small and wireless electronic components. Aeroelastic vibrations...

...Hongbiao Yu; K. W. Wang For bladed-disk assemblies in turbomachinery, the elements are often exposed to aerodynamic loadings, the so-called engine order excitations. It has been reported that such excitations could cause significant structural vibration. The vibration level could become even more...

... flow rates of certain valves with respect to others. Table 3 presents the numerical values of the variables used in the simulation. 15 02 2005 06 02 2007 aerodynamics pulsatile flow compressors valves linear differential equations pistons high-pressure effects...

... acoustics damping elastic constants aerodynamics One of the main contributors to rotordynamic instability in modern day turbomachinery is cross-coupled stiffness. The terminology comes from the phenomenon in which the reactive stiffness force is normal to the rotor displacement. Cross-coupled...

... 2004 elasticity aerodynamics supersonic flow vibrations finite difference methods To carry out the design analysis of complex aeroelastic systems, one needs to decrease the number of degrees of freedom involved in the problem in order to expedite computational analysis. In design...

... response functions of multiple co-rotating disks are measured in air and in vacuum to study the effects of aerodynamic coupling. In vacuum, vibration modes from each rotating disk are aerodynamically uncoupled; therefore, corresponding travelling waves from each disk have the same natural frequency. When...

... means for optimizing sensor and actuator geometries. Reduced-order models of potential-flow aerodynamics were developed for facilitation of analysis and design of the aeroelastic system in the early design phase. Using these methods, models capturing “95% of the physics with 8% of the modeling effort...

... OF VIBRATION AND ACOUSTICS . Manuscript received Oct. 1999; revised Aug. 2000. Associate Editor: S. C. Sinha. 01 Oct 1999 01 Aug 2000 delamination laminates vibrations supersonic flow aerodynamics The K-L decomposition is a method of representing a stochastic system in terms...