JPS58115494U

JPS58115494U - composite mooring line

Info

Publication number: JPS58115494U
Application number: JP1255982U
Authority: JP
Inventors: 賢一宇ノ木; 正敏片山
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 1982-02-02
Filing date: 1982-02-02
Publication date: 1983-08-06
Also published as: JPH0229039Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す側面図、第２図は第１
図においてスラツク状態の複合像を、第３図は第２図に
おいて上端を水平にδだけ変位したときの複合像をそれ
ぞれ示す側面図、第４図は□６−ｏ、２．全一２．０と
した場合の複合像の（水平変位δ）／（水深ｈ）と（張
力Ｆ）／（上部索水中重量　　、Ｗｌ）×（水深ｈ）と
の関係を示す係留特性線図、第５図は第４図に゛おいて
、会を０．２５〜５．０と口た　　　゛場合の複数の線
図に基づいて初期張力の極小値を示す線図、第６図は第
５図の初期張力の極小値に基づいて複合像の（破断強度
ＢＳ）／（安全率ＳＦ、ｉ）★（上部索水中重量Ｗ１）
Ｘ（水深ｈ）と（上部索長ＳＬ）／（水深ｈ）との関係
を示す線画である。１・・・水面、２・・・浮体、３・・・複合係留索、４
・・・アンカー、５・・・海底、６・・・上部索、７・
・・下部索、８・・・連結手段、Ｗｌ・・・上部索の単
位長当りの水中重量、Ｗ２・・・下部索の単位長当りの
水中重量、Ｓｌ・・・上部索の長さ、Ｓ２・・・下部索
の長さ、ｈ・・・水深、命“・・・無次元重量比Ｗ　、
／Ｗ２、会・・・無次元索長比Ｓ、／ｈ、会・・・無次
元張力ＦＩＷ、ｈ、δ・・・水平変位量１．◇・・・無
次元水平変位−Ｆ・・・複合像め張力、ＢＳ・・・複合
像の破断強度、ＳＦα・・・安全率。Fig. 1 is a side view showing one embodiment of the present invention, and Fig. 2 is a side view showing an embodiment of the present invention.
The figure shows a composite image in a slack state, FIG. 3 is a side view showing a composite image when the upper end is horizontally displaced by δ in FIG. 2, and FIG. 4 is a side view of □6-o, 2. Mooring characteristic diagram showing the relationship between (horizontal displacement δ) / (water depth h) and (tension F) / (upper cable weight, Wl) × (water depth h) of the composite image when the total weight is 2.0 , Figure 5 is a diagram showing the minimum value of the initial tension based on multiple diagrams in Figure 4 when the relationship is between 0.25 and 5.0, and Figure 6 is a diagram showing the minimum value of the initial tension. (Breaking strength BS)/(Safety factor SF, i)★(Upper cable weight W1) of the composite image based on the minimum value of the initial tension in Figure 5
It is a line drawing showing the relationship between X (water depth h) and (upper cable length SL)/(water depth h). 1... Water surface, 2... Floating body, 3... Composite mooring line, 4
... Anchor, 5... Seabed, 6... Upper rope, 7.
...Lower cable, 8...Connection means, Wl...Underwater weight per unit length of upper rope, W2...Underwater weight per unit length of lower rope, Sl...Length of upper rope, S2... Length of the lower rope, h... Water depth, Life "... Dimensionless weight ratio W,
/W2, Kai...Dimensionless cable length ratio S, /h, Kai...Dimensionless tension FIW, h, δ...Horizontal displacement amount 1. ◇...Dimensionless horizontal displacement -F...Composite image tension, BS...Composite image breaking strength, SFα...Safety factor.

Claims

[Claims for Utility Model Registration] In a composite mooring cable formed by connecting an upper rope and a lower rope in series, each having a different underwater weight, the ratio of the length of the upper rope to the water depth is defined as the (breaking strength) of the composite mooring rope. (safety ratio)
The following range for the ratio of × (underwater weight of upper rope) × (water depth): (breaking strength) (length of Ji′a) upper rope (safety factor) Weight in water 0-3 0.8-1.6 3-5 1.4-2.0 5-7 -1. =L-2.2 7-10 1.8-2.4 10-13 2.0-2.6 13-16 2.2-2.8 16-19 2.2-3.0 19-23 2 .6 to 3.2 23 or more 2.6 to 3.4 A composite mooring rope.