蚯蚓爬行的生物力学分析与数值计算

蚯蚓是典型的多体节动物。本文从生物力学的角度，分析了蚯蚓在静止和运动状态下的体壁应力，又分析了蚯蚓爬行过程中的变形以及与地面之间的摩擦力，给出了蚯蚓在地表爬行的动力学模型。进一步，又数值计算了一定质量范围的蚯蚓在静止和运动状态下体壁承受的最大应力和动力学模型方程，得到蚯蚓爬行的平均速度与质量的关系。计算结果与实验观测值基本一致。 

Biomechanical analysis and numerical calculation of earthworm crawling

Earthworm is a typical multi-body segment and soft-bodied animal. In this paper starting from a biomechanical point of view we analysis the tensile stress of the body wall during rest and peristaltic crawling and describes the deformation coupled with a simple friction model during peristaltic crawling. We calculate the body wall stress and crawling velocity for a certain range of mass of earthworms . The dynamic equation of earthworm crawling is presented and calculated numerically. Numerical results show that the mean speed of earthworm crawling for different mass is consistent with experimental value.