Page 16 - Practical Ship Design
P. 16
...
Xlll
3.2 The volume equations ..............................
3.3
3.4
3.5
Chapter 4 . Weight-Based Designs
4.1 Introduction ................................... 81
4.1.1 Demarcation of the weight groups ................... 81
4.2 Structural weight approximations ........................ 82
4.2.1 Lloyd’s equipment number method ................... 82
4.2.2 Invoiced or net weight .......................... 83
4.2.3 The effect of the block coefficient on steel-weight ........... 83
4.2.4 Plotting the steel-weight against E ................... 84
4.2.5 Scrap and invoiced steel-weight ..................... 87
4.2.6 Other approximate formulae for steel-weight .............. 87
4.2.7 A rational base for approximate structural weight estimation ...... 89
4.3 Detailed structural weight calculations -all ship types ............. 91
4.3.1 Use of the midship section weight per unit of length for merchant
ship weight calculations ......................... 91
4.3.2 Items not in the weight per unit length .................. 98
4.3.3 Detailed structural weight calculations - warships .......... 99
4.4 Outfit weight calculations ............................ 99
4.4.1 Approximate methods - all ship types ................. 99
4.4.2 More detailed outfit weight estimation - merchant ships ....... 103
4.4.3 Detailedoutfitweightcalculations-merchant ships ......... 103
4.4.4 Detailed outfit weight calculations - warships ............. 106
4.5 Machinery weight ............................... 107
4.5.1 Machinery type ............................ 107
