Abstract
The article considers the multiparameter problem of the mechanical system behavior and its survivability when destructing individual elements. The technique for constructing the area of safe operation of the cabin of the GT1-h gas turbine locomotive was illustrated on the example of collision of a locomotive with an obstacle at a crossing. The main parameters determining the energy of interaction between the cabin and the obstacle was singled out, and their influence on the survivability of the structure was analyzed. The finite element method was used to calculate the load-bearing capacity of a power frame with a buffer device in the initial state and after the destruction of individual structural elements by the dynamic strength criterion. The force of elastic interaction between the locomotive and the obstacle was estimated through the spring, the rigidity of which was estimated on the basis of the finite element calculation results. As a result of the calculations, proposals were developed to strengthen the cabin frame to ensure the safety of the crew and the instrument part in case of unauthorized collision with an obstacle of considerable mass and violation of the speed regime.
Highlights
The problem of maintaining the load-bearing capacity of a metal structure after destruction of individual elements is known as the problem of the survivability of structures
Estimation of a real structure survivability is reduced to solving a nontrivial multiparameter problem of constructing a safe operation area in a certain functional space [1,2,3,4,5]
The performed calculations of the gas turbine locomotive cabin allowed making a reasoned conclusion about the need to strengthen the structural frame of the structure
Summary
The problem of maintaining the load-bearing capacity of a metal structure after destruction of individual elements is known as the problem of the survivability of structures. Estimation of a real structure survivability is reduced to solving a nontrivial multiparameter problem of constructing a safe operation area in a certain functional space [1,2,3,4,5]. The task of such a large scale can have an ambiguous solution, different levels of strictness in formulation of particular problems, and ways of presenting the results. The situation is complicated by the fact that the initial data on the design and the nature of external impact are almost never sufficiently complete For this reason, there is no single scheme or any single-valued algorithm for solving such problems.
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