Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 10American Society of Mechanical Engineers, 1991 - Arctic regions |
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Page 683
... POSITION AN HEADING Fig . 4 Block diagram of the DPS elements . and the position reference data , resulting in an overall tunning of the controller's gains . The additional forces are calculated as follows : Fy Mz Kp2e2 + Ki2 √ e̟dt + ...
... POSITION AN HEADING Fig . 4 Block diagram of the DPS elements . and the position reference data , resulting in an overall tunning of the controller's gains . The additional forces are calculated as follows : Fy Mz Kp2e2 + Ki2 √ e̟dt + ...
Page 689
... position of fairleaders . Therefore , it is clear that if the fairleader position goes down , the overturning moment increases due to large overturning arm . The total righting arm is obtained choosing the equilibrium position ( H ,, a ) ...
... position of fairleaders . Therefore , it is clear that if the fairleader position goes down , the overturning moment increases due to large overturning arm . The total righting arm is obtained choosing the equilibrium position ( H ,, a ) ...
Page 691
... position of fairleader depends on many operational and design parameters . However , to increase the stability , the fairleader height must be the largest one because , as explained before , the reaction force acts on fairleader position ...
... position of fairleader depends on many operational and design parameters . However , to increase the stability , the fairleader height must be the largest one because , as explained before , the reaction force acts on fairleader position ...
Contents
CASE HISTORIES OFFSHORE STRUCTURES | 331 |
OFFSHORE TECHNOLOGY PART | 337 |
OFFSHORE STRUCTURE CONCEPTS | 361 |
Copyright | |
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acceleration accelerometers added mass amplitude axial beam behaviour bending stiffness cable calculated Campos Basin catenary coefficient compliant tower components curvature curves cylinder damping ratio deck deformation developed diameter displacement drag drag coefficient dynamic analysis dynamic response effect Ekofisk elastic Engineering equation finite element finite element method flexible pipe fluid force free-fall lifeboat frequency domain hydrodynamic hydrodynamic damping impact in-span installation jack jacket joint launch length lift force linear load Mathieu Mathieu equation measured Mechanics meters method mode mode shape motion natural frequency nodal nodes nonlinear obtained Offshore Structures OMAE operation oscillation parameters phase pile platform pressure rotation seabed semi-rigid shear shown in Figure skin friction soil solution SPUS static analysis stiffness matrix submarine subsea support point tension tether torque transverse values vector velocity vertical vessel vibration Volume I-B water depth