舭龙骨上的这些开孔是干什么用的？

tosako · 发表于 2012-2-15 20:12

不知道。但不是止裂孔。

jlcsscgls · 发表于 2012-2-16 21:47

减少舭龙骨与船体的接触降低海损时舭龙骨撕裂对外班的的影响说白了就是为保护船体外板用的

691603824 · 发表于 2012-2-17 19:39

看来说不是止裂孔的占多数

愿我能 · 发表于 2012-2-17 21:30

现在的舭龙骨，没有一整根的了吧！！我们厂的，全是分段的啊！

fld361525145 · 发表于 2012-2-17 21:31

确实是止裂孔，好像有点多

376421955 · 发表于 2012-2-18 11:14

好像是止裂孔吧

1520 · 发表于 2012-2-19 18:39

是止裂孔的样子，问题是间隔太小数量太多……雷倒！

laotandelc · 发表于 2012-2-20 14:02

没有确切的答案么

龙@船@人 · 发表于 2012-2-20 19:42

按照我的想法：这些空有2个作用：
1.起到止裂孔的作用。
2.减少应力集中。防止船横摇时水阻力过大，撕裂舭龙骨，其实就是起到一定的透水作用，横摇只能减缓，不能阻止。

刺猬不伤人 · 发表于 2012-3-2 13:37

SWC 发表于 2009-7-10 22:29
现在舭龙骨一般采用球扁钢或球扁钢下口搭接一块扁钢组合而成：
1、舭龙骨采用复板和外板连接，复板宽度~10 ...

非常好的解释

陈沐 · 发表于 2012-3-3 18:47

此船是不是要在冰区航行？

刺猬不伤人 · 发表于 2012-3-6 11:51

没见过这大的，是不是在尾部啊？如果是尾部的话，有可能是导流孔！止裂孔大家都说了，看标准就可以了

sandypan · 发表于 2012-3-6 13:30

123dodo 发表于 2011-10-5 10:44
这个开口应该是错误的，通常舭龙骨只在扁钢对接的焊缝离舭列板40mm处开D20mm的止裂孔。

同意你的说法，应该是错误的，根据CSR的要求不能有除止裂空以外的空。
6.5.2 Bilge keel
Bilge keels are not be welded directly to the shell plating. An intermediate flat is required on the shell plating.
The ends of the bilge keel are to be sniped as shown in Fig.18 or rounded with large radius. The ends are to be
located in way of transverse bilge stiffeners inside the shell plating and the ends of intermediate flat are not to be
located at the block joints.
The bilge keel and the intermediate flat are to be made of steel with the same yield stress as the one of the bilge
strake. The bilge keel with a length greater than 0.15L is to be made with the same grade of steel as the one of
bilge strake.
The net thickness of the intermediate flat is to be equal to that of the bilge strake. However, this thickness may
generally not be greater than 15 mm.
Scallops in the bilge keels are to be avoided.

13 Bilge Keels
Bilge keels where fitted, are to be attached to the shell by a doubler. In general, both the bilge keel and the
doubler are to be continuous. The connections of the bilge keel to the doubler and the doubler to the shell,
are to be by double continuous fillet welds.
Butt welds in the bilge keel and doubler are to be full penetration and are to be kept clear of master
erection butts. In general, shell butts are to be flush in way of the doubler, and doubler butts are to be flush
in way of the bilge keel. In general, scallops and cutouts are not to be used. Where desired, a drilled crack
arresting hole, at least 25 mm (1 in.) in diameter, may be provided in the bilge keel butt weld as close as
practicable to the doubler.
The ends of the bilge keel are to be suitably tapered and are to terminate on an internal stiffening member.
The material tensile properties for bilge keels and doublers are to be as required for the bottom shell
plating.

船体精控者 · 发表于 2012-3-7 20:26

止裂孔应该是，主要是设计强度

CENYI · 发表于 2012-3-14 16:29

止裂孔是在焊缝上的吧！！这个孔应该是排水的！！我是第一次看到！！一些大的船厂都没有这样的！！

fengvhong · 发表于 2012-4-23 11:08

不是止裂孔，是为了消除应力集中，所以才开此孔！

franlxj · 发表于 2012-4-30 21:53

主要是让舭龙骨不参加船体结构的总纵强度的

zhaoxiaoqi · 发表于 2012-4-30 22:03

流水孔，防止剧烈横摇。

liangjun830305 · 发表于 2012-5-1 21:22

降低舭龙骨强度，避免受力过大损坏时牵连外板。问问设计，应该是这么个功能。

liangjun830305 · 发表于 2012-5-1 21:22

降低舭龙骨强度，避免受力过大损坏时牵连外板。问问设计，应该是这么个功能。

[船体] 舭龙骨上的这些开孔是干什么用的？