On the two-dimensional steady Navier-Stokes equations related to flows around a rotating obstacle (Workshop on the Boltzmann Equation, Microlocal Analysis and Related Topics)

"Workshop on the Boltzmann Equation, Microlocal Analysis and Related Topics". May 27～29, 2016. edited by Hisashi Okamoto, Yoshio Tsutsumi, Naomasa Ueki, Tadayoshi Adachi and Senjo Shimizu. The papers presented in this volume of RIMS Kôkyûroku Bessatsu are in final form and refereed.We study a model problem related to the two-dimensional stationary Navier-Stokes equations with a rotating effect, which naturally appears in the analysis of the flows around a rotating obstacle. The unique existence of solutions and their asymptotic behavior at spatial infinity are established when the given external force is sufficiently small in a scale critical space

Tensile Properties of Optical Fiber Irradiated by Low Voltage Electron Beam Homogeneously

Homogeneous low voltage electron beam irradiation (HLEBI) with small dose of 0.30 to 1.17 MGy enhanced the elasticity indicated by the initial and maximum slope values of stressstrain curves ((d·/d¾) i and (d·/d¾) max ) of 250 µm diameter optical fiber (OF), which was constructed with both core (10 µm diameter) and clad (125 µm diameter) silica glasses covered with acryl-urethane sheath (62.5 µm thickness). The highest (d·/d¾) i and (d·/d¾) max values of 5.3 and 5.9 GPa, which were about 10 and 20% higher than those (4.8 and 4.9 GPa) before irradiation, were found at 0.104 MGy, respectively. Moreover, remarkable effects of HLEBI of 0.65 MGy on both tensile strength (· f ) and fracture strain (¾ f ) of OF were obtained at each fracture probability (P f ) value. Since HLEBI also enhanced the density of dangling bonds of each material of OF, effects of compressive stress on pull-out resistance and elasticity enhancements of fiber and sheath probably occurred. Thus, 0.64 MGy-HLEBI enhanced the (d·/d¾) i and (d·/d¾) max as well as ¾ f , resulting in enhancement of · f of OF

The Stress Distribution of a Transmission Tower Affected by Unbalanced Tension of Conductors under Strong Winds

Unbalanced tension load is defined as a load directed along the conductor, and its load scale greatly varies according to the conductor\u27s supporting system, the span length between the towers, and the conductor\u27s horizontal and vertical angle against the tower. Unbalanced tension load is an important factor which should be considered when designing Japanese transmission towers, which are typically constructed in mountainous areas. We then carried out non-linear stress analysis for wind loads on a transmission tower, assembled a record of strong winds resulting from recent typhoons that passed through Kyushu. As a result, it was revealed that a large unbalanced tension load was applied to the line; therefore, we studied to find an appropriate countermeasure for it

送電線支持部材の応力分布に及ぼす強風時電線不平均張力荷重の影響

Unbalanced tension load is defined as a load directed along the conductor, and its load scale greatly varies according to the conductor's supporting system, the span length between the towers, and the conductor's horizontal and vertical angle against the tower. Unbalanced tension load is an important factor which should be considered when designing Japanese transmission towers, which are typically constructed in mountainous areas. We then carried out non-linear stress analysis for wind loads on a transmission tower, assembled a record of strong winds resulting from recent typhoons that passed through Kyushu. As a result, it was revealed that a large unbalanced tension load was applied to the line; therefore, we studied to find an appropriate countermeasure for it