Whirling speeds and unbalance responses of rotating shafts using finite element method.

Özkan, Z. Levent


Whirl speeds and unbalance response of multibearing rotors using finite-elements
Özgüven, Hasan Nevzat; Özkan, Z. Levent (1984-01-01)
This paper presents dynamic modeling of rotor bearing systems with rigid disks, distributed parameter finite rotor elements and flexible, discrete multibearings. The previous works have included the effects of rotary inertia, gyroscopic moment, axial load, internal viscous and hysteretic damping and transverse shear deformations, but have not considered them all in the same model. A computer program is developed in this work to calculate the forward and backward whirl speeds, the corresponding mode shapes, ...
Nozzle blockage in continuous casting of al-killed SAE 1006 and SAE 1008 grades in Iskenderun Iron and Steel Works
Sakallı, Erhan; Sevinç, Naci; Department of Metallurgical and Materials Engineering (2004)
In this work, nozzle clogging in the submerged entry nozzle in continuous casting of Al killed steels has been studied. The study has been based on low silicon Al killed SAE 1006 (1.2006) and SAE 1008 (1.2008) grades. In this study, castabilities of 75 heats for 1.2006 steel grades and 75 heats for 1.2008 steel grades have been investigated. Castabilities of the experimental heats have been found to be affected by Al content in oxide form (Aloxy) and Ca content of the liquid steel. Castabilities have been f...
Infilled Frame Response Under Seismic Excitation
Demirel, İsmail Ozan; Yakut, Ahmet; Metin, Hasan (2017-06-08)
Receptances of non proportionally and continuously damped plates Reduced dampers method
Özgüven, Hasan Nevzat (Elsevier BV, 1982-12-01)
This paper presents a method for the dynamic analysis of continuously and non-proportionally damped plates in bending modes. The damping can be in the form of constrained or unconstrained layers. The method is an extension of the equivalent dampers method discussed in a previous paper, in which the damping matrix of a discretized plate is replaced by a diagonal equivalent damping matrix. Each diagonal element represents an equivalent damper inserted between the structure and ground. In this method the numbe...
Impedance boundary conditions for time-domain computational aeroacoustics methods
Özyörük, Yusuf (null; 1997-01-01)
A time-domain impedance condition method has been developed for computational aeroacoustics applications. The basis for this method is the standard impedance condition stated in the frequency domain as the particle displacement continuity equation. The development of the time-domain impedance condition follows the relations among the frequency, z-, and discrete-time domains and a rational function representation of the impedance in the z-domain. The resultant impedance condition is finite, infinite-impulse-...
Citation Formats
Z. L. Özkan, “Whirling speeds and unbalance responses of rotating shafts using finite element method.,” Middle East Technical University, 1983.