Article

Received 03.03.2025

Revised 02.05.2025

Accepted 28.06.2025

Retrieved from Vol. 29, No. 1, 2025

Pages 63 -71

Korshak, A. (2025). Analysis of inverse calculation methods for the elastic modulus of aerodrome pavements based on FFWD tests. The National Transport University Bulletin, 29(1), 63-71. https://doi.org/10.33744/2308-6645-2025-1-60-063-071

Analysis of inverse calculation methods for the elastic modulus of aerodrome pavements based on FFWD tests

Alina Korshak

The article presents a comparative analysis of modern methods of inverse calculation of the elastic modulus of airport pavement layers based on data obtained from tests using a Fast Falling Weight Deflectometer (FFWD). 71 The object of the study is inverse calculation methods. The purpose of the work is to analyze modern inverse calculation methods for determining the elastic moduli of airfield pavements based on FFWD test data. Research methods: the following methods were used to achieve the purpose of the work: analysis, synthesis, systematization, generalization, and formulation of conclusions. The main approaches used in engineering practice and scientific research are considered: the classical method of a multilayer elastic system, dynamic numerical modeling using finite or spectral elements, optimization methods, as well as wave methods that take into account the complete time history of deflections. The advantages and disadvantages of each method were analyzed according to the criteria of accuracy of results, dependence on coating defects, the need for initial data, the complexity of calculations, and practical application. Taking dynamic effects into account significantly increases the accuracy of module assessment, but requires complex modeling and detailed initial characteristics. For each method, examples from the literature and the results of their comparison are given. The results obtained can be useful in the design, diagnosis, and monitoring of the technical condition of airfield pavements. Based on the analysis, recommendations are made for selecting the optimal method depending on the specific conditions of the study, the objectives of the diagnosis, and the availability of data. The generalizations allow systematizing the key characteristics of the methods, which will contribute to improving the efficiency of the process of assessing the technical condition of airfield pavements. The research results are important for practical engineering tasks related to the design, operation, and monitoring of airfield infrastructure

airfield pavement; deflectometric testing; inverse calculation; modulus of elasticity; FWD; bearing capacity
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https://doi.org/10.33744/2308-6645-2025-1-60-063-071