关键词: 工程仿生学 蝉口针 减阻 回归设计 锯齿形

Abstract: To obtain the saw tooth bionic needle of which drag reduction effect is best using test optimization design and analyze its mechanism of drag reduction. Based on the non-smooth shape on the mandible stabber surface of cicada, combined with the penetration mechanism analysis of the cicada stabber, designing the saw tooth bionic needle; Using the binary quadratic regression and orthogonal combination test optimization design method to research the influence rule of the bio-mimetic structure parameters, the width of serrate and the interval of serrate, to the puncture resistance of syringe needle, so as to gain a regression equation. The structure parameters of the optimal bionic saw tooth needle are that the width of serrate is 0.3mm and the interval of serrate is 2.5mm, and its drag reduction rate is 43.21%. The saw tooth bionic needles achieved drag reduction effect by decreasing contact area, forming rolling bearing model and producing microseism. It provides the basis for the development of the bionic painless needles.

Key words: Engineering bionics Saw tooth Drag reduction Regression design Cicada stabber