Dynamic properties of a dirt and a synthetic equine racetrack surface measured by a track-testing device.
Dynamic properties of a dirt and a synthetic equine racetrack surface measured by a track-testing device.
复制标题
通过跑道测试设备测量泥土和合成马跑道表面的动态特性。
DOI：
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发表时间：
2013
影响因子：
2.2
通讯作者：
Susan M. Stover
中科院分区：
文献类型：
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作者：
Jacob J. Setterbo;P. Fyhrie;M. Hubbard;Shrinivasa K. Upadhyaya;Susan M. Stover
进行研究的原因
跑道表面是纯种赛马受伤和死亡的风险因素，可以设计和管理。为了研究表面和损伤之间的关系，必须量化污垢和合成轨道表面的机械行为。
目标
使用设计用于模拟马蹄冲击的跟踪测试装置，比较污垢和合成表面的动态特性;并确定冲击速度、冲击角度和重复冲击对动态表面行为的影响。
方法
轨道测试装置测量了在3种冲击速度（1.91、2.30、2.63 m/s）、2种冲击角度（与垂直方向成0°、20°）和2次连续冲击（初始、重复）下冲击到污垢和合成表面期间的力和位移。每天在3个位置测量表面，持续3天。采用方差分析法研究了表面类型、冲击速度、冲击角度和冲击次数对动态表面性能的影响。
结果
合成表面最大力、载荷率和刚度为污垢表面值的37-67%。表面的刚性较低的冲击速度，角度的影响和初始的影响。污垢和合成表面之间的差异的幅度增加重复的影响和更高的影响速度。
结论
合成材料的表面通常比污垢表面更柔软。重复冲击的硬度大大增加，这证实了维护的重要性。不同撞击速度下的结果表明，在较高的撞击速度下，表面差异将持续存在。
潜在相关性
对于这两种表面，显然重要的是要防止马匹暴露于预压表面，特别是在高速训练时，表面已经被践踏。这些数据应该是有用的，在协调跑道表面管理与赛马训练，以防止受伤。
REASONS FOR PERFORMING STUDY
Racetrack surface is a risk factor for Thoroughbred racehorse injury and death that can be engineered and managed. To investigate the relationship between surface and injury, the mechanical behaviour of dirt and synthetic track surfaces must be quantified.
OBJECTIVES
To compare dynamic properties of a dirt and a synthetic surface in situ using a track-testing device designed to simulate equine hoof impact; and to determine the effects of impact velocity, impact angle and repeated impact on dynamic surface behaviour.
METHODS
A track-testing device measured force and displacement during impact into a dirt and a synthetic surface at 3 impact velocities (1.91, 2.30, 2.63 m/s), 2 impact angles (0°, 20° from vertical), and 2 consecutive impacts (initial, repeat). Surfaces were measured at 3 locations/day for 3 days. The effects of surface type, impact velocity, impact angle and impact number on dynamic surface properties were assessed using analysis of variance.
RESULTS
Synthetic surface maximum forces, load rates and stiffnesses were 37-67% of dirt surface values. Surfaces were less stiff with lower impact velocities, angled impacts and initial impacts. The magnitude of differences between dirt and synthetic surfaces increased for repeat impacts and higher impact velocities.
CONCLUSIONS
The synthetic surface was generally softer than the dirt surface. Greatly increased hardness for repeat impacts corroborates the importance of maintenance. Results at different impact velocities suggest that surface differences will persist at higher impact velocities.
POTENTIAL RELEVANCE
For both surfaces it is clearly important to prevent horse exposure to precompacted surfaces, particularly during high-speed training when the surface has already been trampled. These data should be useful in coordinating racetrack surface management with racehorse training to prevent injuries.