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Wave Resistance - Coggle Diagram
Wave Resistance
Wave generators
Bow
Stern
approx 1 shiplength
Reinforced wave
Stern wave crest
at the Bow wave crest
Interferência construtiva
Transverse waves only
Wave making length
\( l=0.557V^2 \)
V - wave velocity em
[kt]
(same as ship)
l - wavelength
[ft]
Deep water
Distance BTW
Bow crest and Stern Crest
Create wave
spends energy
Proportional to
Breadth of wave
Square of the wave`s height
\( \propto B \times H^2 \)
Power of Train of Waves = Energy per wave X Rate of creation
Diminished wave
Stern wave crest
at the Bow wave trough
Wave reinforcement or cancelation depends on relation \( l/L \)
\( \frac{l} {L}\approx\frac{V^2} {L} \)
\( \frac{V} {\sqrt{L}} \)
Speed-length ratio
V -
[kt]
L -
[ft]
Com esse comprimento todo, vai Raizga-La
Reinforced and increase in resistance
\(\dfrac{l}{L} = L \) or fraction
Resistance x Speed-length ratio (Havelock)
Decrease in resistance from speed-length ratio of 2
water does not have time to disturb
not disturbed as at lower speeds
Relation BTW \(l\) and \(L\)
Vary with hull shape
\(l\) usually slightly GREATER than \(L\)
