UFC 4-159-03
3 October 2005
CHAPTER 4
STATIC ENVIRONMENTAL FORCES AND MOMENTS ON VESSELS
4-1
SCOPE. In this chapter design methods are presented for calculating
static forces and moments on single and multiple moored vessels. Examples show
calculation methods.
4-2
ENGINEERING PROPERTIES OF WATER AND AIR. The effects of
water and air at the surface of the earth are of primary interest in this chapter. The
engineering properties of both are given in Table 4-1.
Table 4-1. Engineering Properties of Air and Water
Standard Salt Water at Sea Level at 15oC (59oF)
PROPERTY
SI SYSTEM
ENGLISH SYSTEM
1026 kg/m3
1.9905 slug/ft3
Mass density, ρw
10060 newton/m3
64.043 lbf/ft3
Weight density, γw
0.9904 m3/LT
34.977 ft3/LT
Volume per long ton (LT)
1.191E-6 m2/sec
1.2817E-5 ft2/sec
Kinematic viscosity, ν
Standard Fresh Water at Sea Level at 15oC (59oF)
PROPERTY
SI SYSTEM
ENGLISH OR
INCH-POUND
SYSTEM
999.0 kg/m3
1.9384 slug/ft3
Mass density, ρw
9797 newton/m3
62.366 lbf/ft3
Weight density, γw
1.0171 m3/LT
35.917 ft3/LT
Volume per long ton (LT)
1.001 m3/ton
35.3497 ft3/ton
Volume per metric ton
(ton or 1000 kg or 1 Mg)
1.141E-6 m2/sec
1.2285E-5 ft2/sec
Kinematic viscosity, ν
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