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Влияние прочностных свойств грунтово-скальной преграды на глубину проникания ударников…

ISSN 0236-3941. Вестник МГТУ им. Н.Э. Баумана. Сер. Машиностроение. 2016. № 4

53

Федоров Сергей Владимирович

— старший преподаватель кафедры «Высокоточные

летательные аппараты» МГТУ им. Н.Э. Баумана (Российская Федерация, 105005,

Москва, 2-я Бауманская ул., д. 5).

Федорова Наталия Александровна

— студентка 5-го курса кафедры «Высокоточные

летательные аппараты» МГТУ им. Н.Э. Баумана (Российская Федерация, 105005,

Москва, 2-я Бауманская ул., д. 5).

Просьба ссылаться на эту статью следующим образом:

Федоров С.В., Федорова Н.А. Влияние прочностных свойств грунтово-скальной преграды

на глубину проникания ударников при дополнительном действии импульса реактивной

силы // Вестник МГТУ им. Н.Э. Баумана. Сер. Машиностроение. 2016. № 4. C. 40–56.

DOI: 10.18698/0236-3941-2016-4-40-56

INFLUENCE OF THE SOIL AND ROCKY TARGET STRENGTH PROPERTIES

ON PROJECTILES PENETRATION DEPTH WITH ADDITIONAL ACTION

OF THE JET THRUST IMPULSE

S.V. Fedorov

sergfed-64@mail.ru

N.A. Fedorova

n2402f@live.ru

Bauman Moscow State Technical University, Moscow, Russian Federation

Abstract

Keywords

The purpose of this work was to analyze the influence of

additional jet thrust impulse enclosed to the projectile in the

course of its movement in a target on a possible increment

of penetration depth into soil and rocky targets with various

strength properties. The analysis was performed by the

calculation method. We defined the dynamics of projectile

penetration within the model of a non-deformable body of

variable weight moving under the target resistance force and

jet force (in operating time of the jet engine). We calculated

soil and rocky target resistance force using the empirical

resistance law which establishes the dependence of mechani-

cal tension on a contact surface of the projectile head part for

the target on the projectile velocity. We considered penetra-

tion into such targets as dense soil, low-strength rock and

high-strength rock at initial interaction velocities in the range

from 250 to 1000 m/s. Consequently, for soil and rocky tar-

gets with various strength properties we defined the begin-

ning time and duration of the jet impulse action considering

the most possible increment of penetration depth. In many

cases the greatest increase in penetration depth is reached not

at preliminary (prior to interaction with a target) operation of

the jet engine, but during its work already in the course of the

projectile movement in a target. For projectile velocity of

500 m/s and mass of solid rocket propellant charge making

20 % of the projectile mass, additional action of the jet thrust

impulse allows for the increase in penetration depth appro-

High-velocity penetration, non-

deformable projectile, soil and

rocky target, strength properties,

penetration depth, jet impulse,

Tsiolkovsky number