Finite element analysis on double-telescopic prop of hydraulic support

Abstract

According to Chinese coal industry standard MT313-1992 and European standard EN 1804-2-2001, using the modern CAE technology, based on the coupling meshing technology of structured grids and unstructured grids, the finite element strength analysis on 360-type double-telescopic prop is carried out under axial 1.5 times, axial 2.0 times rated load and off-center 0.3R 1.1 times rated load. The stability of the prop is studied using the buckling analysis. The results show that without regard to the dynamic load, the prop can bear 2.0 times axial pressure and 1.1 times off-center 0.3R pressure, and the stress distribution is even. Except the guide sleeve-I and the middle cylinder, other parts have high safety coefficient and can be optimized. The critical buckling load coefficient of the prop is 2.764, and the buckling instability of the type of prop will not happen if used under the rated working condition set by Chinese coal industry standard MT313-1992 and European standard EN 1804-2-2001. The paper can provide the basis for setting new related technology standard.

DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1896