| Research Support Tool |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Context
Active control of non-linearly coupled TLP response under wind and wave environments
Title:
Active control of non-linearly coupled TLP response under wind and wave environments
Archive:
Eprints@IIT Delhi
Author(s):
Ahmad, S K
Ahmad, S
Ahmad, S
Date:
2005-08-13
Abstract:
This paper deals with an active control strategy to check the non-linearly coupled response of a tension leg platform (TLP), a deep water semi-submersible type compliant offshore structure moored by vertical taut- cables called tendons or tethers. The effects of potential non-linearities together with coupling of various degrees of
freedom are studied. Low-frequency viscous drift force has also been taken into account with first-order wave forces. Simulation techniques have been employed to incorporate the random sea and fiuctuating wind characteristics. Corrective control force is generated to alleviate the undesirable motion characteristics. The Riccati equation is used to determine the optimal control force. Response time histories and power spectra are generated
for long crested random sea along with drift and wind forces. These responses are compared with the same under control. The present study aims at an efficient method of determination of the control force magnitude to design a control strategy for serviceability and survival of tension leg platforms in hostile ocean environments.
freedom are studied. Low-frequency viscous drift force has also been taken into account with first-order wave forces. Simulation techniques have been employed to incorporate the random sea and fiuctuating wind characteristics. Corrective control force is generated to alleviate the undesirable motion characteristics. The Riccati equation is used to determine the optimal control force. Response time histories and power spectra are generated
for long crested random sea along with drift and wind forces. These responses are compared with the same under control. The present study aims at an efficient method of determination of the control force magnitude to design a control strategy for serviceability and survival of tension leg platforms in hostile ocean environments.
Index terms:
Discipline(s):
active control
Subject(s):
wave force; wind; control; Simulation techniques; fluctuating wind characteristics; Riccati equation; hostile ocean environments
Method/Approach:
Coverage:
Publisher:
Contributors:
Source:
Language:
en
Relation:
Type:
Article
Format:
284068 bytes
application/pdf
Copyright Information:
Browse Archive