BV船级无限航区拖轮舾装数计算书(Equipment Number Calculation).doc

REVISION RECORD 修改记录REVISION 版本REVISION BASIS 修改依据REVISER 修改人DATE 日期REMARK 备注Subject题图：EQUIPMENT NUMBER CALCULATION舾装数计算书Designed 编制Fiona YanChecked 校对Appved 审核Date 日期2012.10.09Ship name 船名：Pages 页数334m TUG34m拖轮Approval design Drawing NO：YF-2012-XYF110-H35Equipment Number CalculationThe equipment number of the ship complies with the requirement in Ch 10,Sec 4 of BUREAU VERITAS.1. According to 2.1.2,we can see the formula as follows:EN=2/3+2hB+0.1A= 219.49Where:Moulded displacement： =728.10Freeboard： a = 1.20mDraft: d = 3.50mBreadth: B=10.00m h=a+hn=1.20+2.45+2.7= 6.35mA=83.76+15.47+16.35= 115.58m22. Obtained from Tab 1, we learn that the number of anchors is three, and the mass of each anchor is 660 kg.3. According to 3.1.3, Where HHPanchors are used as bower anchors,the mass of each anchor is to be not less than 75% or 50%,respectively,of that required for ordinary stockless bower anchors in Tab 1.So:6600.75 = 495kg ,the mass of each bower anchor is equal to 495 kg. 4. Total mass of anchors to comply with total mass from table 1,as oer 3.2.2. Total mass to be 1485KG+ 5. Obtained from Tab 1, we also learn that the diameters of the chain cables are 26 mm for Q1 chain or 22 mm for Q2 chain in the ship. The total length of the chain cables is 302.5m.6. According to Tab 3, the breaking load of each towline is 129KN, and there is one steel wire whose length is 180m. Meanwhile, the breaking load of each mooring li