检索结果-南通市图书馆

How ploughing and frictional melting regulate ice-skating friction

摩擦:英文版 2023年第11期11卷 2036-2058页

作者： Feng DU Peng KE Ping HONG School of Transportation Science and Engineering Beihang UniversityBeijing 100191China Beijing Sports University Beijing 100084China

The slipperiness of ice is well known while,for ice skating,its mechanism still needs further investigation,where the complex interactions including the thermal conduction of the skate–meltwater–ice system,the ploughing and the frictional melting of ice to the friction force are still unclear.This study presents a theoretical framework and a simplified analytical solution to unveil the friction mechanism when a curved skate sliding on ice.The theory is validated by experiments and the effects of these various factors,including the sliding velocity,the ice temperature,the supporting weight,and the geometry of the skate blade to the friction are revealed in detail.This study finds that the contribution of friction force from the ploughing deformation through skate indentation and that from the fluid friction through the shear motion of the meltwater layer is comparable with each other,which thus clarifies how the ploughing deformation of the ice substrate together with its frictional melting regulates the friction during skating.

关键词： ice friction skating ploughing frictional melting coefficient of friction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PRELIMINARY ANALYSIS OF skating MOTION

引用

Applied Mathematics and Mechanics(English Edition) 2002年第1期23卷 114-118页

作者： HU Hui(胡辉) Department of Mathematics and Physics Xiangtan Polytechnic UniversityXiangtan Hunan 411201 P R China

A mechanical model of skating motion was founded, and its solution was obtained by using the Routh's equations in nonholonomic dynamics. The two kinds of common, local meaning and scleronomic motions were discussed in... 详细信息

关键词： nonholonomic dynamics skating scleronomic motion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Study on The Merit Combination Application of The Teaching Method of skating and Speed skating

The Study on The Merit Combination Application of The Teachi...

引用

2010 International Conference on Computer Science and Sports Engineering (CSSE 2010)

作者： Jia Hong gang Sports section academy Harbin Normal University Harbin China Yang Xiu jun Sports section academy Harbin Normal University Harbin China

Through expert interviews, experiments and mathematical statistical method, such as motor skills of skating and speed skating migration research, and applied to college teaching skating and speed skating, improve teac... 详细信息

关键词： Migration skating Speed skating formatting style

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Longitudinal Changes in Athletic Performance in Competitive Figure Skaters

引用

Journal of Science in Sport and Exercise 2021年第4期3卷 332-339页

作者： Jacquelyn P.Cruz Melissa Vriner L.Colby Mangum Lindsay Slater Feinberg School of Medicine Northwestern UniversityChicagoILUSA Athlete High Performance Department United States Figure SkatingColorado SpringsCOUSA Athletic Training Research Laboratory Institute of Exercise Physiology and Rehabilitation ScienceUniversity of Central FloridaOrlandoFLUSA Department of Physical Therapy University of Illinois at Chicago1919 W.Taylor StreetChicagoIL 60612USA

Purpose To measure changes in strength,power,and agility over consecutive seasons based on competition level in figure skaters.Methods A total of 197 competitive singles figure skaters(age range=9-25 years old)completed combines with United States Figure skating on two consecutive seasons between 2011 and 2018.Skaters either remained in the same competitive on-ice level or increased by one level on consecutive seasons.All athletes completed the hexagon agility test,maximal verti-cal jump,timed tuck jumps,push-ups,and bent knee v-ups.Repeated-measures analyses of variance separated by sex with Tukey’s post hoc were performed for each dependent variable and Cohen’s d effect sizes were calculated for all significant differences.Results Female skaters who remained in the same level demonstrated improved performance on vertical jump(3.66 cm higher),timed tuck jumps(3.77 more jumps),v-ups(1.59 more v-ups),and hexagon jump(1.17 s faster).There was an interaction for female skaters who remained in the same level(P=0.004),with senior and junior levels outperforming inter-mediate level skaters on the hexagon jump test.Female skaters who increased level demonstrated improved performance on the vertical jump(2.24 cm higher),hexagon jump(1.16 cm faster),and tuck jump(3.03 more jumps).Male skaters did not demonstrate any changes in performance except v-ups(2.86 more v-ups)for those who increased level.Conclusions The greatest changes were in lower level female skaters who remained in the same level,supporting the impor-tance of participating in strength and conditioning programs earlier in skating careers to maximize athleticism before reaching the senior level,when changes in off-ice performance plateau.

关键词： Athlete Strength Power skating

来源：

维普期刊数据库评论