THE FINITE ELEMENT ANALYSIS OP ELASTO-VISCOPLASTICITY FOR INTERACTION BETWEEN VERTICAL BLADE-SHAPED FOOT OP WALKING BOAT-TYPE TILLAGE MACHINE AND PADDY SOIL

摘要

In order to raise the tractive efficiency of the boat-type tillage machine, according to a point of view about reducing energy consumption by reducing the volume of blade cavity, we have put forward an imagine of four feet walking boat-type tillage machine and designed and manufactured a walking device which has two feet and four small wheels preliminarily. It can walk on the railway of small paddy soil bin. In this paper, we only describe the finite element analysis of elasto-viscoplasticity for interaction between its vertical blade-shaped foot and paddy soil. Test and calculation show a good agreement between them. In addition, we can get larger tractive force if we raise the travel speed of boat-type tillage machine, because this may reduce the interaction time between blade foot and soil, i.e., raise loading speed.