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Abstract
There are two main subjects of this work: Kinematic and dynamic modeling and
analysis of roller chain drives. In the kinematic analysis we contribute first with a
complete treatment of the roller chain drive modeled as a four-bar mechanism. This
includes a general, exact and approximate analysis with a clear derivation of the
seating and release configurations, as well as the driven sprocket angular position,
velocity and discontinuous acceleration. The approximate analysis allows for simple
expressions describing the seating and release configurations and shows the influence
of main design parameters which is useful for predicting the characteristic loading
of the roller chain drive. As a completely novel contribution, a kinematic model
and analysis is presented which includes both spans and sprockets in a simple chain
drive system. A general procedure for determination of the total wrapping length
is presented, which also allows for exact sprocket center positions for a chain with a
given number of links. Results show that the total chain wrapping length varies
periodically with the tooth frequency. These results are of practical importance to
both the design, installation and operation of roller chain drives.
For the analysis of roller chain drive dynamics we present a novel model of a chain
drive that couples the vibrations of the chain spans and the driven sprocket. This
also includes contributions to the studies of axially moving materials, as the chain
is modeled as a string with a variable length supported by moving boundaries.
A stationary operating state is introduced for the dynamic model and employing
a perturbation method for the analysis of the approximate model results show a
multitude of internal and external resonance conditions, thereby identifying critical
operating conditions for real chain drives. Examples are presented of both decoupled
and coupled motion. Together, the kinematic and dynamic model and analytical
results provides a framework for numerical and experimental investigations of roller
chain drive motion and deepens the understanding of roller chain drive operation.
Original language | English |
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Publisher | DTU Mechanical Engineering |
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Number of pages | 200 |
ISBN (Electronic) | 978-87-7475-399-5 |
Publication status | Published - 2014 |
Series | DCAMM Special Report |
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Number | S175 |
ISSN | 0903-1685 |
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Dive into the research topics of 'Kinematics and Dynamics of Roller Chain Drives'. Together they form a unique fingerprint.Projects
- 1 Finished
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Rullekæders Dynamik: Teoretisk Modellering og Analyse
Fuglede, N., Thomsen, J. J., Høgsberg, J. B., Fidlin, A. & Eberhard, P.
Technical University of Denmark
01/01/2010 → 19/03/2015
Project: PhD