Research Article

An Analytical Method for Jack-Up Riser’s Fatigue Life Estimation

Table 2

The data of the wave force spectrum calculation ( m).

Sequence numberWave frequencyWavenumberWave force spectrum under finite water depthWave force spectrum under infinite water depth

10.050.00160.02523.93280.00000.0000
20.100.00320.09583.74370.00000.0000
30.150.00500.21363.42590.00000.0000
40.200.00690.35763.03200.00000.0000
50.250.00890.50612.61771.23 × 10111.01 × 1011
60.300.01130.65782.18113.48 × 10123.11 × 1012
70.350.01410.78761.78861.04 × 10139.87 × 1012
80.400.01740.88401.47531.34 × 10131.32 × 1013
90.450.02130.94511.25521.22 × 10131.21 × 1013
100.500.02580.97731.12209.49 × 10129.46 × 1012
110.550.03100.99191.05106.95 × 10126.95 × 1012
120.600.03680.99751.01884.98 × 10124.98 × 1012
130.650.04310.99931.00623.57 × 10123.57 × 1012
140.700.05000.99981.00182.57 × 10122.57 × 1012
150.750.05741.00001.00051.88 × 10121.88 × 1012
160.800.06531.00001.00011.39 × 10121.39 × 1012
170.850.07371.00001.00001.05 × 10121.05 × 1012
180.900.08271.00001.00007.96 × 10117.96 × 1011
190.950.09211.00001.00006.13 × 10116.13 × 1011
201.000.10201.00001.00004.77 × 10114.77 × 1011
211.050.11251.00001.00003.76 × 10113.76 × 1011
221.100.12351.00001.00002.99 × 10112.99 × 1011
231.150.13491.00001.00002.41 × 10112.41 × 1011
241.200.14691.00001.00001.95 × 10111.95 × 1011
251.250.15941.00001.00001.59 × 10111.59 × 1011
261.300.17241.00001.00001.31 × 10111.31 × 1011
271.350.18601.00001.00001.09 × 10111.09 × 1011
281.400.20001.00001.00009.09 × 10109.08 × 1010
291.450.21451.00001.00007.63 × 10107.63 × 1010
301.500.22961.00001.00006.45 × 10106.45 × 1010
311.550.24521.00001.00005.47 × 10105.48 × 1010
321.600.26121.00001.00004.67 × 10104.68 × 1010