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Numerical Simulation of Ski-Jump Hydraulic Behavior
2020The hydraulic behavior of ski jumps is investigated numerically using the OpenFOAM digital library. A number of ski-jump cases has been simulated by following the RANS approach (Reynolds Averaged Navier-Stokes equations), using the k-ω SST closure model, and the VoF technique (Volume of Fluid) for the tracking of the free surface.
Agostino Lauria, Giancarlo Alfonsi
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Serious ski jumping injuries in Norway
The American Journal of Sports Medicine, 1985Injuries caused by ski jumping have been poorly inves tigated. Among approximately 2,200 licensed jumpers in Norway, there occurred at least 12 injuries with a permanent medical disability of ≧10%. The risk of being seriously injured is approximately 5%o in a 5 year period (1977 to 1981); it is higher in the age group 15 to 17 years.
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SIGGRAPH ASIA 2016 Posters, 2016
We introduce a virtual ski jump system as indoor, experience-based entertainment. The goal of this system is an exciting, enjoyable, safe experience for an inexperienced person. The key of the system is the physical stimuli from below for realistic experience compared to other conventional systems.
Naoto Yoshida +3 more
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We introduce a virtual ski jump system as indoor, experience-based entertainment. The goal of this system is an exciting, enjoyable, safe experience for an inexperienced person. The key of the system is the physical stimuli from below for realistic experience compared to other conventional systems.
Naoto Yoshida +3 more
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Journal of Hydraulic Engineering, 2008
Ski jumps are a standard element of dam spillways for an efficient energy dissipation if takeoff velocities are large, and stilling basins cannot be applied. This laboratory study investigates the hydraulic performance of a triangular-shaped, rather than the conventional circular-shaped, bucket placed at the takeoff of ski jumps.
Steiner, Remo +3 more
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Ski jumps are a standard element of dam spillways for an efficient energy dissipation if takeoff velocities are large, and stilling basins cannot be applied. This laboratory study investigates the hydraulic performance of a triangular-shaped, rather than the conventional circular-shaped, bucket placed at the takeoff of ski jumps.
Steiner, Remo +3 more
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The Takeoff Forces in Ski Jumping
International Journal of Sport Biomechanics, 1989This study measured the takeoff forces exerted by jumpers during the 70-m ski jumping competition of the 1988 Winter Olympics in Calgary. Instrumentation consisted of four force plates installed under the snow of the takeoff platform. The results indicated that the greatest force was already exerted 149±9 ms before the release.
Mikko Virmavirta, Paavo V. Komi
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Journal of the American Medical Association (JAMA), 1978
Ski Jumping, ©. C. Jansky
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Ski Jumping, ©. C. Jansky
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Performance factors in ski jumping
Journal of Biomechanics, 2006Predominant performance factors in ski jumping are: High in-run velocity, high linear momentum perpendicular to the ramp at take-off due to the jumping movement and the utilisation of aerodynamic lift, accurate timing of the take-off jump with respect to the edge of the ramp, appropriate angular momentum at take-off in order to obtain an ...
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On CFD Simulation of Ski Jumping
2009Numerical analyses have been performed on a generic ski jumper in flight based on Computational Fluid Dynamics (CFD) flow codes and a geometric simulation of the jumper with skis. Various configurations have been simulated and results are presented for several body/ski positions and flight angles.
Helge Nørstrud, I. J. Øye
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2008
Ski jumping is very facinating in particular to the athletes necessary correct action when leaving the jump table and the ability to fast adopt to the flying position, see Figure 1. Open image in new window Figure 1 The two important stages (take-off and flying) of a modern ski jump. (Photo: Richard Sagen, Adresseavisen. Simulation: CFD norway).
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Ski jumping is very facinating in particular to the athletes necessary correct action when leaving the jump table and the ability to fast adopt to the flying position, see Figure 1. Open image in new window Figure 1 The two important stages (take-off and flying) of a modern ski jump. (Photo: Richard Sagen, Adresseavisen. Simulation: CFD norway).
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Synopsis of Current Developments: Skiing, Snowboarding and Ski Jumping
2006A total of 11 contributions demonstrate the diversity of research in the field of skiing, snowboarding and ski jumping. This shows how engineering methods can help to better understand the complex interaction between equipment and athlete and to better describe the physical phenomena behind these sports.
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