Question: 7. Using the power dissipated without the PTO at the resonance frequency, determine an equivalent linear damping coefficient R for the massless piston, using

7. Using the power dissipated without the PTO at the resonance frequency, determine an equivalent linear damping coefficient R for the massless piston, using the relation = P=Rl (5) where |o w|so is the peak velocity of the piston, i.e. the interior free surface. Assuming this same linearised dissipation coefficient applies to other frequencies, plot the theoretical amplification |0/A| against wave period for the range 0.8 s < T < 1.3 s, using the radiation damping, added mass, and exciting force from (2)-(4) and the hydrostatic stiffness pg2b. Show the experimental amplification against wave period on the same plot. [7 marks]

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