Energy conversion in woodpecker on successive peckings and its role on anti-shock protection of brain  

作　　者：ZHU ZhaoDan ZHANG Wei WU ChengWei 

机构地区：[1]State Key Lab of Structural Analysis for Industrial Equipment, Dalian University of Technology

出　　处：《Science China(Technological Sciences)》2014年第7期1269-1275,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11272080);the Doctoral Education Foundation of China Education Ministry(Grant No.20110041110021);the Fundamental Research Funds for the Central Universities of China(Grant No.DUT14LK36)

摘　　要：To investigate the mechanism of brain protection of woodpecker,we built a finite element model of a whole woodpecker using computed topography scanning technique and geometry modeling.Dynamic analyses reveal:(i)99.7%of the impact energy is converted into strain energy in the bulk of body and 0.3%is converted into strain energy in the head after three successive peckings,indicating the majority of the impact energy is stored in the bulk of body;(ii)the strain energy in brain is mainly converted into the dissipated energy,alleviating the mechanical injury to brain;(iii)the deformation and the effective energy dissipation of the beaks facilitate the decrease of the stress and impact energy transferred to the brain;(iv)the skull and dura mater not only provide the physical protection for the brain,but also diminish the strain energy in the brain by energy dissipation;(v)the binding of skull with the hyoid bone enhances the anti-shock ability of head.The whole body of the woodpecker gets involved in the energy conversion and forms an efficient anti-shock protection system for brain.

关 键 词：WOODPECKER ANTI-SHOCK energy conversion brain protection 

分 类 号：Q958[生物学—动物学]