RESEARCH PAPERS: Power Transmissions and Gearing Papers

Fatigue Design of Racks for Jack-Up Units

[+] Author and Article Information
Hiroshi Honda

Chiba Laboratory, Technical Research and Development Headquarters, Mitsui Engineering and Shipbuilding Company, Ltd., Ichihara City, Chiba Prefecture, 290 Japan

J. Mech., Trans., and Automation 108(3), 403-412 (Sep 01, 1986) (10 pages) doi:10.1115/1.3258748 History: Received June 11, 1985; Online November 19, 2009


The subject paper presents the methods and results of fatigue tests for both torch-cut and machined racks using 40.4 mm module and finite-element elastic stress analyses for these racks. Further, the results of the analysis of fluctuating jack load range distribution over a one-year period for a jack-up rig is presented. The author proposes a fatigue design method of racks for jack-up units based on the foregoing results. The proposed fatigue design method was compared with those of ASME Boiler and Pressure Vessel Code, DNV’s Classification Notes, and the draft proposal of ISO for the strength design of gears, resulting in the conclusion that a single conventional fatigue design method as presented by ASME, ISO and DNV is insufficient for the fatigue design of these racks.

Copyright © 1986 by ASME
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