【法规名称】
【法规编号】 58774 什么是编号？
【正 文】
第4页 CAP 369AT MERCHANT SHIPPING (SAFETY) (SUBDIVISION AND DAMAGE STABILITY OF CARGO SHIPS) REGULATION
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[接上页] 6. Wherever wing compartments are fitted, contribution to the summation indicated by the formula shall be taken for all cases of flooding in which wing compartments are involved, and additionally, for all cases of simultaneous flooding of a wing compartment or compartments and the adjacent inboard compartment or compartments, assuming a rectangular penetration which extends to the ship's centreline, but excludes damage to any centreline bulkhead. 7. The assumed vertical extent of damage is to extend from the baseline upwards to any watertight horizontal subdivision above the waterline or higher. However, if a lesser extent will give a more severe result, such extent is to be assumed. 8. If pipes, ducts or tunnels are situated within assumed flooded compartments, arrangements are to be made to ensure that progressive flooding cannot thereby extend to compartments other than those assumed flooded. However, the Certifying Authority may permit minor progressive flooding if it is demonstrated that its effects can be easily controlled and the safety of the ship is not impaired. 9. In the flooding calculations carried out according to this Schedule, only one breach of the hull need be assumed. PART III CALCULATION OF FACTOR "pi" 1. The factor "pi" shall be calculated according to paragraph 1.1 as appropriate, using the following notations- x1 = the distance from the aft terminal of "Ls" to the foremost portion of the aft end of the compartment being considered;x2 = the distance from the aft terminal of "Ls" to the aftermost portion of the forward end of the compartment being considered;E1 = x1/Ls E2 = x2/Ls E = E1 + E2 - 1 J = E2 - E1 J' = J - E, if E≧0 J' = J + E, if E<0 The maximum nondimensional damage length Jmax = 48/Ls, but not more than 0.24. The assumed distribution density of damage location along the ship's length a = 1.2 + 0.8E, but not more than 1.2. The assumed distribution function of damage location along the ship's length F = 0.4 + 0.25E(1.2 + a) y = J/Jmax p = F 1 Jmax q = 0.4F2(Jmax)2 F1 = y2 - y3/3, if y<1, F1 = y - 1/3 otherwise; F2 = y3/3 - y4/12, if y<1, F2 = y2/2 - y/3 + 1/12 otherwise. 1.1 The factor "pi" is determined for each single compartment. 1.1.1 Where the compartment considered extends over the entire ship length, "Ls"- pi = 1 1.1.2 Where the aft limit of the compartment considered coincides with the aft terminal- pi = F + 0.5ap + q 1.1.3 Where the forward limit of the compartment considered coincides with the forward terminal- pi = 1 - F + 0.5ap 1.1.4 When both ends of the compartment considered are inside the aft and forward terminals of the ship length, "Ls"- pi = ap 1.1.5 In applying the formulae of paragraphs 1.1.2, 1.1.3 and 1.1.4, where the compartment considered extends over the "mid-length", these formulae values shall be reduced by an amount determined according to the formula for "q", in which "F2" is calculated taking "y" to be J'/Jmax. 2. Wherever wing compartments are fitted, the "pi" value for a wing compartment shall be obtained by multiplying the value, as determined in paragraph 3, by the reduction factor "r" according to paragraph 2.2, which represents the probability that the inboard spaces will not be flooded. 2.1 The "pi" value for the case of simultaneous flooding of a wing and adjacent inboard compartment shall be obtained by using the formulae of paragraph 3, multiplied by the factor (1 - r). 2.2 The reduction factor "r" shall be determined by the following formulae- For J ≧ 0.2b/B- r = b/B(2.3 + 0.08/J+0.02) + 0.1, if b/B ≦ 0.2 r = (0.016/J+0.02 + b/B + 0.36), if b/B > 0.2 For J<0.2 b/B the reduction factor "r" shall be determined by linear interpolation between-r = 1, for J = 0; and r = as for the case where J ≧ 0.2b/B, for J = 0.2b/B, where- b = the mean transverse distance in metres measured at right angles to the centreline at the deepest subdivision load line between the shell and a plane through the outermost portion of and parallel to that part of the longitudinal bulkhead which extends between the longitudinal limits used in calculating the factor "pi". 3. To evaluate "pi" for compartments taken singly the formulae in paragraphs 1 and 2 shall be applied directly. 3.1 To evaluate the "pi" values attributable to groups of compartments the following applies- for compartments taken by pairs- pi = p12 - p1 - p2 pi = p23 - p2 - p3, etc. for compartments taken by groups of 3- pi = p123 - p12 - p23 + p2 pi = p234 - p23 - p34 + p3, etc. for compartments taken by groups of 4- pi = p1234 - p123 - p234 + p23 pi = p2345 - p234 - p345 + p34, etc. where-p12, p23, p34, etc.; p123, p234, p345, etc.; and p1234, p2345, p3456, etc., shall be calculated according to the formulae in paragraphs 1 and 2 for a single compartment whose nondimensional length "J" corresponds to that of a group consisting of the compartments indicated by the indices assigned to "p". 3.2 The factor "pi" for a group of 3 or more adjacent compartments equals zero if the nondimensional length of such a group minus the nondimensional length of the aftermost and foremost compartments in the group is greater than "J max". |
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