Stand for Researching Contact Interaction in the System Ground — Elastic Cover — Wave Generator System of the Elastic-Screw Drive

The article shows that for ensuring sufficient bearing capacity of the high floatation chassis based on the elastic-screw drive and for adaptation of the drive to the changing underlying surface, the excessive pressure may change in a wide range.  At that, the form of a contact area will take various configurations. In particular, a flat surface will be characteristic of the soil with low bearing capacity, and friable snow. The existing methods of calculation and creation of equilibrium profiles of elastic screw drive grid covers with asymmetrical laying of threads do not fully reflect the nonlinearity of a contact problem. The geometrical non-linearity of the cover and complex mechanical behavior of the soil require a verification of calculation methods, for example through full-scale experiments on a finished product, or on a mock-up on a testing stand. For this purpose on the basis of the existing stand, which was designed to research the interaction of the soil with wheel and caterpillar drives, a conceptually new stand has been created. The new stand allows researching deformed states and contact forces in the system ground – elastic cover – wave generator of the elastic-screw drive. Experimental research that can be carried out on the stand makes it possible to verify the mathematical model, methods of calculation and computer programs developed to study elastic-screw drives.

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