A Modal Analysis of Giant Shipbuilding Tower Crane

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 239-240)
• Pages: 473-477
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.239-240.473
• Online since: December 2012
• Authors: Guo Jian Huang, Cheng Zhong He, Xin Hua Wang
• Keywords: Modal Analysis, Modal Shape, Natural Frequency, Safety Evaluation, Tower Crane

References

[1] Tinkir M, Kalyoncu M, O X, et al. Modeling and control of scaled a tower crane system. In, Computer Research and Development (ICCRD), 2011 3rd International Conference on; 2011, pp.93-98.

DOI: 10.1109/iccrd.2011.5763861

[2] Lanfeng Y, Ye C, Qiang C, Xiao W. Reliability-based design for the structure of tower crane under aleatory and epistemic uncertainties. In, Quality, Reliability, Risk, Maintenance, and Safety Engineering (ICQR2MSE), 2011 International Conference on; 2011, pp.938-943.

DOI: 10.1109/icqr2mse.2011.5976758

[3] Yang Y, Zhenlian Z, Liang C. Research and Design of Tower Crane Condition Monitoring and Fault Diagnosis System. In, Artificial Intelligence and Computational Intelligence (AICI), 2010 International Conference on; 2010, pp.405-408.

DOI: 10.1109/aici.2010.322

[4] Regulation for Periodicity Inspection of Lifting Appliances (TSG Q7015-2008). In: People's Republic of China State Administration of Quality Supervision, Inspection and Quarantine; 2008, p.3.

[5] Appleton BJA, Patra J, Mohamed Y, AbourRizk S. Special purpose simulation modeling of tower cranes. In: Simulation Conference, 2002. Proceedings of the winter, 2002, pp.1709-1715.

DOI: 10.1109/wsc.2002.1166455

[6] Zhang Y, Zhao J, Yao J. Static structural finite-element analysis of tower crane based on FEM. In, Computing, Control and Industrial Engineering (CCIE), 2011 IEEE 2nd International Conference on; 2011, pp.220-223.

DOI: 10.1109/ccieng.2011.6008106

[7] Quanmin G, Haixian Z. Intelligent Real-Time Monitoring System of Tower Crane Load Moment. In, Intelligent Systems and Applications (ISA), 2011 3rd International Workshop on; 2011, pp.1-4.

DOI: 10.1109/isa.2011.5873340

[8] Weihua YU, Yourong L, Zifan F, Kongde H. Study on dynamic optimum design of tower crane structure. In, Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on; 2011, pp.1660-1663.

DOI: 10.1109/mace.2011.5987273

[9] Song S, Wang J, Qiao C. The study on tower crane foundation slope model based on inclination feature. In, Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on; 2011, pp.900-907.

DOI: 10.1109/cecnet.2011.5768489

[10] Chengzhong He. Study on Dynamic Properties of the Conveyor & Grab Crane Under Offloading Load. In: Wuhan University of Technology; (2010).