Abstract
The paper deals with the problem of assessing the characteristics of a vehicle body on the example of a car body. Such systems allow not only to reduce the cost of design, but also to obtain a number of important estimates that are not available at the stage of full-scale tests. An assessment system based on a virtual platform and a digital twin is considered. It is shown that the acceptable accuracy of the estimates is provided by the sufficient accuracy of the mathematical model. Considerations on approaches to designing the structure of such software systems are presented. The problems of modeling and evaluation based on the digital twin of the designed product are considered. The relationship between the model, on the basis of which it is supposed to evaluate the characteristics, and the models of adjacent vehicle systems, requiring a similar approach based on a digital virtual platform, is considered. Attention is paid to the main estimated parameters of the model and limitations.
Highlights
It has become possible to use digital twins to define the characteristics of the vehicle body
Digital twins are a computer model that is built on the basis of a mathematical model that reflects the features of the object being created that are of interest to the designer or tester
In the digital twin of a car, developed at the Center of National Technological Initiative (NTI, Polytechnic University), it became possible to estimate the optimal parameters of energy storage units’ location and their interaction with the car body in crash tests. All these considerations must be taken into account when designing virtual test benches, and this leads to the need to develop many complex mathematical and computer models
Summary
It has become possible to use digital twins to define the characteristics of the vehicle body. Digital twins are a computer model that is built on the basis of a mathematical model that reflects the features of the object being created that are of interest to the designer or tester Such mathematical models should be provided with the appropriate means of numerical calculations, so that they can be used to obtain adequate evaluation results. If one equip the digital twin with additional optimization algorithms [4], additional benefits of using virtual test bench and digital platforms can be obtained. These are, for example, methods for topological optimization of the body structure [5], methods for optimizing the distribution of stiffeners, and, methods for creating lightweight structures without losing rigidity and strength
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