DOI QR코드

DOI QR Code

Dynamic model of hinge deflection in fluid flow

유동 내 굽힘이 발생하는 힌지의 역학 모델

  • Received : 2022.10.25
  • Accepted : 2023.01.16
  • Published : 2023.03.31

Abstract

For application to drag-based propulsion system, the dynamics of a segmented structure with multiple hinges undergoing oscillatory motion are investigated. The side flaps are connected to a centre rod with elastic plates acting as hinges. The hinges bend to only one direction so that the structure behave asymmetrically between the power stroke and the recovery stroke. An analytical model is proposed, which estimates the asymmetric deformation of the segmented structure coupled with hinges. Using the proposed model, the effects of key geometric and kinematic parameters on the dynamics of the structure are analyzed.

Keywords

References

  1. Walker, J. A. & Westneat, M. W., 2000, "Mechanical performance of aquatic rowing and flying," Proc. R. Soc. Lond. B, 267, pp.1875-1881. https://doi.org/10.1098/rspb.2000.1224
  2. Walker, J. A. & Westneat, M. W., 2002, "Kinematics, dynamics, and energetics of rowing and flapping propulsion in fishes," Interg. Comp. Biol., 42, pp.1032-1043. https://doi.org/10.1093/icb/42.5.1032
  3. Lauder, G. V. & Jayne, B. C., 1996, "Pectoral fin locomotion in fishes: testing drag-based models using three-dimensional kinematics," Amer. Zool., 36, pp.567-581. https://doi.org/10.1093/icb/36.6.567
  4. Behbahani, S. B. & Tan, X., 2016, "Bio-inspired flexible joints with passive feathering for robotic fish pectoral fins," Bioinspir. Biomim., 11, 036009.
  5. Alben, S. et al., 2002, "Drag reduction through self-similar bending of a flexible body," Nature, 420, pp.481-497. https://doi.org/10.1038/nature01232
  6. Gosselin, F. & de Langre, E., 2011, "Drag reduction by reconfiguration of a poroelastic system," J. Fluids Struct., 27, pp.1111-1123. https://doi.org/10.1016/j.jfluidstructs.2011.05.007
  7. Luhar, M. & Nepf, H. M., 2016, "Wave-induced dynamics of flexible blades," J. Fluids Struct., 61, pp.20-41. https://doi.org/10.1016/j.jfluidstructs.2015.11.007
  8. Vogel, S., 1984, "Drag and flexibility in sessile organisms," Amer. Zool., 24, pp.37-44. https://doi.org/10.1093/icb/24.1.37
  9. Vogel, S., 1989, "Drag and reconfiguration of broad leaves in high winds," J. Exp. Bot., 40, pp.941-948. https://doi.org/10.1093/jxb/40.8.941
  10. Ishihara, D. et al., 2009a, "A two-dimensional computational study on the fluid-structure interaction cause of wing pitch changes in dipteran flapping flight," J. Exp.Biol., 212, pp.1-10. https://doi.org/10.1242/jeb.020404
  11. Ishihara, D. et al., 2009b, "Passive maintenance of high angle of attack and its lift generation during flapping translation in crane fly wing," J. Exp. Biol., 212, pp.3882-3891. https://doi.org/10.1242/jeb.030684
  12. Wu, K. S. et al., 2019, "Scaling of the performance of insect-inspired passive-pitching flapping wings," J. R. Soc. Interface, 16, 20190609.
  13. Keulegan, G. H. & Carpenter, L. H., 1958, "Forces on cylinders and plates in an oscillating fluid," J. Res. Natl. Bur. Stand., 60, pp.423-440. https://doi.org/10.6028/jres.060.043