A Mechanical Analysis of Woodpecker Pecking Mechanism for Shock-Absorbing

C. C.Su ； T. K. Chang ； S. T. Tsai ； F. L. Yang ； W. P. Shih ； S. H. Chang

《Proceedings of the 14th IFToMM World Congress》 14th-1 (2015/10) Pp. 56-61

https://doi.org/10.6567/IFToMM.14TH.WC.OS1.012

並列摘要

We built a woodpecker pecking model including the head and the body at a high pecking velocity and a great deceleration. The analysed results indicate that the acceleration of the brain is efficiently reduced by the cerebrospinal fluid damping coefficient (C_(CSF)). The acceleration can be reduced 63.4% at the C_(CSF) of 26.4 Ns/m using the ADAMS optimization function. In addition, the acceleration of the head is reduced the acceleration of 22% with reduced the cerebrospinal fluid thickness from 0.25 to 0.1 mm. Moreover, the woodpecker has a discontinuous impact period due to the stiffness of the neck during the drumming cycle. For the combined mechanical model of a woodpecker, the acceleration of the woodpecker can be reduced to 56.7% with the optimum condition, which included the head, the neck, and the body.

並列關鍵字

woodpecker ； cerebrospinal fluid ； pecking mechanism