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Deep water mooring system combining float and weight block

A gravity block and combined technology, applied in the fields of deep water mooring and deep water mooring systems, can solve the problems of difficult dynamic characteristics of cables and fatigue damage of synthetic cables, and achieve the effect of reducing construction difficulty, reducing project cost and enhancing stability.

Inactive Publication Date: 2006-08-02
TIANJIN UNIV
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Disadvantages of polyester cables include: The first pair of anchors puts higher demands on
Second, due to the direct transmission of large tension and periodic wave loads to the anchor foundation, fatigue damage to synthetic cables often occurs
The deformation of the third synthetic cable has no linear relationship with the tension acting on it, and has a significant time characteristic, so it is difficult to directly simulate the dynamic characteristics of the synthetic cable

Method used

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  • Deep water mooring system combining float and weight block
  • Deep water mooring system combining float and weight block

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Embodiment Construction

[0017] The claim of the present invention includes any use of floating bodies and gravity blocks to change the angle between the anchor chain or anchor cable section and the horizontal plane, increase the horizontal stiffness of the anchor chain or anchor cable, change the natural vibration frequency of the mooring system, and increase system damping. The buoyant and gravity block pair mode can be used in all or part of a mooring system. Application of the present invention can effectively equate deep-water moorings into several shallow-water moorings. Wherein the weight of the gravity block can be changed from zero to arbitrarily large, and the buoyancy of the floating body can also be arbitrarily changed as required. Two examples (but not limited thereto) are given below to illustrate the implementation method of the present invention.

[0018] Example 1: Set up a mooring system at a water depth of 2,000 meters, with a total of 12 anchor cables. Each anchor cable is design...

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Abstract

The present invention belongs to the field of deep water mooring technology. One of the deep water mooring system has ordered floats set between anchor base and the anchor chain or anchor cable of the anchored object and weight blocks between each two floats; and one other deep water mooring system has floats and weight blocks between each two floats set in only one part of the anchor chain or the anchor cable. The present invention has the advantages of altered self vibration period of the system, increased horizontal rigidity and damping of the deep water mooring system, reduced the designed bearing capacity of the anchor base, reduced water area the mooring system occupies and no overlarge tension of local anchor chain or cable.

Description

technical field [0001] The invention relates to a deep-water mooring system combining a floating body and a gravity block. It belongs to deep water mooring technology. Background technique [0002] Mooring systems play a vital role in deep sea development projects. The increase of water depth will lead to the increase of self-weight and the decrease of horizontal stiffness (effective horizontal tension) of traditional anchor chain and anchor cable system, so the effectiveness of its anchoring is getting worse and worse. At the same time, the mooring system in the shape of a natural catenary in deep water covers a considerable water area, seriously affecting the laying of local pipelines and cables and the anchoring of other ships in this water area. For this reason, the traditional anchor chain in the shape of catenary has been gradually replaced by tensioned and semi-tensioned polyester anchor cables. Disadvantages of polyester cables include: The first pair of anchors p...

Claims

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Application Information

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IPC IPC(8): B63B21/48
Inventor 于国友
Owner TIANJIN UNIV
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