Download Analysis and Design of Marine Structures: including CD-ROM by Carlos Guedes Soares, P.K. Das PDF

By Carlos Guedes Soares, P.K. Das

ISBN-10: 0415549345

ISBN-13: 9780415549349

'Analysis and layout of Marine constructions' explores contemporary advancements in equipment and modelling systems for structural evaluate of marine structures:

- equipment and instruments for constructing lots and cargo effects;

- tools and instruments for power assessment;

- fabrics and fabrication of structures;

- equipment and instruments for structural layout and optimisation;

- Structural reliability, protection and setting safety.

The publication is a helpful reference resource for lecturers, engineers and execs concerned about marine constructions and layout of send and offshore structures.

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Extra resources for Analysis and Design of Marine Structures: including CD-ROM

Sample text

2 LS-DYNA approach adopted by PRI The LS-DYNA software is used. This is an explicit finite element code solving the mechanics equations (here corresponding more precisely to the RANSE with Reynolds stresses neglected). The fluid domain is modelled using a multi-materials Eulerian formulation. For the advection of the variables at the integration points, a Van Leer scheme (second order precision) is used and a Half Index Shift (HIS) method for the nodal variables. Each material is characterized by a volume fraction inside each element.

Figure 19–20. Kinematics capturing with SPH—max peak (upper) and min peak (lower). 3 Also in this case PRI and BV calculations are those which were run for a longer time, showing again a good stability, considering also the high nonlinearities and surface deformations involved in this case. For what regards Sensor 3, different considerations have to be made. All methods are capable of capturing the sloshing impact on the tank top, however considering pressures, ranging the experimental value between 700 and 1000 Pa apart two initial higher peaks, all numerical methods present a rather variable behavior, with BV presenting oscillating values with higher peaks up to 1500 Pa and lower values with almost no impact, PRI and SPH with a similar trend and even higher peaks in some cases (2000 and 2500 Pa, respectively) and UoS with less oscillating values with a decreasing tendency.

Water levels considered. 32 Table 2. 9T0 - Sensor 6 Test Cases description. 0 p [Pa] 750 500 250 Case A - T = T0 - Sensor 1 0 2'500 0 5 10 15 20 25 30 35 40 t [s] 2'000 Figure 3. 9 T0 —Pressure at Sensor 6. p [Pa] 1'500 1'000 Case B - T = T0 - Sensors 3 and 6 500 2'500 0 0 5 10 15 20 25 30 2'000 t [s] Sensor 6 Experimental Sensor 3 Figure 2. Sensor 1. p [Pa] 1'500 Test Case 1—Level A—T = T0 —Pressure at 1'000 500 For both water levels, experiments carried out in correspondence to the resonance period have been considered (case 1 and 3 for level A and B respectively), to have large free surface deformation and analyse codes’ capability to capture it.

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