A Study on the Functional Reliability of Underwater Floating Body Considering the Wear of Joint Clearance

doi:10.11885/j.issn.1674-5086.2020.10.22.03

Abstract

Abstract: Aiming at the problem in system functional reliability caused by the wear of joint clearance between the cable and structure of cable-anchored underwater floating body, a system dynamic model considering the ideal hinge and the wear of joint clearance is established based on the method of Archard adhesion wear calculation and reliability calculation. The dynamic equation and the functional reliability are solved by the multi-scale method and Newmark-$\beta$ method. On this basis, the reliability of surging displacement and roll angle is studied. The results show that with the increase of wear, the contact force of the connection reaches 12.0 times and 5.5 times of the ideal hinge value. When the wear volume is greater than 1.5 mm, the mean value and peak value of the rolling angle of floating body caused by the uncertainty contact state are both greater than the ideal articulated state, and the reliability decreases sharply. When the wear volume is greater than 1.82 mm, the reliability is less than 90%. In the state of clearance contact, the reliability of the transverse surging displacement of the floating body will decrease to a certain extent.

Key words: cable-anchored, underwater floating body, joint clearance, wear, functional reliability

CLC Number:

TE58
TH113.1

HE Kongde, HU Hao, FANG Zifan, YANG Weihua, LIU Shaopeng. A Study on the Functional Reliability of Underwater Floating Body Considering the Wear of Joint Clearance[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(2): 159-169.

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