http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A boundary element scheme for problems of framed structures subjected to seismic and moving loads
I. I. Ivanchenko 한국도시철도학회 2014 IJAR Vol.2 No.2
The purpose of this study is to formulate the equation of dynamic interaction between trains and bridges using three dimensional models and to consider the dynamic response resulting from the vehicles and seismic loads. A vehicle model and bridge model were used to study interaction between a steel truss bridge and a moving high speed train. The proposed method a simulation program BRIDGE-3 allows to investigate stress-deformation state of elements of the bridge structure under action of the seismic, moving and wind loadings
Thermal ageing and short-range ordering of Alloy 690 between 350 and 550 °C
Mouginot, Roman,Sarikka, Teemu,Heikkilä,, Mikko,Ivanchenko, Mykola,Ehrnsté,n, Ulla,Kim, Young Suk,Kim, Sung Soo,Hä,nninen, Hannu Elsevier 2017 Journal of nuclear materials Vol.485 No.-
<P><B>Abstract</B></P> <P>Thermal ageing of Alloy 690 triggers an intergranular (IG) carbide precipitation and is known to promote an ordering reaction causing lattice contraction. It may affect the long-term primary water stress corrosion cracking (PWSCC) resistance of pressurized water reactor (PWR) components. Four conditions of Alloy 690 (solution annealed, cold-rolled and/or heat-treated) were aged between 350 and 550 °C for 10 000 h and characterized. Although no direct observation of ordering was made, variations in hardness and lattice parameter were attributed to the formation of short-range ordering (SRO) in all conditions with a peak level at 420 °C, consistent with the literature. Prior heat treatment induced ordering before thermal ageing. At higher temperatures, stress relaxation, recrystallization and α-Cr precipitation were observed in the cold-worked samples, while a disordering reaction was inferred in all samples based on a decrease in hardness. IG precipitation of M<SUB>23</SUB>C<SUB>6</SUB> carbides increased with increasing ageing temperature in all conditions, as well as diffusion-induced grain boundary migration (DIGM).</P> <P><B>Highlights</B></P> <P> <UL> <LI> SRO was suggested in Alloy 690 with 9.18 wt% Fe after thermal ageing at 350, 420 and 475 °C. </LI> <LI> Prior thermal treatment promoted SRO before ageing. </LI> <LI> Cold work led to recrystallization and precipitation of α-Cr upon ageing at 550 °C. </LI> <LI> Thermal ageing promoted IG precipitation of Cr-rich M<SUB>23</SUB>C<SUB>6</SUB> carbides and DIGM. </LI> </UL> </P>
Quantum jumps on Anderson attractors
Yusipov, I. I.,Laptyeva, T. V.,Ivanchenko, M. V. American Physical Society 2018 Physical Review B Vol.97 No.2
<P>In a closed single-particle quantum system, spatial disorder induces Anderson localization of eigenstates and halts wave propagation. The phenomenon is vulnerable to interaction with environment and decoherence that is believed to restore normal diffusion. We demonstrate that for a class of experimentally feasible non-Hermitian dissipators, which admit signatures of localization in asymptotic states, quantum particle opts between diffusive and ballistic regimes, depending on the phase parameter of dissipators, with sticking about localization centers. In a diffusive regime, statistics of quantum jumps is non-Poissonian and has a power-law interval, a footprint of intermittent locking in Anderson modes. Ballistic propagation reflects dispersion of an ordered lattice and introduces the second timescale for jumps, resulting in non-nonmonotonous probability distribution. Hermitian dephasing dissipation makes localization features vanish, and Poissonian jump statistics along with normal diffusion are recovered.</P>