遼寧東寶38萬噸散貨總段分段氣囊下水施工方案計劃書

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一、38萬噸散貨船分段技術(shù)參數(shù)：SHIP SECTION PARTICULARS

分段長度LENGTH：65M

分段型寬WIDTH：25、28M米各一個EACH（按25米計算ACCORDING TO 25M）

分段型深DEPTH：30米M

分段重量WEIGHT：04#：W=3958.86T   05#:W=3818.01T

重心高度GM：04#:G=13.56M   05#:G=13.89M

設(shè)計吃水DRAFT：04#:T=2.11M  05#:=2.34M

坡道SLOPE:1:80  1:60  1:28  1:14

二、幾點建議SUGGESTIONS

1、建造墩的高度不能超過0.90米.

   SUPPORTING BLOCK WILL BE LESS THAN 0.9M

2、增設(shè)三組50T錨點和兩組20T卷揚機錨點（見圖）。

   ADD 3 50T TOWING POINT AND 2 SET WINCH(SEE THE DRAWING)

3、建造墩的位置應(yīng)橫平豎直，間距不小于3米，便于布設(shè)氣囊。

   SUPPORTING BLOCK WILL BE CROSSVISE ,THE SPACE WILL BE MORE THAN 3M.

三：船體下水過程中氣囊基本數(shù)據(jù)：AIRBAG PARTICULAR AT LAUNCHING

1、 施工中擬采用50條直徑1.80米,長度10米高壓氣囊，其中34條頂升及滾動作業(yè)，16

DURING THE PROCRSS OF LUNCHING SECTING THE AIR BAG WILL USE 50PCS DIA:1.8M.LENGTH 10M.AND 30 PCS WILL ACT AS LIFTING AND ROLLING,17PCS WILL WORK AS LINK.

條氣囊備用倒接，每條氣囊承載負荷為W。按34條整體頂升計算。  

PER AIRBAG LOADING STRESS WILL BE “W”.THEN CALCULATE THE TOTAL STRESS:

   W頂=  G/N  = 4200T/34條  =123.5T/條

  “W”SUPPORTING”= G/N  = 3960T/34PCS  =116.4T/PC

G：船體總質(zhì)量    N：實際承載氣囊數(shù)量

G:TATAL SECTION WEIGHT  NUANTITY OF AIRBAG

2、 頂升撤墩作業(yè)，氣囊工作狀態(tài)。（建造墩高度90cm按頂升高度95cm，氣囊按Φ1.8×10m核算）

LIFTING AND TAKE OUT PEDESTAL WHEN AIRBAG IS WORKING. (THE DESIGN HEIGHT OF PEDESTAL IS 90cm WHILE LIFTING HEIGHT IS 95cm. THE SIZE OF AIRBAG IS Φ1.8×10m)

3、

名稱NAME	規(guī)格SPECIFICATION   (M)	氣囊承載面寬度THE WIDTH OF BASE（M）	數(shù)量NUMBER（條TAPE）	條氣囊舉力LIFTING CAPACITY OF PER TAPE AIRBAG(T)	實際工作壓強ACTUAL WORKING PRESSURE (MPa)	額定工作壓強RATED WORKING PRESSURE (MPa)
船舶工程專用氣囊THE SPECIFAL AIFBAG OF SHIP ENGINEERING	Φ1.8×10M	1.34	34	116.4	0．09	0.11

結(jié)論：氣囊頂升作業(yè)中，實際承受的壓強小于額定工作壓力，故頂升操作安全可靠。

CONCLUSION: LIFTING OPERATE IS SAFE AND RELIABLE BECAUSE ACTUAL WORKING PRESSURE OF AIR BAG IS LOWER THAN RATED PRESSURE.

3、前移作業(yè)氣囊工作狀態(tài)（按運行高度80cm核算）

FC=Q.g.sinα-μ.Q.g.COSα+Q.V/T

Q    船體重量 SHIP WEIGHT    KN

g    重力加速度 ACCELERATION OF GRAVITY  9.8

Nc          為滑輪組鋼絲繩道數(shù)；THE NUMBER OF STEEL WIRE ROPE OF ASSEMBLY PULLEY

β   為鋼絲繩與坡道牽引夾角。THE ANGLE BETWEEN THE ROPE AND RAMP.

α   坡道水平夾角0.72度RAMP ANGLE  0.72°

μ   氣囊滾動摩擦系數(shù)ROLLING FRICTION COEFFICIENT OF AIRBAG (0.01-0.015)

船體重量SHIP WEIGHT：3900噸TON         

分段在1：80的坡道上 ， 下滑力:487.5KN

SECTION IN THE RAMP OF 1:80, SLIDING FORCE: 487.5KN

分段在1：60的坡道上 ， 下滑力:650KN

SECTION IN THE RAMP OF 1:60, SLIDING FORCE: 650KN

在實際的操作中，由于受氣囊角度、壓力、風(fēng)向、風(fēng)力等外界方面影響，氣囊的滾動

摩擦系數(shù)μ在0.01-0.015之間變化.且船體由靜態(tài)變?yōu)閯討B(tài)時要克服靜摩擦需要較大的外力。

THE ROLLING FRICTION COEFFICIENT OF AIFBAG CHANGES IN BETWEEN 0.01-0.015 BECAUSE OF THE EFFECT OF BALLOON ANGLE, PRESSURE, WIND POWER AND WIND DIRECT ECT. THIS NEEDS A LARGER FORCE WHEN SHIP MOVES FROM STATIC.

分段在1:80的坡道上SECTION IN THE RAMP OF 1:80

1、 摩擦系數(shù)μ取0.01時WHEN FRICTION COEFFICIENT IS 0.01

下滑力SLIDING FORCE:487.5KN

摩擦力FRICTION FORCE:390 KN  

后牽力REAR TRACTIVE FORCE：97.5KN

2、摩擦系數(shù)μ取0.015時WHEN FRICTION COFFICIENT IS 0.015

下滑力SLIDING FORCE:487.5KN

摩擦力FRICITON FORCE:585KN  

后牽力REAR TRACTIVE FORCE：-97.5KN（需前牽TRACTIVE FORCE IN FORE）

分段在1:60的坡道上SECTION IN THE RAMP OF 1:60

1、摩擦系數(shù)μ取0.01時WHEN FRICTION COFFICIENT IS 0.01

下滑力SLIDING FORCE:650KN

摩擦力FRICTION FORCE:390 KN  

后牽力REAR TRACTIVE FORCE：260KN

2、摩擦系數(shù)μ取0.015時WHEN FRICTION COFFICIENT IS 0.015

下滑力SLIDING FORCE:650KN

摩擦力FRICTION FORCE:585KN  

后牽力REAR TRACTIVE FORCE：65 KN

在下水操作過程中安全期間后牽取最大值260KN

FOR SAFETY DURING OPERATEING IN THE WATER, THE REAR TRACTIVE FORCE WITH MAXIMUM 260KN

主后牽卷揚機MAIN REAR TRACTIVE WINCH：200 KN，鋼索道數(shù)NUMBER OF CABLE：3道TAPE，總牽引力GROSS TRACTIVE FORCE :600kN

600KN÷260KN=2.30倍TIMES(標準為1.25倍STANDARD IS 1.25 TIMES)

下水速度SPEED OF SHIP LAUNCHING：1. 0米/分m/min

結(jié)論: 在1：80坡道上分段需要前牽，在1：60坡道上后牽力滿足需要。

CONCLUSION: IT NEEDS FRONT TRACTIVE IN THE SECTION OF 1:80 RAMP, REAR TRACTION IN SECTION OF 1:60RAMP.

四：準備工作PREPARATION WORK

1：船體牽引點設(shè)置SET TRACTIVE POSITION OF HULL

下水分段尾部（習(xí)慣上入水端為首部）強結(jié)構(gòu)上設(shè)計兩個50噸眼板做為主后牽，高度在3米左右，間距大于1米小于4米。在下水船體一側(cè)（左右都可，與卷揚機位置一致）船艉10米的位置設(shè)一個35T眼板，做為主前牽，高度在3米左右的強結(jié)構(gòu)上。

DESIGN TWO 50t EYE BRACKETS IN THE STRONG STRUCTURE OF TAIL OF SHIP SECTION LAUNCHING. (GENERALLY THE LAUNCHING END IS CALLED HEADER). THE HEIGHT OF EYE BRACKET IS 3m; SPACE IS BETWEEN 1-4m. SET A 35t EYE BRACKETS AS MAJOR FRONT TRACTION IN THE STRONG STRUCTURE OF SECTION SIDE (LEFT OF RIGHT, ON THE SAME SIDE WITH WINCH).

2：卷揚機固定錨點的設(shè)置SET THE POSITION FOR FIXING OF WINCH.

見拖曳示意圖 SEE THE PICTURE OF DRAGGING

3：浮態(tài)計算FLOATING STATE CALCULATION

按葫蘆島五、六、七、八、九、十月份當?shù)卮蟪背备?.50米左右，安全期間按3.30米計算，入水端吃水2.353米時浮力距等于重力距,船體艉浮.全浮位置在重心運行到1：14坡道標高1.46米位置.(見附圖)

IN HULUDAO, IN MAY, SPRING TIDES IS ABOUT 3.50m HIGH IN JULY AUGUST SEPTEMBER OCTOBER. FOR SAFETY, SET HEIGHT OF TIDE 3.30m, LAUNCHING LENGTH IS 111.3m. BUOYANCY DISTANCE IS GREATER THAN GRAVITY TOUQUE. THE HULL IS FULL FLOATING WHEN THE WATER-SIDE DRAFT 3.56m. THE FULL FLOATING POSITION IN THE BARYCENTRE RUN TO THE 1:14 RAMP AND ELEVATION OF 1.46m (SEE PHOTO)