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Analysis of wave resonant effects in-between offshore vessels arranged side-by-side Ph.D. Thesis PDF

179 Pages·2016·6.52 MB·English
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Preview Analysis of wave resonant effects in-between offshore vessels arranged side-by-side Ph.D. Thesis

Analysis of wave resonant effects in-between offshore vessels arranged side-by-side Ph.D. Thesis Pasquale Dinoi Programa de doctorado en Tecnolog´ıas Mar´ıtimas Universidad Polit´ecnica de Madrid (UPM) Director: Jesu´s Go´mez-Gon˜i 29 de Julio de 2016 To my father, the person who left me early in life but would certainly be the proudest of my achievements. Tribunal nombrado por el Sr. Rector Magfco. de la Universidad Politécnica de Madrid, el día...............de.............................de 20.... Presidente: Vocal: Vocal: Vocal: Secretario: Suplente: Suplente: Realizado el acto de defensa y lectura de la Tesis el día..........de........................de 20 ... en la E.T.S.I. /Facultad.................................................... Calificación .................................................. EL PRESIDENTE LOS VOCALES EL SECRETARIO Contents Contents 9 Acknowledgments 11 Abstract 13 Resumen 15 1 Introduction 17 1.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.2 Side-by-Side operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.3 Gap flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.4 Experimental analysis of side-by-side hydrodynamics . . . . . . . . . . . . 29 2 Objectives 39 3 Methodology 41 4 Case studies 43 4.1 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 4.2 Configurations studied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 5 Theoretical background and numerical approaches 49 5.1 Frequency Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 5.2 Time Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 5.3 Numerical model with tank walls application . . . . . . . . . . . . . . . . . 61 5.4 Damping Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 7 8 CONTENTS 6 Experimental setup 67 6.1 Model Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 6.2 Wave Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 6.3 Laser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 6.4 Data acquisition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 6.5 Geosim Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 6.6 Barge Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 7 Seakeeping problem 91 7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 7.2 Motion RAOs of a single body . . . . . . . . . . . . . . . . . . . . . . . . . 91 8 Study of side-by-side gap flow 95 8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 8.2 Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 8.3 Numerical setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 8.4 Results: Tank walls influence . . . . . . . . . . . . . . . . . . . . . . . . . 103 8.5 Results: Gap value influence . . . . . . . . . . . . . . . . . . . . . . . . . . 111 8.6 Results: Draft value influence . . . . . . . . . . . . . . . . . . . . . . . . . 123 8.7 Gap resonant effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 9 Damping zone: Frequency and Time Domain 131 9.1 AQWA and TDRPM models with damping lid . . . . . . . . . . . . . . . . 131 9.2 Sensitivity analysis with damping lid in TDRPM . . . . . . . . . . . . . . 143 10 Conclusions 149 10.1 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 10.2 Future work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 Thesis publications 155 Refereed papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 Conference papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 Others publications 157 Appendices 159 CONTENTS 9 A Test matrices 161 B Calibration curves of the measurement devices 167 Bibliography 179

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I am very grateful to Patricia Alcanda-Sesmero for all the bureaucratic .. finite element method capable of solving multi-body seakeeping problems on
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