scholarly journals Ship's Rolling Motion Analysis from the Nonlinear Dynamics Point of View-V : Fractal Dimension of Rolling Motion for Fishing Vessel in Wind Waves

1992 ◽  
Vol 86 (0) ◽  
pp. 313-323
Author(s):  
Rihei KAWASHIMA
Keyword(s):  
Nonlinear Dynamics ◽  
Fractal Dimension ◽  
Motion Analysis ◽  
Wind Waves ◽  
Point Of View ◽  
Rolling Motion ◽  
Fishing Vessel

Roughness and fractality of fracture surfaces as indicators of mechanical quantities of porous solids

Open Physics ◽  
2011 ◽  
Vol 9 (6) ◽  
Author(s):  
Tomáš Ficker ◽  
Dalibor Martišek
Keyword(s):  
Mechanical Properties ◽  
Fractal Dimension ◽  
Fractal Dimensions ◽  
Point Of View ◽  
Porous Solids ◽  
Surface Parameter ◽  
Cement Pastes ◽  
Fracture Surfaces ◽  
Profile Parameter ◽  
3D Profile

AbstractThe 3D profile surface parameter H q and fractal dimension D were tested as indicators of mechanical properties inferred from fracture surfaces of porous solids. High porous hydrated cement pastes were used as prototypes of porous materials. Both the profile parameter H q and the fractal dimension D showed capability to assess compressive strength from the fracture surfaces of hydrated pastes. From a practical point of view the 3D profile parameter H q seems to be more convenient as an indicator of mechanical properties, as its values suffer much less from statistical scatter than those of fractal dimensions.

scholarly journals Motion analysis for the evaluation of muscle overactivity: A point of view

2019 ◽  
Vol 62 (6) ◽  
pp. 442-452 ◽  
Author(s):  
N. Roche ◽  
C. Bonnyaud ◽  
V. Reynaud ◽  
D. Bensmail ◽  
D. Pradon ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Point Of View

scholarly journals Analysis of rough voice from a nonlinear dynamics point of view

1993 ◽  
Vol 94 (3) ◽  
pp. 1762-1762
Author(s):  
David A. Berry ◽  
Ingo R. Titze ◽  
Hanspeter Herzel
Keyword(s):  
Nonlinear Dynamics ◽  
Point Of View

The Effect of Measured Whipping and Springing on LNG Vessels

2013 ◽  
Author(s):  
Gaute Storhaug ◽  
Narve Oma ◽  
Bjarne Blomberg ◽  
Kazuhiro Hirota
Keyword(s):  
Fatigue Damage ◽  
North Atlantic ◽  
Wind Waves ◽  
Point Of View ◽  
Strain Sensors ◽  
General Level ◽  
Structural Members ◽  
The North ◽  
The Relationship ◽  
The North Pacific

Strain measurements of structural members onboard two LNG vessels have been collected for a period of 5 years. The vessels have been sailing in the world wide trade except for the North Pacific area. The time spent in the North Atlantic is about 40%, which is higher than for typical LNG vessels. The vessel speed has been relatively low in average and well below the service speed, still the effect of springing and whipping has been significant on the fatigue and extreme loading. Previously, results from the strain sensors have been presented versus the fatigue and extreme loading on a general level, independent on the environmental conditions. In this paper the focus is more towards how the vessel behaves in wind/waves with respect to springing and whipping in order to understand more of the relationship between accumulated fatigue damage, heading and loading condition. The vessels have been equipped with wave radars and wind sensors. The effect of whipping and springing on accumulated or part fatigue damage versus relative heading is demonstrated. The effect as a function of the wave height/wind speed is shown for selected headings. One of the objectives is to check if the wind sensor can be a useful alternative to the wave sensor to capture the physics. Some of the data is studied for ballast and cargo condition separately in order to see if these loading conditions can be merged, which is desirable from an assessment point of view.

scholarly journals Chaotic Saddles in a Generalized Lorenz Model of Magnetoconvection

2020 ◽  
Vol 30 (12) ◽  
pp. 2030034
Author(s):  
Francis F. Franco ◽  
Erico L. Rempel
Keyword(s):  
Nonlinear Dynamics ◽  
Fractal Dimension ◽  
Phase Space ◽  
Lyapunov Exponent ◽  
Chaotic Attractors ◽  
Maximum Lyapunov Exponent ◽  
Lorenz Model ◽  
Fractal Basin Boundaries ◽  
Chaotic Transients ◽  
Basin Boundaries

The nonlinear dynamics of a recently derived generalized Lorenz model [ Macek & Strumik, 2010 ] of magnetoconvection is studied. A bifurcation diagram is constructed as a function of the Rayleigh number where attractors and nonattracting chaotic sets coexist inside a periodic window. The nonattracting chaotic sets, also called chaotic saddles, are responsible for fractal basin boundaries with a fractal dimension near the dimension of the phase space, which causes the presence of very long chaotic transients. It is shown that the chaotic saddles can be used to infer properties of chaotic attractors outside the periodic window, such as their maximum Lyapunov exponent.

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