Non Linear Analysis of Ship Motions and Loads in Large Amplitude Waves

2010 ◽  
Author(s):  
G Mortola ◽  
◽  
A Incecik ◽  
O Turan ◽  
S E Hirdaris ◽  
...  
2021 ◽  
Vol 153 (A2) ◽  
Author(s):  
G Mortola ◽  
A Incecik ◽  
O Turan ◽  
S.E. Hirdaris

A non linear time domain formulation for ship motions and wave loads is presented and applied to the S175 containership. The paper describes the mathematical formulations and assumptions, with particular attention to the calculation of the hydrodynamic force in the time domain. In this formulation all the forces involved are non linear and time dependent. Hydrodynamic forces are calculated in the frequency domain and related to the time domain solution for each time step. Restoring and exciting forces are evaluated directly in time domain in a way of the hull wetted surface. The results are compared with linear strip theory and linear three dimensional Green function frequency domain seakeeping methodologies with the intent of validation. The comparison shows a satisfactory agreement in the range of small amplitude motions. A first approach to large amplitude motion analysis displays the importance of incorporating the non linear behaviour of motions and loads in the solution of the seakeeping problem.


2002 ◽  
Vol 2002 (191) ◽  
pp. 97-103 ◽  
Author(s):  
Takako Kuroda ◽  
Yoshiho Ikeda ◽  
Toru Katayama ◽  
Ritsuo Shigehiro

2002 ◽  
Vol 2002 (192) ◽  
pp. 237-246 ◽  
Author(s):  
Takako Kuroda ◽  
Tetsuro Ikebuchi ◽  
Yoshiho Ikeda

Author(s):  
Oldřich Sucharda ◽  
David Mikolášek ◽  
Jiří Brožovský

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.


Author(s):  
Ben Hunter ◽  
Andrew Greenhalgh ◽  
Bettina Karsten ◽  
Mark Burnley ◽  
Daniel Muniz-Pumares

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