Experimental determination of dissipative characteristics of the variable-stiffness serpentine spring coupling under the torsional vibrations

The paper presents results of an experimental study of dissipative properties of the variable-stiffness serpentine spring couplings. These couplings are fairly widely used in the drives for machine tools and heavy engineering applications operating under the high dynamic loads. The study applies the well-known experimental method of a static hysteresis loop. The paper considers a most typical case of the torsional vibrations associated with twisting of the drive shafts connected by the coupling. It describes a specially designed and manufactured laboratory testing bench, testing methodology, and an experimental coupling prototype. The paper provides quantitative characteristics of the coupling dissipative properties including the coupling dissipation coefficients (relative scattering). It analyzes the obtained experimental data. Study results could be used in dynamic computation of the machine drives for various industrial applications under the type of vibration considered.
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