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Engineering Bulletin # 11, November 2014
УДК: 539.3; 539.4.019.1; 620.17
Influence of jet thrust on penetrator penetration when studying the structure of space object blanket
Engineering Education # 02, February 2014
DOI: 10.7463/0214.0699035
The paper presents calculations to determine a penetration depth into low-strength soil targets provided by penetrators equipped with the pulse jet engine when studying a structure of space object blanket. In movement the penetrator is considered as a rigid body of variable mass, which is subjected to the drag force and the reactive one applied at the moment the jet engine fires. Dynamics of moving penetrator with its conic nose part is described with binomial empirical law of target drag force and with assumption that the jet thrust force is constant during its application time. It is established that penetration depth into low-strength soil target can be several times increased owing to use of the jet engine. A rational time for the jet engine firing and operation is defined.
Application of accelerometry for research of dynamic mechanical properties of materials in complicated environments of measuring
Engineering Education # 08, August 2012
DOI: 10.7463/0812.0428828
The authors carried out experimental studies aimed at development of variants of systems of continuous electric communication with the accelerometer under the conditions of application of terminal ballistics accelerometry (TBA-technology) to impact of a rigid body at an angle to the surface of the medium under test. A particular case of TBA-technology was tested under laboratory conditions for the case of inclined impact of soil medium along with defending screens. The algorithm of retrieving data on dynamic mechanical properties of soil medium using registrations of deceleration history of a rigid projectile during the penetration process into the medium under test was debugged. The developed technology is suitable for obtaining data on dynamic mechanical properties of soil medium in the range of sub-sound impact velocities.
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