Galloping of ice-coated transmission lines is occasionally observed under oblique wind directions. However, most current investigations on the galloping mechanisms are for flow perpendicular to span lines. In order address this gap, research studies characteristics flows based tunnel tests. The wind-induced displacement an aero-elastic iced-coated line model was measured with a noncontact measurement equipment in at different speeds and results show that characterized by elliptical...

Transmission towers are prone to collapse under strong wind load, resulting in significant economic losses. In order investigate the mechanism and failure modes of transmission tower load whether vibration factor can greatly reflect increasing effect fluctuating wind, finite element method (FEM) is utilized analyze ultimate bearing capacity a typical 220 kV tower. The results show that loads usually due buckling leg members. When reference speed equal 27 m/s, small part main members reaches...

Method of support vector machine (SVM) as a new learning algorithm has shown its superiority the ability regression in fields damage identification. Through setting variation displacement mode shape to feature parameters identification, method identification long-span cable-stayed bridge based on SVM is presented. The least square used extent and results this which are very close target obtained under condition small sample. To compare with from BP neural network, precision paper verified.

Mg-containing high-silicon aluminum alloy is a heat-treatable that now widely used in the aerospace and automotive industries because of its high specific strength, wear resistance corrosion resistance, low thermal expansion coefficient, cost. More attention has been paid to optimizing microstructure increase performance this type alloy. In present work, solidification processes Mg-free (0.33–1.32%) Al-8Si alloys were analyzed by experimental results combined with thermodynamic calculation....

The error in calculating a reservoir saturation caused by the cementation exponent, m, and n, should be analysed. In addition, influence of m n on discussed. Based Archie formula, effect variables is analysed, while formula for saturation, deduced, main factors affecting are illustrated. According to physical meaning it can interpreted that they two independent parameters, i.e., there no connection between n. When have same error, impact calculation compared. Therefore, when errors...

To investigate the variation law of wind-resistant performance transmission towers during their operation, this paper proposes an evaluation method for wind resistance tower considering corrosion, and a 220-kV is analyzed as example. Considering uncertainty material geometric parameters, wind-induced collapse was analyzed, speeds were obtained via pushover incremental dynamic analyses. In addition, sensitivity to various parameters analyzed. Based on existing meteorological corrosion data,...

Transmission tower occupies an important position in the event of transmission electricity. The failure would cause serious economic losses. As a damage identification parameter, variation ratio curvature mode has great ability to location. In field location on tower, achieved good results even condition tiny such as 1%. Support vector machine, new machine learning algorithm, shown its superiority regression fields identification. this paper, method least squares support is applied study...

A pull-apart basin (PAB) is a releasing zone constrained by strike–slip faults. PAB partly appears as unique type typically dominated the sidewall and cross-basin However, structural characteristics of different subsidiary faults derived from motions are currently poorly understood in PABs. Under control bend faults, this study examines formation evolution PABs reconstructed wet clay with high water content (68%) experimental material. It was reported that (1) shows single asymmetric...

With the rapid development of technology and society, all walks life in China are becoming more dependent on power systems. When earthquake occurs, electrical equipment substation is prone to damage because its own structural features, top-heavy, brittleness main body. At same time, due complex coupling soft connection equipment, negative impact can not be estimated. In this paper, finite element model system single unit high voltage with connecting bus established seismic response analysed....

Substation high voltage electrical equipment such as mutual inductor, circuit interrupter, disconnecting switch, etc., has played a key role in maintaining the normal operation of power system. When earthquake disaster, porcelain transformer substation is most easily to damage, causing great economic losses. In this paper, using method numerical analysis, establishment typical three dimensional finite element model, study seismic response SF6 breaker, at same time, analysis and contrast...

Recently, Dynamic Binary Translation (DBT) technology has gained much attentions on embedded systems due to its various capabilities. However, the memory resource in is often limited. This leads overhead of code retranslation and causes significant performance degradation. To reduce this overhead, Heterogeneous Code Cache (HCC), proposed split cache among SPM main avoid re-translation. Although HCC effective handling applications with large working sets, it ignores execution frequencies...

Based on wavelet packet energy and RBF neural network, the damage identification of principle material a long span power transmission tower is presented in this paper. The dynamic response signal displacement-time undamaged subjected to seismic excitation obtained. In addition, curvature difference pre-damage post-damage states by decomposing reconstructing given. By selecting first sixth component energy, single multiple locations are identified accurately. Moreover, network applied extent...

Half-through arch bridge is an important traffic structure, so it extremely valuable to study the damage location questions on condition of suspender damage. Based finite element modal, efficiency variation ratio curvature researched in this paper. As turned out, which a modal parameter, could locate initial position, as well single or multiple detection. After data normalized, still has usability detecting position with 10% noise level. Convenience provided for subsequently accurate extent...

Due to few or a drilled wells in the deepwater area, conventional technologies such as seismic inversion without constraining from logging can generate multiple solutions detecting oil and gas. According wave attenuation velocity dispersion, frequency-dependent AVO equation is used calculate dispersive properties of based on spectrum decomposition. And then through combing frequency dispersion analysis with attributes, we study gas-bearing possibility X21-1 area South China Sea. The...

Due to reclaimed water, irrigation can cause human health and environmental risks. Soil amendments are applied reveal the abundance of pathogens antibiotic resistance genes in rhizosphere soil irrigated by water better understand effects factors on bacterial composition, which has guiding significance for reasonable use amendments. In this study, biochar, bioorganic fertilizer, humic acid, loosening essence, corn vinasse community diversity certain gene abundances under drip with were...