Influence of the postion of crew members on aerodynamics performance of two-man bobsleigh

Dabnichki, Peter; Avital, Eldad

doi:10.1016/j.jbiomech.2005.10.011

Cited by 52 publications

(30 citation statements)

References 8 publications

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“…Through the involvement of engineering, athletic performance improved. This was especially true for those equipments strongly influenced by aerodynamics, such as javelin, discus and bobsleigh [4,9,10].…”

Section: Equipment Fitmentioning

confidence: 99%

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Shan¹

2008

TOSSJ

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Abstract:In current sport equipment evaluation and optimization, most studies consider the body and an equipment together as one system. This is partially because equipment optimization is mainly done through modification of mechanical designs, thus equipment evaluation is conducted through statistical comparisons of how different mechanical designs perform under human usage. However, it is known that any change in the performance environment would cause one to adapt certain aspects of his or her movements. Variation in equipment is considered as such a performance-altering environmental change. Yet, this equipment-induced motor control change is hardly studied in sport equipment evaluation/optimization, such as studies on golf clubs, pole-vaulting poles and hockey sticks. Without a thorough understanding of the interactions between equipment alteration and human motor control adaptation, equipment optimization is like a hit-and-miss game. Therefore this paper aims: 1) to look back at the different generations (eras) in the development of sports equipment, 2) to elaborate the roles of engineering and sport science/motion analysis technology in each generation and 3) to discuss the essence of sport science research in sport equipment optimization, which has evolved beyond pure engineering. One focus of this review is on body-equipment interactions and body movement adjustments in response to different equipment designs. Both these aspects should ideally be included in future studies related to sports equipments.

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Section: Equipment Fitmentioning

confidence: 99%

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Shan¹

2008

TOSSJ

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“…In sports, some tests have been performed to compare the numerical results with experimental results also. A combined CFD and experimental study on the influence of the crew position on the bobsleigh aerodynamics was conducted by Dabnichki and Avital (2006). The experimental results obtained in a wind tunnel suggested that the adopted computational method is appropriate and yields valid results.…”

Section: Validity Reliability Accuracymentioning

confidence: 99%

Modelling Hydrodynamic Drag in Swimming using Computational Fluid Dynamics

Marinho¹,

Barbosa²,

Kjendlie³

et al. 2010

Computational Fluid Dynamics

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“…Efforts have been made to improve these factors and ultimately shorten the time (Chowdhury et al, 2015;Ubbens et al, 2016). However, recently, the importance of the start stage is being emphasized (Dabnichki and Avital, 2006). In the start stage, the explosive power of the athletes for pushing the sled is considered important, but the role of a shoe that can thrust the explosive power of the athletes to the slippery ice surface is equally important.…”

Section: Introductionmentioning

confidence: 99%

I7-1　Development of bobsleigh shoe in preparation for the 2018 Pyeongchang Winter Olympics

Park

Lee

Kim

et al. 2017

The Japanese journal of ergonomics

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In this study we aimed to provide necessary basic data by elucidating the relationship between toe spring angle(TSA) and start sprint lap time in bobsleigh shoes, in order to develop Korean-specific bobsledding shoes. The participants of the present study consisted of 6 reserve members of the Korean national bobsleigh team who received sufficient explanation on the objective of the study and volunteered to participate. The bobsleigh shoes used in the experiment were prototypes developed by "T" Corporation, which consisted of types A, B, and C with TSAs of 30, 35, and 40, respectively. To analyze the time taken during the start, digital run-time meters (SR-500SP, Seed Tech, Korea) were set up at intervals of 0-5, 5-10, and 0-10 m for data collection. Moreover, to measure the fore foot bending angle(FBA) during the bobsleigh start motion, a high-speed camera (S-pri, AOS, Switzerland) was set up on the outside of the track, approximately 5 m from the start line, for collection of data at a rate of 1,000 frames/sec. For the FBA measurements, 7 markers (points 1-7) were attached on the sides of the outsole in the forefoot and midfoot areas. The internal angle created by lines connecting 3 points in the central area of the 7 attached markers was defined as a single angle and analyzed accordingly. The results of the analysis of the time required in the bobsleigh start stage showed significant differences between the shoes at the interval of 5-10 m, with post hoc test results indicating a statistically significant difference between the type C and A shoes (*p < .05). Moreover, the results of the analysis of FBA in the bobsleigh start stage showed significant differences between the shoes at angles 2, 3, 4, and 5. The post hoc test results indicated significant differences between types B and C at angle 2 (**p < .01); types A and C at angle 3 (**p < .01); types A and C, and types B and C at angle 4 (***p < .001); and types A and B, and types B and C at angle 5 (**p < .01). As running speed increases, FBA should also increase, but excessive forefoot bending can lead to plantar fasciitis injury and increased fatigue. Meanwhile, excessive bending restriction can reduce the efficiency of using the ground reaction force and cause limited range of motion, which act as obstacles to sports performance. Type C shoes were designed to have a TSA of 40; as such, they induced the most suitable FBA at angles 3 and 4, which correspond to the metatarsal joint, in providing the bending moment for the driving force of the bobsleigh athletes, which contributed to the shortening of the time record in the start stage.

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Influence of the postion of crew members on aerodynamics performance of two-man bobsleigh

Cited by 52 publications

References 8 publications

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Modelling Hydrodynamic Drag in Swimming using Computational Fluid Dynamics

I7-1　Development of bobsleigh shoe in preparation for the 2018 Pyeongchang Winter Olympics

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Influence of the postion of crew members on aerodynamics performance of two-man bobsleigh

Cited by 52 publications

References 8 publications

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Sport Equipment Evaluation and Optimization - A Review of the Relationship between Sport Science Research and Engineering

Modelling Hydrodynamic Drag in Swimming using Computational Fluid Dynamics

I7-1 Development of bobsleigh shoe in preparation for the 2018 Pyeongchang Winter Olympics

Contact Info

Product

Resources

About

I7-1　Development of bobsleigh shoe in preparation for the 2018 Pyeongchang Winter Olympics