Wyniki wyszukiwania - BazTech

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Palnik pirotechniczny do niszczenia min niemetalowych

Gołofit T., Maksimowski P., Obrębski S.

Przemysł Chemiczny

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2015

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T. 94, nr 4

546-549

PL

Przeprowadzono badania nad palnikami pirotechnicznymi, które mogą znaleźć zastosowanie do utylizacji min przez wypalenie zaelaborowanego materiału wybuchowego. Opracowane palniki pirotechniczne pozwalają na perforowanie płyt z polietylenu i poli(chlorku winylu) o grubości 5–6 mm oraz stali o grubości 2 mm. Produkty reakcji rozdmuchują również warstwę piasku o grubości 5 cm. Przeprowadzone próby na surogatach min potwierdziły przydatność opracowanych palników.

EN

Two pyrotechnic torches were constructed and used for burning out explosive material inside land mines. The torches were charged either with a mixt. of KClO₄, Al and shellac or with a mixt. of gypsum, fine Al powder and H₂O. The torches penetrated polyethylene and poly(vinyl chloride) plates (5–6 mm thick) and steel plates (up to 2 mm thick). The gas products blowed away a 5 cm thick sand layer and burned out the explosive materials from a mine dummy.

2

The modelling of transfer influence vehicle from ground surface on objects in placed

Kuczmarski F., Bartnicki A., Sprawka P.

Journal of KONES

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2007

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Vol. 14, No. 1

245-253

EN

This paper describes the initial model of the load-mine-ground relation and presents the preliminary results of a computer simulation. Pressure mine-clearing devices, with discs loosely embedded on the axis of the minesweeping section, (disc mine-clearing devices) cause deformation to the mine 's firing mechanism, which, through the actuation of the fuse, leads to the detonation of the inner-placed explosive. It is assumed that under the load of a mine clearing vehicle, the active part of the mine's cover will be vertically displaced by 6-10 [mm] actuating the fuse of the mine. Although the construction parameters of pressure mine-clearing devices are known, there is a shortage of instructions and data requisite for proper construction and effectiveness examination of dynamic mine-clearing vehicles. In fact, during mine clearing with a dynamic mine-clearing device, the force exerted upon the mine (Ngr) is that of the pressure by the disc (an element of the device). This force differs from a static load and the differences result from the following factors: mine placement type of soil as well as its physical and mechanical properties construction properties of a mine-clearing device pace of mine clearing The issue of influence transferred from the surface of the ground onto the mine placed inside is not present in literature and it constitutes an interesting and important scientific issue in terms of selecting parameters for dynamic minesweeping devices. Similarly to a static load, shock waves propagating within the ground cause its volumetric and structural deformations. The main cause of the differences lies in the briefness of a dynamic load. The gradual growth of static loads (clenching) causes displacement of air and water in the pores and their partial squeezing out. In the case of a static load applied to sandy soils, the process lasts from a few minutes to a few hours, whereas in the case of clay and loessial ones, it extends to a few days, weeks or, sometimes, even months. Under static and dynamic loads, the ground reacts similarly to a three-component centre with a changing-with-time amount of air and water. The action time of a percussive load extends from a few to between ten and twenty milliseconds. Due to air and water inertia, this is too short a period of time to squeeze them out of the pores of the soil, which reacts in a way similar to a three-component centre with a constant amount of air and water. Since in unhydrated soils the main part of the pores' volume consists of air, both static and dynamic loads are accompanied by the absorption of the main stresses by the skeleton. With static loads exerted upon the hydrated soil, both water and air flow loosely out of the pores without the absorption of the loads. In terms of strength the only working element here is the ground's skeleton. In the case of short-lasting, intense loads, water (with a small amount of trapped air) will not flow out simultaneously with the skeleton and, as in the case of mean pressures, it may absorb the load to a larger extent than the skeleton itself. The way the hydrated ground reacts to low pressures - below 1 MPa - is therefore largely determined by the amount of air in the pores. Therefore, the ground with a mine placed inside is a multiphase center with changeable properties - the semi-limited area with mechanical properties changing with each cycle of dynamic influence put upon its surface. Although the issue of the ground pressure measurement is dealt with in various publications, there is a lack of data concerning how it changes under the mechanical influence of moving vehicles and under that of dynamic minesweeping devices - the problem which is essential for a safe minefield crossing. The effectiveness of percussive minesweeping devices can be evaluated upon the basis of the experimental data obtained by means of measuring equipment. The elaboration of a reliable ground-mine relation model for short-time (percussive) influences transferred to the ground surface should accelerate the process of selecting parameters for dynamic mine clearing in terms of obtaining the maximum destructive impact, either directly upon the mine or through the actuation of its firing mechanisms for various types of mines, different depths at which they are buried as well as for various soils with their different properties. The above task is the aim of further works focusing on the subject presented in this paper.

3

Działania niszczycieli min

Głębocki J., Kurpiel S., Szady J.

Zeszyty Naukowe Akademii Marynarki Wojennej

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2006

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R. 47 nr 1 (164)

53-67

PL

W artykule omówiono poszczególne etapy działań przeciwminowych niszczycieli min. Zwrócono uwagę na różnice występujące w działaniach sił narodowych. Wskazano na konieczność określenia wskaźników wykrywania dla przeciwminowych sonarów okrętowych.

EN

The paper discusses stages of MCM activities carried out by minehunters. It focus attention on differences which occur during international operations. It also points out to the necessity to determine factors used for detecting anti-mine shipboard sonars.

4

Zagrożenie minowe w Afganistanie

Kośnik S.

Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki

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2005

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Nr 4

39--46

PL

Artykuł został napisany na podstawie rocznego doświadczenia autora w Afganistanie, gdzie pełnił obowiązki oficera operacyjnego Polskiego Kontyngentu Wojskowego (PKW). Zajmował się planowaniem i organizowaniem oraz nadzorował działania polskich saperów w oczyszczaniu z przedmiotów wybuchowych i niebezpiecznych bazy sił koalicji antyterrorystycznej w Bagram. Polscy saperzy brali także udział w działaniach poza bazą, neutralizując na terenie Afganistanu środki bojowe oraz niewybuchy i niewypały.

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Experimental verification of thermal signature model for mines buried in the sand

Świderski W., Szabra D., Pręgowski P., Lamorski K., Usowicz B., Walczak R.

Problemy Techniki Uzbrojenia

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2000

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R. 29, z. 72

61--72

EN

Selected results of research works for using infrared thermography for buried mines detection are presented in the paper. Developed numerical model describing heat and water transfer phenomenon in the soil has been verified by laboratory experiment.