Wyniki wyszukiwania - BazTech

1

The theory of vibrating excavation of root crops of a sugar beet

Bulgakov V.

Autobusy : technika, eksploatacja, systemy transportowe

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2012

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R. 13, nr 10

33-37

EN

New mathematical model which describes process of direct withdrawal beet of a root crop of a ground which is carried out under the action of vertical troubling forces and traction effort which are given to it by vibrating of digging up working body is constructed. The received systems of the differential equations, which decisions have enabled to find the law of movement of a root crop during its direct vibrating withdrawal.

PL

Nowy model matematyczny opisujący proces bezpośredniej ekstrakcji buraków wyorywania ziemi, przeprowadzone w ramach działania pionowego odrażającego życie i wysiłek trakcyjnej, które zostaną przeniesione tutaj wibrujące wykopywanie ciało działa jest skonstruowany. Układy równań różniczkowych, które decyzja pozwoliła zdefiniować prawo przepływu upraw korzeni podczas bezpośredniego poboru wibracyjnej są odbierane.

2

Effect of rotation on surface wave propagation in a elastic layer lying over a thermodiffusive elastic half-space having imperfect boundary

Kumar R., Chawla V.

International Journal of Applied Mechanics and Engineering

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2011

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Vol. 16, no 1

37-55

EN

The present investigation deals with the propagation of surface waves at an imperfect boundary between an isotropic elastic layer of finite thickness and a homogenous isotropic thermodiffusive elastic half- space with rotation in the context of generalized theory of thermoelastic diffusion. Lord and Shulman (L-S) theory in which thermal and thermo-mechanical relaxation time is governed by time constant and diffusion relaxation time is governed by other different time constants is selected for the study. The secular equation for surface waves in a compact form is derivied after developing the mathematical model. The phase velocity and attenuation coefficient are obtained for stiffness and then deduced for normal stiffness, tangential stiffness and welded contact. The dispersion curves for these quantities are illustrated to depict the effect of stiffness and thermal relaxation times. The amplitudes of displacements, temperature and concentration are computed at the free plane boundary and depicted graphically. Specific loss of energy is obtained and presented graphically. The effects of rotation are shown for phase velocity, attenuation coefficient and amplitudes of displacements, temperature change and concentration. Some special cases of interest are also deduced and compared with known results.

3

Wykorzystanie uśrednionej, normalizowanej charakterystyki częstotliwościowej trasy do rekonstrukcji kompletnego zapisu sejsmicznego

Jędrzejowska-Tyczkowska H., Żukowska K.

Prace Instytutu Górnictwa Naftowego i Gazownictwa

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2002

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nr 116 wyd. konferencyjne

173--176

PL

W pracy przedstawiono sposób uzupełniania rejestracji sejsmicznych na drodze spektrum częstotliwościowego.

EN

The purpose of presented publication is to show how the direct and inverse Fourier transform can be used to complete zero amplitudes intervals of seismic time section.