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鱼类巡游中的活体肌肉力学性能预测

张薇, 余永亮, 童秉纲   

  1. 中国科学院大学生物运动力学实验室, 北京 100049
  • 收稿日期:2014-02-26 修回日期:2014-03-16 出版日期:2014-07-23 发布日期:2014-03-31
  • 作者简介:余永亮,副教授,主要研究方向:生物运动力学,涡动力学.E-mail:ylyu@ucas.ac.cn
  • 基金资助:
    国家自然科学基金(10832010,11372310)和中国科学院知识创新工程重要方向(KJCX2-YW-L05)资助项目.

PREDICTION OF MECHANICAL PROPERTIES OF FISH MUSCLE IN VIVO DURING STEADY SWIMMING

Zhang Wei, Yu Yongliang, Tong Binggang   

  1. The Laboratory for Biomechanics of Animal Locomotion, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-02-26 Revised:2014-03-16 Online:2014-07-23 Published:2014-03-31
  • Supported by:
    The project was supported by the National Natural Science Foundation of China (10832010, 11372310) and the Innovation Project of the Chinese Academy of Sciences (KJCX2-YW-L05).

摘要: 在综合游动力学的框架下采用整体模化分析方法,对比研究了鳗鲡鱼类和鲹科鱼类巡游中红肌(驱动鱼类巡游的骨骼肌)的力学性能异同. 该方法将观测总结的鱼体动态变形规律作为已知条件,首先确定鱼游中体外作用(包括流体动力响应和惯性力),然后间接预测活体的体内作用(包括肌肉主动力和生物组织被动应力). 研究结果显示,鳗鲡鱼类尾部的肌肉强度明显低于其躯干部分,而鲹科鱼类尾部和躯干部分肌肉强度相当,这与各自的体内作用主导机制相适应. 且体外作用的区别也导致了鲹科鱼类的能效更高. 同时发现,两种模式游动下都存在鱼体躯干内部从头至尾的能量传递,其肌肉输出净功沿鱼体轴向都呈“钟形” 分布. 总体上沿轴向各点的肌肉都输出正的净功.

关键词: 鱼游|肌肉力学性能|机械能|综合游动力学

Abstract: This paper is a comparison study of the mechanical performance of the red muscle in vivo in cruise swimming of anguilliform and carangiform fishes, based on a global modeling of the integrated swimming mechanics. Given a lateral undulatory motion of the fish body, this modeling method could ascertain the external fluid force and the inertia force, and then indirectly predict the in vivo internal active muscle force and viscoelastic force due to the passive deformation of biological tissues. The results suggest that the strength of the caudal red muscle is significantly lower than that of the anterior in an anguilliform swimmer, while in a carangiform swimmer, the strength of red muscle is roughly equal in caudal and anterior part of the body. A higher energy efficiency is observed for a carangiform swimmer as a result of the different external forces experienced in the two swimming modes. It is also found that in both swimming modes, there exists an energy transmission from the anterior to the posterior, and the distribution of the net power produced by the active muscle along the fish body is characterized by a bell-shaped curve. Generally, the positive net power is produced at each axial position.

Key words: fish swimming|muscle’s mechanical properties|mechanical energy|integrated swimming mechanics

中图分类号: 

  • O352