Assessment of vehicle damage from the point of a complex technical system with its own structure

There is considered a part of the study of post-repair reliability of vehicles from the point of a complex technical system in the form of an algorithm for evaluating diagnostic parameters (probable connections). The problem of the reliability of vehicles in operation is legally put under the control of the President of the Russian Federation and is included in the strategy for ensuring road safety until 2023, which is part of the National Project “Safe Roads”.

The initial data of the study at the stage of evaluating probable connections are the parameters of the vehicle movement in the pre-accident time interval and the voltage acting at the contact point of the object, which is obtained based on these parameters. The main method of assessment is the calculation of cells of different types using the grid method, depending on the nature of the damage to the vehicle. In order to decompose the contact point into cells of different types, it is recommended to use appropriate certified measuring instruments and certified equipment: flaw detectors and so on. For the convenience of using the algorithm and reducing the error of using the given mathematical model in a comprehensive assessment of the reliability of vehicles, the article provides a definition of the reduced volume and correction coefficients.

The output data of the algorithm for evaluating diagnostic parameters are the updated values of stresses at the contact point of the object under study, as well as a detailed picture of the distribution of strain energy in the object. As a result, the obtained values can be used for further evaluation of changes in the regulated values of the vehicle properties established by the manufacturer and controlled within the framework of the failure prevention system or technical inspection.