A Basic Study of Stop Hole to Prevent Brittle High-Speed Crack Propagation : 2nd Report, Discussion of Crack Restart Condition Using the Moving Finite Element Analyses

This paper presents the results of an investigation on the suitability of using hull panels with alternating fixed and floating frames for a 30–40 knot aluminum catamaran ferry. A prototype 4.6 m × 1.8 m bottom hull panel with alternating frames is analyzed numerically and physically tested. The corresponding finite-element analyses and test results are in good agreement. The results show that the floating frame hull panel design is a feasible structure for an aluminum catamaran. The floating frame structure was then used for a 33-knot, 250-passenger aluminum catamaran ferry designed to meet the ABS High Speed Craft rules. A midship section of the catamaran hull was analyzed using the finite-element method. Catamaran weight estimates, heave and pitch motions, and powering estimates are also provided. The results show that the alternating floating frame structure was within the ABS rules stress allowables.

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Local stress evaluation of rapid crack propagation in finite element analyses

International Journal of Solids and Structures ◽

10.1016/j.ijsolstr.2018.04.014 ◽

2018 ◽

Vol 144-145 ◽

pp. 66-77 ◽

Cited By ~ 7

Author(s):

Fuminori Yanagimoto ◽

Kazuki Shibanuma ◽

Yo Nishioka ◽

Yuya Shirai ◽

Katsuyuki Suzuki ◽

...

Keyword(s):

Finite Element ◽

Crack Propagation ◽

Local Stress ◽

Finite Element Analyses ◽

Stress Evaluation ◽

Rapid Crack Propagation

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Finite element analyses of wave propagations due to a high-speed train across bridges

International Journal for Numerical Methods in Engineering ◽

10.1002/nme.473 ◽

2002 ◽

Vol 54 (9) ◽

pp. 1391-1408 ◽

Cited By ~ 28

Author(s):

S. H. Ju

Keyword(s):

Finite Element ◽

High Speed ◽

Finite Element Analyses ◽

High Speed Train

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Research on Electromagnetic Catapult-Oriented Permanent Magnet Linear Synchronous Motor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.509 ◽

2012 ◽

Vol 490-495 ◽

pp. 509-513

Author(s):

Ji Zhu Liu ◽

Ming Chong Sun ◽

Tao Chen ◽

Ming Qiang Pan

Keyword(s):

Finite Element ◽

Theoretical Analysis ◽

High Speed ◽

High Efficiency ◽

Thrust Force ◽

Structural Parameters ◽

Finite Element Analyses ◽

Aircraft Carrier ◽

Technical Requirements ◽

Designing Method

Compared with steam catapult device, electromagnetic catapult device has high catapult energy, low system weight, high efficiency etc., so electromagnetic catapult makes an important developing direction for the aircraft carrier catapult. According to the technical requirements of electromagnetic catapult, the paper analyses the factors that affect the efficiency of electromagnetic catapult, proposes the method of using slotting PMLSM in low-speed segment and non-slotting PMLSM in high-speed segment to drive, which improves the systematic efficiency of the catapult process. The paper designs a structure of PMLSM assembled by stator modules. Also researches on PMLSM using the designing method of finite element, analyses the structural parameters the influences have on the thrust force of slotting and non-slotting motor, presents the optimal motor structural parameters, and at last proves the correctness of the theoretical analysis through experiment.

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