Nonlinear time-varying dynamic analysis of a spiral bevel geared system

SD Yavuz, ZB Saribay, E Cigeroglu - Nonlinear Dynamics, 2018 - Springer
In this paper, a nonlinear time-varying dynamic model of a drivetrain composed of a spiral
bevel gear pair, shafts and bearings is developed. Gear shafts are modeled by utilizing …

Ideal tooth profile modifications for improving nonlinear dynamic response of planetary gear trains

VY Öztürk, E Cigeroglu, HN Özgüven - Journal of Sound and Vibration, 2021 - Elsevier
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 …

A new modal superposition method for nonlinear vibration analysis of structures using hybrid mode shapes

E Ferhatoglu, E Cigeroglu, HN Özgüven - Mechanical Systems and Signal …, 2018 - Elsevier
In this paper, a new modal superposition method based on a hybrid mode shape concept is
developed for the determination of steady state vibration response of nonlinear structures …

Nonlinear resonances of axially functionally graded beams rotating with varying speed including Coriolis effects

S Lotfan, MR Anamagh, B Bediz, E Cigeroglu - Nonlinear Dynamics, 2022 - Springer
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 …

A novel modal superposition method with response dependent nonlinear modes for periodic vibration analysis of large MDOF nonlinear systems

E Ferhatoglu, E Cigeroglu, HN Özgüven - Mechanical Systems and Signal …, 2020 - Elsevier
Abstract Design of complex mechanical structures requires to predict nonlinearities that
affect the dynamic behavior considerably. However, finding the forced response of nonlinear …

Nonlinear free vibrations of curved double walled carbon nanotubes using differential quadrature method

E Cigeroglu, H Samandari - Physica E: Low-dimensional Systems and …, 2014 - Elsevier
Nonlinear free vibration analysis of curved double-walled carbon nanotubes (DWNTs)
embedded in an elastic medium is studied in this study. Nonlinearities considered are due to …

A weak-form spectral Chebyshev technique for nonlinear vibrations of rotating functionally graded beams

S Lotfan, D Dedekoy, B Bediz… - Mechanics of Advanced …, 2024 - Taylor & Francis
This study presents the spectral Chebyshev technique (SCT) for nonlinear vibrations of
rotating beams based on a weak formulation. In addition to providing a fast-converging and …

A receptance based method for the calculation of nonlinear normal modes of large ordered structures with distributed localized nonlinearities

H Samandari, E Cigeroglu - International Journal of Non-Linear Mechanics, 2022 - Elsevier
In recent years, the concept of nonlinear normal modes (NNMs) has gained interest for
interpreting a broad range of nonlinear dynamic phenomena. Present study introduces a …

Localization and identification of structural nonlinearities using cascaded optimization and neural networks

A Koyuncu, E Cigeroglu, HN Özgüven - Mechanical Systems and Signal …, 2017 - Elsevier
In this study, a new approach is proposed for identification of structural nonlinearities by
employing cascaded optimization and neural networks. Linear finite element model of the …

A novel two-step pseudo-response based adaptive harmonic balance method for dynamic analysis of nonlinear structures

O Sert, E Cigeroglu - Mechanical Systems and Signal Processing, 2019 - Elsevier
Harmonic balance method (HBM) is one of the most popular and powerful methods, which is
used to obtain response of nonlinear vibratory systems in frequency domain. The main idea …