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http://hdl.handle.net/2074/753
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| Title: | Active control of non-linearly coupled TLP response under wind and wave environments |
| Authors: | Ahmad, S K
Ahmad, S |
| Keywords: | active control
wave force
wind
control
Simulation techniques
fluctuating wind characteristics
Riccati equation
hostile ocean environments |
| Issue Date: | 1999 |
| Citation: | Computers and Structures, 72(6), 735-747 |
| 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 desi... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/753 |
| Appears in Collections: | Applied Mechanics
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| ahmadact1999.pdf | | 277Kb | Adobe PDF | View/Open |
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