Abstract
The estimation of fracture strength of a spatial beam–rod structure is demonstrated in the sample of a locomotive cab. The calculated case of collision of the locomotive with an obstacle is considered. The estimation consists of three interrelated tasks. At the first stage, the finite-element model of a cab frame, taking into account a buffer device, is built and the structure rigidity determined. At the second stage a two-mass design diagram (locomotive–obstacle) is considered and the interaction force is determined. At the third stage, the finite-element model describing the stressed–deformed state of the cab design at the collision with the obstacle is built. The resulting load, determining the bearing capacity of the cab, is compared with different variants of calculated forces defined for interaction of the locomotive with various obstacles.
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