0
Technical Briefs

Dynamic Ice Force Analysis on a Conical Structure Based on Direct Observation and Measurement

[+] Author and Article Information
Ning Xu

National Marine Environmental Monitoring Center,
Dalian 116023, China
State Key Laboratory of Structural Analysis
of Industrial Equipment,
Dalian University of Technology,
Dalian 116023, China

Qianjin Yue

Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received April 5, 2010; final manuscript received October 1, 2013; published online November 12, 2013. Assoc. Editor: Longbin Tao.

J. Offshore Mech. Arct. Eng 136(1), 014501 (Nov 12, 2013) (6 pages) Paper No: OMAE-10-1031; doi: 10.1115/1.4025622 History: Received April 05, 2010; Revised October 01, 2013

In order to study dynamic ice force induced by ice-structure interaction, we adopted the most reliable method to directly measure ice force on full-scale structure. This paper mainly demonstrates the qualitative description on the basic model for dynamic ice forces based on direct measurement on the jackets with ice-breaking cone in the Bohai Sea. Temporal variations of ice force are recorded by the ice load panels, and corresponding ice failure processes on conical structures are recorded by video camera. It is found that, when an ice sheet acts on the upward narrow cone, bending failure occurs and broken ice pieces are completely cleared up by the side of the cone. The basic form of dynamic ice force in time domain is a series of impulse signals with minimum load of zero.

FIGURES IN THIS ARTICLE
<>
Copyright © 2014 by ASME
Topics: Ice
Your Session has timed out. Please sign back in to continue.

References

Blenkarn, K. A., 1970, “Measurements and Analysis of Ice Forces on Cook Inlet Structures,” Proc. Offshore Technology Conference, Houston, TX, Paper No. OTC 1261.
Maattanen, M., Reddy, D., Arockiasamy, M., and Cheema, P., 1977, “Ice-Structure Interaction Studied on a Lighthouse in the Gulf of Bothnia Using Response Spectrum and Power Spectral Density Function Analyses,” Proc. 4th International Conference on Port and Ocean Engineering under Arctic Conditions, St. John's, Newfoundland, Canada, pp. 321–334.
Nordlund, O. P., Karna, T., and Järvinen, E., 1988, “Measurements of Ice-Induced Vibrations of Channel Markers,” Proc. 9th IAHR Ice Symposium, Sapporo, Japan, pp. 537–548.
Brown, T. G., 1997, “The Confederation Bridge-Early Results From Ice Monitoring Program,” Proc. CSCE Annual Conference, Sherbrooke, Canada, Vol. 1, pp. 177–186.
Yue, Q. J., and Bi, X. J., 1998, “Full-Scale Test and Analysis of Dynamic Interaction Between Ice Sheet and Conical Structure,” Proc. 14th International Association for Hydraulic Research (IAHR) Symposium on Ice, Vol. 2, pp. 939–945.
Yue, Q. J., Bi, X. J., Sun, B., Zhang, T., and Chen, X., 1996, “Full Scale Force Measurement on JZ20-2 Platform,” Proc. IAHR Ice Symposium, Beijing, China, pp. 282–289.
Yue, Q. J., and Bi, X. J., 2000, “Ice-Induced Jacket Structure Vibrations in Bahia Sea,” J. Cold Reg. Eng., 14(2), pp. 81–92. [CrossRef]
Timco, G., and Johnston, M., 2003, “Ice Loads on the Molikpaq in the Canadian Beaufort Sea,” Cold Reg. Sci. Technol., 37, pp. 51–68. [CrossRef]
Sodhi, D. S., 1987, “Dynamic Analysis of Failure Modes on Ice Sheets Encountering Sloping Structures,” Proc. 6th International Conference on Offshore Mechanics and Arctic Engineering, Houston, TX, Vol. 4, pp. 281–284.
Izumiyama, K., Kitagawa, H., Koyama, K., and Uto, S., 1991, “On the Interaction Between a Conical Structure and Ice Sheet,” Proc. 11th International Conference on Port and Ocean Engineering under Arctic Conditions (POAC), St. John's, Canada, September 24–28, pp. 155–166.
Nevel, D. E., 1992, “Ice Forces on Cones From Floes,” Proc. 11th IAHR Ice Symposium, Banff, Alberta, Canada, Vol. 3, pp. 1391–1404.
Maattanen, M., Hoikkanen, A. N., and Avis, J., 1996, “Ice Failure and Ice Loads on a Conical Structure Kemi-1 Cone Full Scale Ice Force Measurement Data Analysis,” Proc. 13th International Symposium on Ice (IAHR), Beijing, China, Vol. 1, pp. 8–17.
Mayne, D. C., and Brown, T. G., 2000, “Comparison of Flexural Failure Ice-Force Models,” Proc. 19th International Conference on Offshore Mechanics and Arctic Engineering, New Orleans, LA, Paper No. P&A1009.
Shkhinek, K., and Uvarova, E., 2001, “Dynamics of the Ice Sheet Interaction With the Sloping Structure,” Proc. 16th International Conference on Port and Ocean Engineering Under Arctic Conditions, Ottawa, Canada, Vol. 2, pp. 639–648.
Qu, Y., and Yue, Q. J., 2003, “Analysis of Ice Sheet Break Period and Length on the Ice-Breaking Cone,” J. Glaciol. Geocryol., 25(2), pp. 326–329. [CrossRef]
Qu, Y., 2006, “Random Ice Load Analysis on Offshore Structures Based on Field Tests,” Ph.D. thesis, Dalian University of Technology, Dalian, China.
Xu, N., and Yue, Q. J., 2011, “Mitigation of Ice-Induced Vibrations by Adding Cones,” Int. J. Offshore Polar Eng., 21(1), pp. 56–60.
Qu, Y., Yue, Q. J., Bi, X. J., and Karna, T., 2006, “A Random Ice Force Model for Narrow Conical Structures,” Cold Reg. Sci. Technol., 45, pp. 148–157. [CrossRef]
Li, F., and Yue, Q. J., 2005, “Qualitative Analysis of Ice Forces on Conical Structures Under Different Failure Modes,” J. Dalian Univ. Technol., 45(6), pp. 785–789.
Xu, N., 2011, “Research on Ice Force of Conical Offshore Structures,” Ph.D. thesis, Dalian University of Technology, Dalian, China.

Figures

Grahic Jump Location
Fig. 1

The JZ20-2 MUQ platform and schematic diagram of the measurement system

Grahic Jump Location
Fig. 2

Physical model of ice load panel

Grahic Jump Location
Fig. 3

Ice load panels on JZ20-2 MUQ platform

Grahic Jump Location
Fig. 4

Ice force recorded by the load panels on JZ20-2 MUQ platform

Grahic Jump Location
Fig. 5

Ice-cone interaction process

Grahic Jump Location
Fig. 6

Ice force variation during the interaction between the ice and cone

Grahic Jump Location
Fig. 7

Ice force press on a cone-shaped structure

Grahic Jump Location
Fig. 8

Ice bending failure against the narrow cone

Grahic Jump Location
Fig. 9

Broken ice removing styles during clearing process

Grahic Jump Location
Fig. 10

Ice-induced structure vibration before piling up

Grahic Jump Location
Fig. 11

Ice-induced structure vibration after piling up

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In