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Keywords: frequency response
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032505.
Published Online: January 4, 2012
... this rotation force. Another method is the use of a unidirectional excitation and a mathematical operation to distinguish the forward whirl from the backward whirl. In this method, a directional frequency response function that separates the two modes in the frequency domain is obtained from four frequency...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2012, 134(1): 011601.
Published Online: November 4, 2011
... a desired reserve capacity for frequency response as specified. 28 04 2011 28 04 2011 04 11 2011 04 11 2011 combined cycle power stations frequency response gas turbine power stations gas turbines load (electric) power control power generation control power markets shafts...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2011, 133(3): 032502.
Published Online: November 11, 2010
... force must be kept constant at a known value on every blade during step-sine test to calculate frequency response functions. The issue of the force control is therefore addressed since the performance of the electromagnet changes with frequency. The system calibration procedure and the estimated errors...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082401.
Published Online: May 18, 2010
.... The first approach generates frequency response functions (FRFs) from the finite element case model at the bearing support locations. A high-order polynomial in numerator-denominator transfer function format is generated from a curve fit of the FRF. These transfer functions are then incorporated...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. June 2010, 132(6): 062502.
Published Online: March 17, 2010
... the capability of analyzing bladed disks with pronounced frequency veering effects. The method allows the use of industrial-size sector models of bladed disks for analysis of forced response of a mistuned structure. The frequency response function matrix of a structurally mistuned bladed disk is derived...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2010, 132(4): 041603.
Published Online: January 26, 2010
... measuring system. An ambient temperature centrifugal compressor rig acts as an experimental source of fluctuating pressure. The compressor is operated at different discrete rotational speeds, and the blade-passing frequencies are used to obtain frequency response data. In the experiments, pressure waves...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2006, 128(3): 670–676.
Published Online: September 28, 2005
... an otherwise accurate engineering model of the system in combination with available measurements of system frequency response functions. The approach permits treatment of flexible rotors and allows that the system test excitations and measurement sensors are not collocated. Because all engineering models...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2005, 127(2): 301–306.
Published Online: April 15, 2005
...J. Eckstein; E. Freitag; C. Hirsch; T. Sattelmayer; R. von der Bank; T. Schilling The low-frequency response of the spray from a generic airblast diffusion burner with a design typical of an engine system has been investigated as part of an experimental study to describe the combustion oscillations...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2006, 128(3): 677–684.
Published Online: March 1, 2004
... row-sum norm of the system frequency response matrix. The minimization of this norm is treated through the formulation of a set of linear matrix inequalities that can also incorporate design parameter constraints and stability criteria. The formulation can also be extended to cover uncertain or time...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 149–155.
Published Online: December 27, 2002
...J. A. Va´zquez; E. H. Maslen; H.-J. Ahn; D.-C. Han The experimental identification of a long flexible rotor with three magnetic bearing journals is presented. Frequency response functions are measured between the magnetic bearing journals and the sensor locations while the rotor is suspended...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 75–80.
Published Online: December 27, 2002
... is then used to design the control system of the active bearing based on root locus curves. The active system stability is analyzed by calculating its eigenvalues and frequency response curves. The theoretical and experimental results show that this kind of bearing can significantly reduce the vibration level...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 1011–1017.
Published Online: September 24, 2002
..., New Orleans, LA, June 4–7, 2001; Paper 01-GT-273. Manuscript received by IGTI, December 2000, final revision, March 2001. Associate Editor: R. Natole. 04 June 2001 01 December 2000 01 March 2001 24 09 2002 turbines dynamics vibrations frequency response eigenvalues...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2002, 124(3): 586–597.
Published Online: June 19, 2002
... the frequency response function (FRF) matrix of the tuned system and a matrix describing the mistuning. The main advantages of the method are its efficiency and accuracy, which allow the use of large finite element models of practical bladed disk assemblies in parametric studies of mistuning effects...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2002, 124(3): 517–527.
Published Online: June 19, 2002
... and instrumentation used to monitor and diagnose problems associated with rolling element bearing machinery. machine bearings flaw detection displacement measurement transducers vibrations frequency response 04 June 2001 01 Sept 2000 01 Mar 2001 19 06 2002 Contributed...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2002, 124(1): 220–225.
Published Online: March 1, 2001
...D. Moro; N. Cavina; F. Ponti, DIEM This paper presents an original methodology for the instantaneous in-cylinder pressure waveform reconstruction in a spark-ignited internal combustion engine. The methodology is based on the existence of a linear correlation, characterized by frequency response...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2001, 123(2): 404–411.
Published Online: June 9, 1999
... received by the ASME Headquarters June 9, 1999. Editor: H. D. Nelson. 04 May 1999 09 June 1999 rotors turbines vibrations vibrational modes modal analysis identification parameter estimation frequency response elasticity mass In regards to the maximum likelihood (ML...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2001, 123(2): 395–403.
Published Online: June 9, 1999
... vibrations vibrational modes modal analysis identification parameter estimation frequency response elasticity mass A large number of investigations have focused, in the last thirty years, on the assessment of the effects of mistuning, i.e., small blade-to-blade variations of their mechanical...