Biomechanics and Biotensegrity: Study Method and Frequency Response of the Simplex and 3-bar-SVD Tensegrity Configurations

20th Argentinean Bioengineering Society Congress

物理学;生物科学

Castro Arenas, C.^1,2 ; Ghersi, I.^2,3 ; Miralles, M.T.^2,3

Centro Laboratorio de Morfologia, Instituto de la Espacialidad Humana, Facultad de Arquitectura Diseo y Urbanismo, Universidad de Buenos Aires, Cuidad Universitaria, CABA, Buenos Aires, Argentina^1

Centro de Investigación en Diseo Industrial de Productos Complejos, Facultad de Arquitectura Diseo y Urbanismo, Universidad de Buenos Aires, Cuidad Universitaria, CABA, Intendente Guiraldes 2160, Buenos Aires, Argentina^2

Pontificia Universidad Católica Argentina, LaBIS-Facultad de Ciencias Fisicomatemáticas e Ingenieria-UCA, CABA, Av. A. Moreau de Justo 1500, Buenos Aires, Argentina^3

关键词: Axis of symmetry;    Characteristic frequencies;    Frequency response analysis;    Natural fields;    Study methods;    Tensegrity structure;    Three dimensions;    Video analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/705/1/012018/pdf
DOI  :  10.1088/1742-6596/705/1/012018

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

The purpose of this work is to study the frequency response of 3D tensegrity structures. These are structures that have been used, since the 80's, to model biological systems of different scales. This fact led to the origin of the field of biotensegrity, which includes biomechanics as a natural field of application. In this work: a) A simple method for the analysis of frequency response of different nodes in 3D tensegrity structures was set up and tuned. This method is based on a video-analysis algorithm, which was applied to the structures, as they were vibrated along their axis of symmetry, at frequencies from 1 Hz to 60 Hz. b) Frequency-response analyses were performed, for the simplest 3D structure, the Simplex module, as well as for two towers, formed by stacking two and three Simplex modules, respectively. Resonant frequencies were detected for the Simplex module at (19.2±0.1) Hz and (50.2±0.1) Hz (the latter being an average of frequencies between homologous nodes). For the towers with two and three modules, each selected node presented a characteristic frequency response, modulated by their spatial placement in each model. Resonances for the two-stage tower were found at: (12±0.1) Hz; (16.2±0.1) Hz; (29.4±0.1) Hz and (37.2±0.1) Hz. For the tower with three Simplex modules, the main resonant frequencies were found at (12.0±0.1) Hz and (21.0±0.1) Hz. Results show that the proposed method is adequate for the study (2D) of any 3D tensegrity structure, with the potential of being generalized to the study of oscillations in three dimensions. A growing complexity and variability in the frequency response of the nodes was observed, as modules were added to the structures. These findings were compared to those found in the available literature.