A DYNAMIC SIMILARITY HYPOTHESIS FOR THE GAITS OF QUADRUPEDAL MAMMALS
A DYNAMIC SIMILARITY HYPOTHESIS FOR THE GAITS OF QUADRUPEDAL MAMMALS
复制标题
DOI：
10.1111/j.1469-7998.1983.tb04266.x
复制
发表时间：
1983-01-01
影响因子：
2
通讯作者：
JAYES, AS
中科院分区：
文献类型：
--
作者：
ALEXANDER, RM;JAYES, AS
动态相似性假说假定，不同的哺乳动物无论何时以相同的无量纲参数弗劳德数的速度移动时，都会以动态相似的方式移动。因此，给出关于一个物种的信息，就有可能为其他物种预测步态的大小、速度和步态特征之间的关系，如步长、占空比、脚的相位关系和地面上施加的力的模式。不同哺乳动物样本的数据被用来验证这一假设。在许多情况下，当比较限于Jenkins(1971)所描述的那种类型的四足哺乳动物时，它被发现是站得住脚的。大多数质量大于5公斤的哺乳动物都属于这种类型。尽管这一假说不太适用于曲线哺乳动物和非曲线哺乳动物之间的比较，但它被证明是一个合理的近似值，即使对于这种比较，对于四足哺乳动物与两足哺乳动物和鸟类之间的比较也是如此。
The dynamic similarity hypothesis postulates that different mammals move in a dynamically similar fashion whenever they travel at speeds that give them equal values of a dimensionless parameter, the Froude number. Thus, given information about one species, it could be possible to predict for others relationships between size, speed and features of gait such as stride length, duty factor, the phase relationships of the feet and the patterns of force exerted on the ground.Data for a diverse sample of mammals have been used to test the hypothesis. It is found to be tenable in many cases when comparisons are confined to quadrupedal mammals of the type described by Jenkins (1971) as “cursorial”. Most mammals of mass greater than 5 kg are of this type. Although the hypothesis applies less successfully to comparisons between cursorial and non‐cursorial mammals it is shown to be a reasonable approximation even for such comparisons and for comparisons between quadrupedal mammals and bipedal mammals and birds.