July 2011 Rope Dynamics
SPECIAL NOTICE: Please check each course for verification of approval before purchasing. This test is based on the article, Rope Dynamics published in the July 2011 issue and counts as two contact hours (0.2 CEU) of elevator-industry continuing-education credit. Most courses are approved by NAEC for CET/CAT and NAESAI for QEI and in the following states: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, Montana, Oklahoma, Pennsylvania, Vermont, Virginia, Washington, West Virginia, Wisconsin. Learning Objectives - After reading this article, you should have learned about:
- How transient vibrations arise
- Why rope vibrations often occur at particular positions in the hoistway
- Why, when considering transient rope vibration, even a high-speed elevator may be treated as if it were stationary
- Why lateral rope vibrations may give rise to longitudinal vibration and vice versa
- Why transient rope vibration may be very difficult to eliminate
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