Nonlinear Forced Response Analysis of Bladed Disks With Wedge Dampers

Kızılay, Hazım Sefa
Ciğeroğlu, Ender


Nonlinear vibration analysis of bladed disks with dry friction dampers
Ciğeroğlu, Ender; Özgüven, Hasan Nevzat (2006-08-22)
in this work, a new model is proposed for the vibration analysis of turbine blades with dry friction dampers. The aim of the study is to develop a multiblade model that is accurate and yet easy to be analyzed so that it can be used efficiently in the design of friction dampers. The suggested nonlinear model for a bladed disk assembly includes all the blades with blade to blade and/or blade to cover plate dry friction dampers. An important feature of the model is that both macro-slip and micro-slip models ar...
Nonlinear vibration analysis of rotors supported by ball bearings
Bahan, Doğancan; Ciğeroğlu, Ender; Department of Mechanical Engineering (2019)
Performance of ball bearing-rotor systems is highly dependent on and often limited by characteristics of ball bearings. Ball bearings are nonlinear by their nature and this nonlinearity must be investigated rigorously to correctly predict vibration response of the system. The steady-state periodic response of rotor systems with nonlinear ball bearings is investigated. The rotor is modeled with the Finite Element Method. Nonlinear model for the bearings considers finite number of balls, bearing clearance and...
Nonlinear Dynamic Analysis of an Asymmetric Ball Bearing Rotor System
Bahan, Doğancan; Ciğeroğlu, Ender (2019-11-14)
Performance of ball bearing–rotor systems are highly dependent on and often limited by characteristics of ball bearings. Several studies are available in the literature, investigating varying compliance and subharmonic resonances of ball bearings. Most of the studies are carried out with rigid rotors to focus on modelling of the bearings. There exist few studies which take flexibility of rotors into account. Furthermore, even if the rotor flexibility is modelled, most of the time symmetrical rotors are cons...
Nonlinear reduced order modeling of bolted joints
Karapıstık, Gökhan; Ciğeroğlu, Ender; Department of Mechanical Engineering (2019)
Most of the structural systems assembled by using bolted joints. Therefore, bolted joint models have a critical importance to estimate the behavior of the overall assembled system. There are several linear bolted joint models, which consist of spring and dashpot elements in literature. While they can estimate the resonant frequency of the overall system with a sufficient accuracy, linear bolted joint models are inadequate for approximating the damping, which arises from the friction in the contact interface...
Nonlinear Dynamic Analysis of a Spiral Bevel Geared System
Yavuz, Siar Deniz; Saribay, Zihni Burcay; Ciğeroğlu, Ender (2017-02-02)
A nonlinear dynamic model of a spiral bevel gear train mounted on flexible shafts and bearings is proposed in this study. The finite element model of shafts is combined with a three-dimensional discrete mesh model of a spiral bevel gear pair. Bearing flexibilities are as well included in the model. Gear backlash is incorporated into the model in the form of clearance-type displacement functions and clearance nonlinearity and stiffness fluctuations of the bearings are neglected. A time-invariant mesh stiffne...
Citation Formats
H. S. Kızılay and E. Ciğeroğlu, “Nonlinear Forced Response Analysis of Bladed Disks With Wedge Dampers,” 2019, Accessed: 00, 2021. [Online]. Available: