Proceedings of the 21st International Towing Tank Conference, ITTC'96, Volume 2, September 15-21, 1996, Trondheim, Norway (summary)

ITTC

P1996-12

1 9 9 6 J Volume 2

INTERNATIONAL

TOWING TANK

CONFERENCE

Proceedings

Volume II

Trondheim, Norway

September 1 5 - 2 1 , 1996

INTNU

The Norwegian University

L

niTTCK

1996 J

21st

INTERNATIONAL

TOWING TANK

CONFERENCE

Organizing Committee

Mr. Arnold K. Hansen

Norwegian Marine Technology Research Institute

Dr. Erhng Huse

Norwegian Marine Technology Research Institute

Dr. Odd Faltinsen

The Norwegian University of Science and Technology

Advanced Production and Loading A/S

Det norske Veritas Classifications A/S

Kvaerner Masa-Yards Inc.

Royal Norwegian Ministry of Foreign Affairs

Research Council of Norway

Dr. Erling Huse

Norwegian Marine Technology Research Institute

Sponsors

MARINTEK

SINTEF

Editor

I

1

PREFACE

With the publication of Volume n of the Proceedings the work of the 21st ITTC Secretariat has come to an end. On this occasion the Organizing Committee would like to thank the delegates to the Conference and their accompanying persons for their enthusiastic participation in the technical sessions and the social program.

The 21st n r c deviated somewhat from previous Conferences in the sense that it took place at three different locations, in Bergen, on board the Coastal Express, and in Trondheim. When planning the arrangements we felt a litde bit uneasy that checking in and out of two different hotels and the ship, all during one week, might end up as a stressing experience to the participants. We appreciate very much the patience shown by everybody in this respect. On the other hand we take pride in having been able to show you the west coast of Norway in this manner (and weather !), and hope that everyone enjoyed it.

On this occasion we also extend our sincere thanks to the sponsors. They are listed on the title page of this volume. Last, but not least, we would like to express our appreciation to Ms. Inger Gudmundscn of MARINTEK for her excellent assistance in preparing the Technical Program and the two volumes of the Proceedings, and to Ms. Astrid Bye and Ms. Mari Saeterbakk of SEVU for their very professional work in managing the Social Program and general secretariat functions prior to, and during the Conference.

At MARINTEK and NTNU we look forward to continued association with, and" activities for the ITTC in future years.

Table of Contents

Proceedings of the 21^^ ITTC

Volume II

Preface i Contents I Program of 21st rTTC 1

Conference Photograph 2 The Seakeeping Committee 7

I Discussions 7 II Committee Replies 19

The Cavitation Committee 23 I Discussions 23 II Committee Replies 27

The Propulsor Committee 31 I Discussions ] [ 31

I I Committee Replies 34

The Waterjets Group 37 I Discussions ! ! ! ! ! ! ! ! ! ! ! ! ! ! 37

I I Committee Replies 41

ni Errata . . . . . .

The Performance in Ice-Covered Waters Committee 4 5

Discussions 4 5

n Committee Replies . . . 48

The Ocean Engineering Committee 51

I Discussions ' . 5 1

II Committee Replies . . . [ [ [ . . . [ , , , 5 5

The Quality Control Group 5 9 Discussions 5 9 II Committee Replies 72

n

The Symbols and Terminology Group 75 I Concerning the Electronic Distribution of ITTC Documents 75

The Manoeuvrability Committee 77

I Discussions 77

n Committee Replies 91

The Powering Performance Committee 95

I Discussions 95

n Committee Replies 101

The Resistance and Flow Committee 107

I Discussions 107

n Committee Replies 116

The High-Speed Marine Vehicles Committee 117

I Discussions 117 n Committee Replies 119 Workshops Stability 121 I Introduction 121 n Contributions 132

Model Testing of Deep Sea Offshore Structures 161

I Introduction 161

n Contributions 162

Unconventional Propulsion 175 1 Introduction 175

n Contributions 176

Response Based Design Loads, Impact on Model Testing 199

I Introduction 199

n Connibutions 202

Appendices

1. Structure and Tasks of 22nd ITTC 215 1. Stmcture of the Technical Conunittccs 215

2. Terms of Reference for the General and Specialist Technical Committees 215

3. Mechanism for identifying New Specialist Technical Committees 216 4. Tasks of Technical Committees and Groups of 22nd ITTC 216

2. Committees of the 22nd ITTC 221

3. Member Organizations 225