## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9American Society of Mechanical Engineers, 1990 - Arctic regions |

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Page 409

THEORETICAL AND EXPERIMENTAL STUDY OF BEAM FUNCTIONS FROM

ROTATING HYDROPHONE

beam pattern of a linear

...

THEORETICAL AND EXPERIMENTAL STUDY OF BEAM FUNCTIONS FROM

ROTATING HYDROPHONE

**ARRAYS**A . K ... ABSTRACT It is well known that thebeam pattern of a linear

**array**is dependent on the configuration of the**array**and...

Page 410

This paper describes the development of the rotating

work given in the references [ 8 , 9 ] . Reviews of the basic rotating

three dimensional analysis of its beam pattern are given . It will be shown in the ...

This paper describes the development of the rotating

**array**based on the originalwork given in the references [ 8 , 9 ] . Reviews of the basic rotating

**array**and athree dimensional analysis of its beam pattern are given . It will be shown in the ...

Page 411

The output functions of the 2 - element

cos ( wt + $ , - 2rrcose , ) ( 10 ) positions for correction phase calculation is

therefore not necessary . The

...

The output functions of the 2 - element

**array**including steering are given by : f =cos ( wt + $ , - 2rrcose , ) ( 10 ) positions for correction phase calculation is

therefore not necessary . The

**array**geometry in Figure 5 has cylindrical symmetry...

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### Contents

Identification of NonLinear Effects in Predicting the Motion Response of Mobile Platforms | 337 |

RISERSMOORINGSCABLES | 345 |

HYDRODYNAMIC FORCES | 347 |

Copyright | |

13 other sections not shown

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### Common terms and phrases

alternative amplitude analysis applied approach array axial barge bending brace buoyancy cable calculated coefficient combination compared configuration considered corresponding curvature curve damage damping defined deflection determined developed direction displacement distribution drag dynamic effects elements Engineering environmental equation estimated extreme factor fatigue Figure flexible riser flow force frequency function given height important increase indicate installation length linear load marine mass matrix maximum mean measured method mode mooring motion natural nonlinear normal obtained offshore operation parameters performed period phase pile platform position predicted present problem production relative represent respectively response riser rotating selection shown shows simulation soil solution static stiffness storage strain stress structure surface Table tension tests values vertical vessel water depth wave wind