Effects of gyroscopic effects on natural frequencies and modes of nipper mechanism on a comber

Chunhua Zhao; Wencheng Tang; Mingming Meng

doi:10.1117/12.839022

24 August 2009 Effects of gyroscopic effects on natural frequencies and modes of nipper mechanism on a comber

Chunhua Zhao, Wencheng Tang, Mingming Meng

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73750I (2009) https://doi.org/10.1117/12.839022
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Natural frequencies and modes of Nipper Mechanism on Comber in motion are studied in this paper with emphasis on the effects of gyroscopic effects. They are assumed to be different from those calculated based on assumptions of instantaneous structure, neglecting the coupling of rigid body motion and elastic deformation, and so on, which is not examined. In this study, finite element method is applied to simulate flexible links with those assumptions dropped and gyroscopic effects is thus included due to the consideration of the coupling of rigid body motion and elastic deformation. State space approach is applied to translate the second order differential equations into the first order with double degrees of freedom. Because of the positive definition of global mass and stiffness matrix, Cholesky can be used to obtain the standard gyroscopic eigenvalue equations which can be solved easily. Comparisons show that natural frequencies affected by gyroscopic effects are growing quickly with the speed increasing, especially for the third natural frequency which is much higher than that of simplified model. Therefore, much care needs to be taken when calculating frequencies of mechanisms with high speeds and light weight.

Citation Download Citation

Chunhua Zhao, Wencheng Tang, and Mingming Meng "Effects of gyroscopic effects on natural frequencies and modes of nipper mechanism on a comber", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73750I (24 August 2009); https://doi.org/10.1117/12.839022

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available