ANALYSIS FOR THE PITCH and Heave Model WISE-8

ANALYSIS FOR THE PITCH and Heave Model WISE-8 Movement of the ship pitching and heaving analyzed through numerical calculation program to analyze the probability of slamming at speeds of 20 and 35 knots. The results of the calculation (RAO) vessel motion (pitch and heave) under conditions seastat-3 are presented in the form of curves and tables. The movement is due to the excitation of waves described above as follows. • Pitch Motion: Maximum single significant amplitude motion that occurs in the condition of wave direction of 180 ° (head seas) are 2.20 ° and 2.54 ° at 20 knots boat speed and 35 knots. • Heave Motion: Maximum single significant amplitude motion that occurs in the condition of wave direction of 180 ° (head seas) is 0.15m at a speed of 20 knots and a 0.16m boat at speeds of 35 knots. Wise speed 20 knots Item Mo Rms Sign.Amplitude Heave motion 0.006 m^2 0.074 m 0.149 m Pitch motion 1.21 deg^2 1.1 deg 2.2 deg Heave velocity 0.17 m^2/s^2 0.412 m/s 0.825 m/s Pitch velocity 0.01305 (rad/s)^2 0.1143 rad/s 0.2285 rad/s Heave acceleration 6.613 m^2/s^4 2.572 m/s^2 5.143 m/s^2 Pitch acceleration 0.5685 (rad/s/s)^2 0.754 rad/s/s 1.5079 rad/s/s) Wise speed 35 knots Item Mo Rms Sign.Amplitude Heave motion 0.006 m^2 0.08 m 0.16 m Pitch motion 1.62 deg^2 1.27 deg 2.54 deg Heave velocity 0.116 m^2/s^2 0.341 m/s 0.682 m/s Pitch velocity 0.01034 (rad/s)^2 0.1017 rad/s 0.2034 rad/s Heave acceleration 2.837 m^2/s^4 1.684 m/s^2 3.369 m/s^2 Pitch acceleration 0.3043 (rad/s/s)^2 0.5516 rad/s/s 1.1032 rad/s/s)

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