Ender Ciğeroğlu

Department of Mechanical Engineering
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Nonlinear resonances of axially functionally graded beams rotating with varying speed including Coriolis effects
Lotfan, Saeed; Anamagh, Mirmeysam Rafiei; Bediz, Bekir; Ciğeroğlu, Ender (2021-11-01)
The purpose of the current study was to develop an accurate model to investigate the nonlinear resonances in an axially functionally graded beam rotating with time-dependent speed. To this end, two important features inclu...
Nonlinear Vibrations of Rotor-Bearing Systems Supported by Squeeze Film Dampers Due to Unbalance Excitation
Sevencan, Furkan; Ciğeroğlu, Ender; Baran, Özgür Uğraş (2021-11-01)
In this paper, nonlinear dynamic behaviors of a multi-mass flexible rotor-bearing system supported by short length Squeeze Film Damper (SFD) due to the unbalance excitation are presented. The rotordynamic model of the syst...
Development of linearized euler solvers on frequency domain for oscillating airfoils
Ardıç, Ata Tankut; Saygın, Aras; Baran, Özgür Uğraş; Ciğeroğlu, Ender (2021-09-08)
Ideal tooth profile modifications for improving nonlinear dynamic response of planetary gear trains
Ozturk, Veysel Yalin; Ciğeroğlu, Ender; Özgüven, Hasan Nevzat (2021-05-01)
The ultimate goal in this study is to investigate the effects of tooth profile modifications (TPMs) on PGTs by performing parametric studies. For this purpose, firstly a nonlinear planetary gear dynamics model with time-va...
On the solution of nonlinear algebraic equations following periodic forced response analysis of nonlinear structures using different nonlinear solvers
Kizilay, H. Sefa; Ciğeroğlu, Ender (2021-01-01)
In periodic forced response analysis of nonlinear structures, most of the time analytical solutions cannot be obtained due to the complex behavior of the nonlinearity and/or due to the number of nonlinear equations to be s...
Vibration reduction of a structure by using nonlinear tuned vibration absorbers
Dogan, Muhammed Emin; Ciğeroğlu, Ender (2021-01-01)
Tuned Vibration Absorbers (TVA) are commonly used in reducing undesirable vibrations of mechanical structures. However, TVAs work in a very limited frequency range and if the excitation frequency is outside of this range, ...
Integration of Parameter Sensitivity to Structural Optimization of Helicopter Rotors for Minimum Vibration
Bilen, Muhammed Emre; Ciğeroğlu, Ender; Özgüven, Hasan Nevzat (CRC, New York , 2020-10-01)
Helicopters are notorious for their high vibration levels and the rotor systems are the main contributors to the problem. Rotor vibrations can be minimized by optimizing the rotor structure. However, the result of the opti...
An improved quasi-zero stiffness vibration isolation system utilizing dry friction damping
Donmez, Ata; Ciğeroğlu, Ender; Özgen, Gökhan Osman (Springer Science and Business Media LLC, 2020-07-01)
Quasi-zero stiffness (QZS) isolators, a nonlinear vibration isolation technique, enhance the isolation performance, by lowering the natural frequencies of an isolation system while providing higher static load bearing capa...
Nonlinear dynamic analysis of a drivetrain composed of spur, helical and spiral bevel gears
Yavuz, Siar Deniz; Saribay, Zihni Burcay; Ciğeroğlu, Ender (Springer Science and Business Media LLC, 2020-06-01)
This paper proposes a dynamic model for the first time in order to investigate nonlinear time-varying dynamic behavior of a drivetrain including parallel axis gears (such as spur and helical gears) and intersecting axis ge...
Enhancement of the reliability of MEMS shock sensors by adopting a dual-mass model
Fathalilou, Mohammad; Soltani, Kamran; Rezazadeh, Ghader; Ciğeroğlu, Ender (Elsevier BV, 2020-03-01)
MEMS shock sensors are widely used with applications ranging from aircraft to electrical measurement systems. They are designed to operate at the shocks above a predefined threshold level. The conventional single-mass swit...
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