BASIC MATHEMATICAL FORM OF MICHELL STRUCTURE

  • Sanaullah Khushak Harbin Engineering University, College of Mechanical and Electrical Engineering, Harbin, China
  • Ani Luo Harbin Engineering University, College of Mechanical and Electrical Engineering, Harbin, China
  • Muhammad Basit Chandio Harbin Engineering University, College of Mechanical and Electrical Engineering, Harbin, China
  • Asif Raza Harbin Engineering University, College of Mechanical and Electrical Engineering, Harbin, China
Keywords: force density, mathematical form, Michell structure, minimal mass, tensegrity structure

Abstract


Michelle structure is well known due to its optimization form & minimum mass of the structure. The idea has been adopted by James C Maxwell’s result on truss design. In this paper, we have presented the simple mathematical model of Michelle structure for the basic complexity order q=2 in the two-dimensional coordinate system. This mathematical model based on the construction of a structure that includes the analysis coordinate of all Nodes, and all member location of the structure along with analysis of their Connectivity matrices; these parameters form a whole tensegrity system of Michelle structure. The force density in each member of the structure has been investigated on every single node of structure individually. The mathematical form of structure has been developed in this research, which can be helpful to develop the high order complexity structure by applying the same methodology. The selection of bars and string has been carried out in a simple way. Moreover, the expression for calculating the minimum mass of structure has been defined at the end of this paper, which is the most important factor for constructing any kind of tensegrity structure.

References

Rene, M. (2003). Tensegrity Structural Systems for the Future. pp.7-16.

Jing, Y, Z., Makoto, O. (2015). Tensegrity Structures, Form, Stability, and Symmetry. Springer, vol 6, pp 1-11. Doi. 10.1007/978-4-431-54813-3

Robert, E, S., Mauricio, C, d, O. (2009). Tensegri¬ty Systems. Springer, New York. pp 1-43, 129-154. Doi. 10.1007/978-0-387-74242-7

Heping, L., Jingyao, Z., Makoto, O. (2018) .3- bar tensegrity units with non-equilateral triangle on an end plane. vol. 92, pp. 124-130. https://doi. org/10.1016/j.mechrescom.

Dhanjoo, G, N., Meyer M, R. (1968). Development of Michell Minimum Weight Structures.

Prager, W. (1977). Optimal Layout of Cantilever Trusses. Journal of Optimization Theory and Appli¬cations, vol. 23, no. 1.

Rozvany, G, I, N. (1996). Some shortcomings in Mi¬chell's truss theory. Springer, vol. 12, p. 6,

Muhammad, B, C., Ani, L., Yaohui, L., Sanaul¬lah, K., Asif, R. (2019). The Dynamic similarity of Six Bar Ball Tensegrity Structure in Compression and Expansion Processes. Journal of Harbin Insti¬tute of Technology. (New Series). Doi: 10.11916/j. issn.1005-9113.2019032.

Guest, S, D., Koohestani, k. (2013). A new approach to the analytical and numerical form-finding of tensegrity structures. International Journal of Solids and Structures. Vol. 50, issue 19. doi.10.1016/ijsol¬str.2013.05.014.

Ani, L., Robort, E, S., Heping, L., Rongqiang, L., Hongwei, G., Longkun, W. (2014). Structure of the ball tensegrity robot. IEEE.

Nagase, k. Robert, E, S. (2014). Minimal Mass De¬sign of Tensegrity Structures, Journal of the Interna¬tional Association for Shell and Spatial Structures. vol.55, no.1.

Published
2021/03/03
Section
Original Scientific Paper