Modal Analysis of a Tensegrity Structure – an experimental study
نویسندگان
چکیده
Tensegrity structures are a special class of lightweight truss structures, where all truss elements are axially loaded and tensile truss elements are made of strings. This paper presents the dynamic analysis of a tensegrity structure by comparing a finite element model with an identified model obtained from experimental data. Experimental data is obtained by placing a three stage tensegrity structure on a shaker table and measuring frequency responses between the moving support and multiple accelerometers placed on the structure. An identified Single-Input-Multiple-Output (SIMO) linear model is found by a SIMO curve fitting of the measured frequency responses. To complete the dynamic analysis, the estimated model along with the identified resonance modes and damping coefficients are used to compare and fine tune a fine element based model.
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