Abstract
Abstract In this paper, two analysis models for tension leg platform (TLP) are proposed based on different simulation methods of the tendons for studying the TLP motion responses in waves. In the uncoupled analysis model, the tendon is simplified as a spring, and the restoring forces matrix is derived with the consideration of the influence of the coupled effect of horizontal offset and vertical setdown of the platform. In the coupled model, the axial and transverse vibration’s coupled effect has been considered for the establishment of the vibration equations for the tendons, and the finite difference method is used to solve the vibration equations. The time-domain coupled motion model of the platform and the mooring system is established based on the interaction forces between the tendons and the platform. The coupled and uncoupled TLP models are compared and analysed to determine their applicability. Compared with the uncoupled TLP model, the coupled TLP model has greater accuracy and a wider application range, and the effects of second-order wave force on the platform responses, horizontal offset, and vertical subsidence are analysed.
Highlights
The tension leg platform (TLP) models can be calculated using the frequency domain method or the time domain method
Chandrasekaran [6] calculated the dynamic responses of the triangular TLP in the random waves based on the uncoupled model in which the influence of diffraction effect and second-order wave force was ignored
In the uncoupled TLP model, the coupled effects of horizontal offset and vertical setdown of the platform are considered in the restoring force coefficient matrix
Summary
The tension leg platform (TLP) models can be calculated using the frequency domain method or the time domain method. In the uncoupled TLP model, the coupled effects of horizontal offset and vertical setdown of the platform are considered in the restoring force coefficient matrix. The model simplifies the tether into a linear spring structure and is used to analyse the motion responses of TLP when considering the coupled effects of horizontal offset and vertical setdown of the platform. In order to study the TLP time-domain motion responses, the coupled condition of the tether vibration and platform motion is considered, and the coupled TLP model is used to conduct numerical prediction research. Where F6Wave is the moment of a wave to the platform in the z-axis; FL6 is the moment of the tether to the platform in the z-axis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
