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M. Ahmad E. Nolde A. V. Pichugin 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》2011,166(3):173-181
An explicit asymptotic model for transient Love waves is derived from the exact equations of anti-plane elasticity. The perturbation
procedure relies upon the slow decay of low-frequency Love waves to approximate the displacement field in the substrate by
a power series in the depth coordinate. When appropriate decay conditions are imposed on the series, one obtains a model equation
governing the displacement at the interface between the coating and the substrate. Unusually, the model equation contains
a term with a pseudo-differential operator. This result is confirmed and interpreted by analysing the exact solution obtained
by integral transforms. The performance of the derived model is illustrated by numerical examples 相似文献
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A technology is proposed for making netted rod assemblies with metal joints 3–5 times lighter than existing comparable structures. A procedure was developed for winding assemblies out of carbon-fiber-reinforced plastic (UKN-5000 and binder EKhD-MK). Results are presented from a study of the strain characteristics and load-carrying capacity of assemblies with different reinforcement schemes for different conditions of static damage. It is shown that the design of netted rod assembly proposed here is significantly superior to all known analogs with respect to specific stiffness characteristics and provides great dimensional stability in the case of unilateral heating of the product. The method is most effective if used to develop framework-type structures for use in space — platforms, telescope and antenna supports, and masts.Paper to be presented at the Ninth International Conference on the Mechanics of Composite Materials (Riga, October 1995).Translated from Mekhanika Kompozitnykh Materialov, Vol. 31, No. 3, pp. 387–392, May–June, 1995. 相似文献
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We report a photoelectron imaging study of the [O(N(2)O)(n)](-), 0or=4 (and up to at least n=9) signatures of an O(-) core are predominantly observed. Photofragmentation studies at 355 nm support these results. 相似文献
69.
N. E. Molevich S. Yu. Pichugin D. S. Ryashchikov D. I. Zavershinskii 《Bulletin of the Lebedev Physics Institute》2018,45(9):267-271
The occurrence conditions of the condensation instability in heat-releasing partially ionized plasma in an external magnetic field with an induction vector normal to the direction along which a perturbation occurs are considered. Linear equations describing isobaric perturbation dynamics in the two-liquid plasma model are derived. Using these equations, a dispersion relation for condensation modes is derived and their time increments are calculated for various degrees of plasma ionization and magnetic fields. 相似文献
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G. F. Bin'ko V. N. Grebenev Yu. P. Dobretsov V. G. Kirillov-Ugriumov A. A. Maloletnev A. L. Mikaelyan A. P. Pichugin 《Hyperfine Interactions》1994,91(1):905-910
Negative muon polarization has been measured in pure gaseous Ne (24 atm) and in Ne+H2 mixtures (24 atm Ne+1.8 atm H2, 8 atm H2 and 16 atm H2). The experiment was performed at JINR (Dubna) on aSR-spectrometer [1] with 200 G transverse magnetic field at room temperature. In pure Ne no polarization was observed (a
0=0.09±0.1%) while in Ne+H2 mixtures clear precession signals were detected at the free-muon frequency with asymmetries a1.8=0.33±0.13%,a
8=0.33±0.14% anda
16=0.59±0.09%. The fact that polarization appears in the muonic HF molecule shows that at the moment of the molecule formation (t10–10 s) the muon is not completely depolarized. The estimate of the reaction constantk=(2.3±1.6)×10–11cm3 s–1 agrees with the experimental values obtained by other methods. The result achieved demonstrates that
–
SR-method can be applied for studying fast kinetics processes in the gas phase and in particular for measuring chemical reaction rates of halogen atoms and ions. 相似文献