Кочкарьов, Д. В. та Азізов, Т. Н. (2024) РОЗРАХУНОК НА ПРОБИТТЯ УЛАМКАМИ ОГОРОДЖУВАЛЬНИХ КОНСТРУКЦІЙ ЗАХИСНИХ СПОРУД. Вісник Національного університету водного господарства та природокористування (3(107)). с. 160-168.

Text Vt3202416.pdf Download(213kB)

Анотація

У статті розглянуто сучасні методики розрахунку на пробиття уламками огороджувальних конструкцій захисних споруд. Проведено огляд літературних джерел та передумов розрахунку огороджувальних конструкцій захисних споруд на пробиття уламками. Розглянуто феноменологічні підходи до розрахунку на пробиття уламками огороджувальних конструкцій захисних споруд. Показано можливість проведення спрощених розрахунків на пробиття, а також наведено наближені параметри основних розрахункових формул. Наведено методику чинних норм проєктування та вказано на основні її передумови використання. Розглянуто порядок розрахунку на пробиття уламками за чинними нормами проєктування.

Title in English

CALCULATION OF FRAGMENT PENETRATION OF PROTECTIVE STRUCTURES’ ENCLOSING ELEMENTS

English abstract

The main phenomenological approaches to calculating the penetration of protective structures by fragments have been reviewed. It is worth noting that the most accurate calculations, which align with the physical understanding of material behavior during penetration, correspond to the main methods based on solid mechanics. Such methods are implemented in many software packages and are not discussed in detail in this article. The article presents the main premises of the phenomenological approaches for these calculations. It examines both underground and above-ground placement of protective structures and highlights the specifics of calculating the penetration of their enclosing structures by fragments. Generally, the thickness of the enclosing structure of a protective facility depends on parameters such as the mass of the fragment, the shape of the fragment, the speed of the fragment as it approaches the protective layer, the effective diameter of the fragment, and the parameters of the protective layer. The procedure for calculating the penetration of enclosing structures using the given methods is presented. This calculation procedure allows verifying the sufficiency of the thickness of the layers in the enclosing structures of protective facilities. The article discusses the calculation methodology outlined in current design standards. The essence of this methodology involves reducing various layers of the protective thickness of enclosing structures to a single- layer structure made of concrete of class C20/25. The thickness of this single-layer structure is established through comprehensive calculations using various phenomenological approaches for the most powerful munitions. The reduction of different layers of protective thickness to a single-layer structure is carried out using an equivalent coefficient of material susceptibility to penetration for the respective protective layer. The thickness of the elements is determined in the direction of the most unfavorable possible fragment impact. This approach significantly simplifies the calculation of fragment penetration of protective structures and allows for the verification of design decisions. Its use does not require determining the parameters of the munitions, which are usually unknown. However, it is important to note its approximate and conditional nature. Recommendations are provided for the simplified determination of necessary parameters for various types of munitions, and the procedure for calculating enclosing structures using the simplified methodology of current design standards is outlined.

Перегляд елементу

Завантажень