A Modal Analysis of Giant Shipbuilding Tower Crane

Old giant cranes in corrosive environment are in serious hidden danger of structural instability and failure, the modal analysis is an important part of dynamics analysis in the Crane Safety Evaluation to guarantee the safety of cranes. A Modal Analysis of a 28-year old 100t giant shipbuilding tower...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 239-240; pp. 473 - 477
Main Authors Huang, Guo Jian, He, Cheng Zhong, Wang, Xin Hua
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.01.2013
Subjects
Natural Frequency
Modal Analysis
Modal Shape
Safety Evaluation
Tower Crane
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Summary:Old giant cranes in corrosive environment are in serious hidden danger of structural instability and failure, the modal analysis is an important part of dynamics analysis in the Crane Safety Evaluation to guarantee the safety of cranes. A Modal Analysis of a 28-year old 100t giant shipbuilding tower crane was done using ANSYS. Comparing with the vibration frequencies and modal shapes, Modal analysis shows that the Natural Frequency of the crane reduces from 1.0024Hz to 1.0003Hz, beside all the Modal vibration frequencies (first 10 Order) of the crane are lower than the designed value, means the strength of the tower crane has decreased; the Modal Vibration Frequencies (first 10 Order) of the tower crane are between 1 Hz and 2 Hz. The Mmodal analysis provided theoretical basis for safe use, design and transformation of this crane.
Bibliography:Selected, peer reviewed papers from the 2012 International Conference on Measurement, Instrumentation and Automation (ICMIA 2012), September 15-16, 2012, Guangzhou, China
ISBN:9783037855454
3037855452
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.239-240.473