Article 12417

Title of the article

ACCOUNTING OF LOAD RANDOMNESS AND STRENGTH IN CALCULATION OF DESIGN RELIABILITY OF DEFENSE TECHNICAL SYSTEMS FOR SAFE OPERATION 

Authors

Severtsev Nikolay Alekseevich, doctor of technical sciences, professor, head of division of safety and nonlinear analysis, Federal research center «Computer science and control» of RAS (Dorodnitsyn computer center of the Russian Academy of Sciences) (119333, 40 Vavilova street, Moscоw, Russia), safsyst@mail.ru
Zatsarinnyy Aleksandr Alekseevich,  doctor of technical sciences, professor, deputy director on scientific work, Federal research center «Computer science and control» of Russian Academy Of Sciences (FRC CsC RAS) (119333, 40 Vavilova street, Moscоw, Russia) (119333, 40 Vavilova street, Moscоw, Russia), azatsarinny@ipiran.ru

Index UDK

621.37/629.78

DOI

10.21685/2307-4205-2017-4-12

Abstract

To ensure the safe operation of mechanical systems under conditions of randomness of load, the task of evaluating the reliability of structures of complex technical systems is urgent. To solve it, it is necessary to develop a model for calculating the reliability of a random event, which can be represented in the form of a two-place double-indefinite predicate. It is shown that in the case of a one-to-one correspondence between the resistance and the measured parameters, the distribution density of resistivity can be expressed through these parameters. To obtain the law of resistivity distribution, the linearization method or the method of small perturbations is used, the essence of which is to approximate the nonlinear relationship between the resistance and the measured parameters, using a linear statistically equivalent initial dependence. It is shown that under conditions of smallness of random deviations of disturbing parame ters from their mathematical expectatins, the assumption of the normal distribution laws of these deviations is valid. Therefore, the linearization method is especially effective if there is a unique functional dependence between the resistance and the measured parameters. A model is developed for calculating the reliability of a complex technical system, expressed in the form of a random event in the form of a two-place doubleindefinite predicate. Thus, a methodology has been developed for determining the reliability for random loads
and the random resistance of complex technical systems and their elements.

Key words

reliability, randomness, load, resistance, system, event, probability

Download PDF

 

Дата создания: 17.01.2018 09:47
Дата обновления: 24.01.2018 15:08