| Abstract: | Presented is a systematic approach, for analysing the vertical motion, tendon force and foundation uplift of a tension-leg platform (TLP) when the subsea soil is excited by vertical seismic waves. The complex problem of multiple interactions among the soil, foundation, fluid and platform can be mathematically modelled using the substructure technique. Having obtained the frequency dependent impedance function for each substructure, the total system is then solved in the frequency domain. A specific TLP is analysed to show the application of the procedures developed and the importance of response to vertical seismic excitation. |
