## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |

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Page 60

These stresses arise as the flapper perimeter comes to a sudden halt on

contact with the seating ring , whereas the inertia of the central part carries on

taking it forward . Flappers designed without making allowance for the inertial

force ...

These stresses arise as the flapper perimeter comes to a sudden halt on

**impact**/contact with the seating ring , whereas the inertia of the central part carries on

taking it forward . Flappers designed without making allowance for the inertial

force ...

Page 379

5 70 10 20 30 40 50 50 60 Stress ( MPa ) Figure 6 Probability density of

stress . Current velocity is 1 . 3m / s 1 . 5 Max

5 70 10 20 30 40 50 50 60 Stress ( MPa ) Figure 6 Probability density of

**impact**stress . Current velocity is 1 . 3m / s 1 . 5 Max

**Impact**Speed ( m / s ] Figure 8 Max**impact**speed with depth . Current velocity is 1 . 5 m / s . The extension and ...Page 380

The two distinct peaks occur as the same locations as for the maximum

speed . However , the third peak for the

for the accumulated damage . The stress probability density is shown in Figure

10 .

The two distinct peaks occur as the same locations as for the maximum

**impact**speed . However , the third peak for the

**impact**speed is much less pronouncedfor the accumulated damage . The stress probability density is shown in Figure

10 .

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