INTERNATIONAL TOW
P2010-5
rc WORKSHOP ON SEAKEEPING
V&V for Nonlinear Seakeeping Analysis
-Delft University of Technology
Ship Hydromechanics laboratory
Library
Mekelweg 2 26282 CD Delft
Phone: +31 (0)15 2786873 E-mail: p.w.deheer®tudeift.nl
PROCEEDINGS
I T T C Workshop on Seakeeping
V&V for Nonlinear Seakeeping Analysis
-October 19-21, 2010
Seoul National University, Seoul, Korea
Technical Committee:
Beck, R. (Univ. o f Michigan, USA) Chen, X.B. (BV, France)
Choi, H.S. (Seoul National University, Korea)
Crossland, R (Chair of I T T C Seakeeping Committee, QinetiQ, U K ) Fathi, D . (MARINTEK, Norway)
Faltinsen, O.M. (Trondheim University, Norway) Francescutto, A . (University o f Trieste, Italy) Hayden, D. (NSWC-CD, USA)
Hermanski, G. (National Research Council, Canada) Huijsman, R.H.M. (Delfil University, the Netherlands) Kashiwagi, M . (Osaka University, Japan)
Keuning, J.A. (Delft University of Technology, the Netherlands) K j m , Y. (Workshop Host, Seoul National University, Korea) Kishev, R. (Bulgarian Ship Hydrodynamics Centre, Bulgaria) Matsumoto, K. (Universal Shipbuilding Corporation, Japan) Miao, Q.M. (China Ship Scientific Research Center, China) Purtell, R (ONR, USA)
Organization:
The ITTC Workshop on Seakeeping was organized by ITTC Seakeeping Committee and hosted by Professor Yonghwan K i m o f the Department o f Naval Architecture and Ocean Engineering in Seoul National University. The workshop was held at Seoul National University in Seoul, Korea, fi-om 19 to 21 October, 2010.
Sponsors:
The ITTC Workshop on Seakeeping was jointly sponsored by Office of Naval Research, Seoul National University, Daewoo Shipbuilding and Marine Engineering Co., Samsung Heavy Industries Co., LRET-funded Research Center at SNU, and Advanced Marine Engineering Center.
Preface
The hitemational Towing Tank Conference (ITTC) is a voluntary association o f worldwide organizations that have responsibility for the prediction o f hydrodynamic performance o f ships and marine installations based on the results o f physical and numerical modeling.
The seakeeping analysis o f ships is an essential element o f the design process. As ships are getting bigger and faster than ever, the motion response and structural loads in waves become more important to the designer and operator. One o f the aims of the ITTC is to develop standards and best practices for model testing and simulation that can be used to support seakeeping analysis. With the availability o f nonlinear time domain seakeeping analysis tools increasing, verification and validation ( V & V ) o f these prediction tools is becoming more important.
Thus, the need for a robust V & V procedure is required. The purpose o f this workshop is to provide the means to discuss, by way o f a comparative study, the approaches that are adopted in V & V activities o f non-linear ship motion simulation software. In preparation for the workshop, participants were provided with a dataset o f benchmark test cases from which their V & V activities o f their non-linear ship motion prediction methods can be understood.
The ship geometry and the specific test conditions to be used for the workshop were made available to the participants. The ftill set o f test data including free test results are made available for comparison and discussion at the workshop.
This workshop has been initiated by 26th ITTC Seakeeping Committee with a view to using the workshop to provide guidance on the development o f procedures for verification and validation activities o f linear and non-linear seakeeping codes.
Contents
1. Belenky, V., Bassler, C , Dipper, M., Campbell, B., VVeems, K . , and Spyrou, K .
Direct assessment methods for nonlinear ship response in severe seas 1
2. Bruzzone, D., Gironi, C , and Grasso, A.
Nonlinear effects on motions and loads using an iterative time-frequency
solver 17 3. Bulian, G . , Francescutto, A., and Fucile, F.
Occurrence o f resonant roll motion due to multi-frequency off-resonance
excitation: a preliminary numerical investigation 28 4. Cho, Y.R., Jeong, S.W., Sun, J.O., Jeong, S.G., Hong, S.W., and Sung, H . G .
Study on seakeeping analysis o f LNG FSRU in waves 43
5. Grigoropoulos, G . J . , Katsikis, C , and Chalklas, D.S.
Experimental verification o f the linear and non-linear versions o f a panel
code 56
6. Kim, M.S., Kim, B.W., Kawabe, H., and Ha, M.K.
Nonlinear effect on wave loads o f large ships in time domain 67
7. Kim, S.
CFD as a seakeeping tool for ship design 77
8. Kim, T.Y. and Kim, Y.
Multi-level approach o f parametric roll analysis 93 9. Kim, Y , K i m , K . H . , Kim, J . H . , K i m , T . Y , Seo, M.K., and K i m , Y
Time-domain analysis o f nonlinear motion responses and structural loads
10. L i u , S. and Papanikolaou, A .
Time-domain hybrid method for simulating large amplitude motions of ships
advancing in waves 140
11. Matusiak, J .
On the non-linearities o f ship's restoring and the Froude-Krylov wave
load part 151
12. McTaggart, K . A .
Verification and validation o f ShipMo3D ship motion predictions in the
time and fi-equency domains 160
13. Miyake, R., Matsumoto, T., Yamamoto, N., and Toyoda, K .
On the estimation o f whipping/springing response acting on a ultra large
containership 175
14. Ogawa, Y and Takagi, K .
A n assessment o f the effect o f hull girder vibration on the statistical
characteristics o f wave loads 186
15. Orihara, H .
Comparison o f CFD simulation with experimental data for a tanker model
advancing in waves 196
16. Qiu, W., Peng, H., and Hermanski, G .
Numerical prediction o f wave-induced motions and loads on a hydroelastic
model 205
17. Story, W.R., Xing, Z., Wu, W., and McCue, L .
Validation: a historical look and two suggested techniques 214
18. Walree, F. van and Carette, N.F.A.J.
Validation o f time domain seakeeping codes for a destroyer hull form
19. Wu, C.S., Zhou, D . C , Gao, L . , and Miao, Q . M .
CFD computation o f ship motions and added resistance for a high speed
trimaran in regular head waves 262
20. Wu, M.K., Hermundstad, O.A., and Zhu, S.
Comparative study o f springing and whipping effects in ultra large container
ships 270
