Nauka ta progres transportu (Jun 2017)
EXPERIMENTAL EVALUATION OF SHOCK SPECTRUM RESPONSE OF ROLLING STOCK
Abstract
Purpose. The article is aimed to analyze the increase in the effectiveness of traditional methods for carrying out shock tests of land vehicles, in order to assess their strength, reliability and durability. Methodology. To achieve this purpose, the authors of the article developed a technique for conducting impact tests and effective algorithm based on the ideas and methodological proposals contained in the UN Guidelines on the “Recommendations for Transportations of Dangerous Goods”. Findings. With the use of the modern programming language SI-Sharp, a specialized software package was created that implements the algorithm for handling shock processes, which has a "friendly" interface with the user of this complex and other software products of the computing environment powered by Windows. With the application of this complex, the results of tests of the tank-container of the model CTL-26/0.4, type UN T14 under different shock loading (collision rates), geometric, inertial and damping parameters of this design were processed. As a result, an objective evaluation of the properties of the tested object was obtained, and a conclusion was made that the calculated shock response spectrum (SRS) was exceeded, its minimum permissible value in the entire spectrum of the investigated frequencies. Originality. For the first time, a complex theoretical and practical approach to the study of the strength, reliability, and durability of transport mechanical structures subjected to impact loads on the basis of the evaluation of the impact response spectra was realized. Practical value. The application of the proposed methodology and the developed software package for carrying out shock tests made it possible to increase the reliability of these tests, to shorten the time of their testing and to process the results. The results of the testing of the tank-container tests showed that this vehicle fully provides the required normative parameters of strength, reliability and durability. This is also confirmed by the fact that after the shock tests carried out in the structure under investigation there were no structural damages, residual deformations and no leakage of the goods transported. The article concludes that it is possible to use the developed technique for carrying out shock tests and implementing a software package for carrying out similar tests of any land vehicles.
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