The effect of curvic coupling joints on the roto rdynamic characteristics of gas turbines with tie-shaft

Name: The effect of curvic coupling joints on the roto rdynamic characteristics of gas turbines with tie-shaft
Author: Şimşek, Uğur, Şendur, Polat, Yaşar, A.

İsim	The effect of curvic coupling joints on the roto rdynamic characteristics of gas turbines with tie-shaft
Yazar	Şimşek, Uğur, Şendur, Polat, Yaşar, A.
Basım Tarihi:	2019
Basım Yeri	- Canadian Acoustical Association
Konu	Curvic couplings, Lateral vibrations, Linear perturbation, Modal analysis, Rotordynamics
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	978-199918100-0
Kayıt Numarası	c6c45968-04cc-4852-b0fe-729ee8ced485
Lokasyon	Mechanical Engineering
Tarih	2019
Örnek Metin	The importance and use of curvic coupling joints are garnering interest in many aero-engine rotordynamics applications thanks to their benefits such as lower stress, higher service life, reliable positioning, precise centering and strong loading capability. Their predominant application is in the assembly of the rotating elements such as shafts, impellers and turbine discs in order to mainly provide torque transmission in high-speed rotating machines. In order to predict rotor dynamic behavior of the rotor systems, specialized one dimensional (1D) finite element codes are generally preferred due to their computational efficiency. However, the effect of the curvic couplings is usually ignored in traditional rotor dynamics analysis due to their complex geometry. This approach may lead to inaccurate calculations especially at higher speeds. In this study we compare the dynamic characteristics of continuous and discontinuous curvic coupling joints on a single stage compressor-turbine rotor system with tie-bolt design. The first four lateral natural frequencies are calculated and compared for each case by using three dimensional (3D) finite element models considering the contact effect via modal analysis with linear perturbation method. Results show that curvic couplings reduce the natural frequencies of rotor system at all rotating speeds under preload and centrifugal forces. Finally, a sensitivity analysis under separation loading is examined in which higher frequency shifting and mode shape changes are observed.

Kaynağa git Özyeğin Üniversitesi

Aramaya Dön

Özyeğin Üniversitesi

Kaynağa git

The effect of curvic coupling joints on the roto rdynamic characteristics of gas turbines with tie-shaft

Yazar Şimşek, Uğur, Şendur, Polat, Yaşar, A.

Basım Tarihi 2019

Basım Yeri - Canadian Acoustical Association

Konu Curvic couplings, Lateral vibrations, Linear perturbation, Modal analysis, Rotordynamics

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 978-199918100-0

Kayıt Numarası c6c45968-04cc-4852-b0fe-729ee8ced485

Lokasyon Mechanical Engineering

Tarih 2019

Örnek Metin The importance and use of curvic coupling joints are garnering interest in many aero-engine rotordynamics applications thanks to their benefits such as lower stress, higher service life, reliable positioning, precise centering and strong loading capability. Their predominant application is in the assembly of the rotating elements such as shafts, impellers and turbine discs in order to mainly provide torque transmission in high-speed rotating machines. In order to predict rotor dynamic behavior of the rotor systems, specialized one dimensional (1D) finite element codes are generally preferred due to their computational efficiency. However, the effect of the curvic couplings is usually ignored in traditional rotor dynamics analysis due to their complex geometry. This approach may lead to inaccurate calculations especially at higher speeds. In this study we compare the dynamic characteristics of continuous and discontinuous curvic coupling joints on a single stage compressor-turbine rotor system with tie-bolt design. The first four lateral natural frequencies are calculated and compared for each case by using three dimensional (3D) finite element models considering the contact effect via modal analysis with linear perturbation method. Results show that curvic couplings reduce the natural frequencies of rotor system at all rotating speeds under preload and centrifugal forces. Finally, a sensitivity analysis under separation loading is examined in which higher frequency shifting and mode shape changes are observed.