## 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 178

V ( Zref ) ) , and for the wind response Zw , both are assumed equal to Te , where

Te is the surge slow -

the formula for the average rate of upcrossings of the mean value level for a ...

V ( Zref ) ) , and for the wind response Zw , both are assumed equal to Te , where

Te is the surge slow -

**drift**period . It is realized that equation ( 26 ) is based onthe formula for the average rate of upcrossings of the mean value level for a ...

Page 179

8 - - - cos distribution ( cos ( thola ) ) ' s ) The mean

which also re quires only the first order potential for its evaluation , is less robust

and , in the quite important period range from 9 to 13 seconds , up to a 40 ...

8 - - - cos distribution ( cos ( thola ) ) ' s ) The mean

**drift**force on the other hand ,which also re quires only the first order potential for its evaluation , is less robust

and , in the quite important period range from 9 to 13 seconds , up to a 40 ...

Page 182

For the present environmental conditions , the mean offset due to wind is around

3 - 4 times the size of the mean

dynamics due to wind is comparable in magnitude to the low frequency wave ...

For the present environmental conditions , the mean offset due to wind is around

3 - 4 times the size of the mean

**drift**due to waves . Furthermore , the slow**drift**dynamics due to wind is comparable in magnitude to the low frequency wave ...

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