Results 11 to 20 of about 178 (131)

Study on Stability of Transmission Tower-Line System under a Downburst

Buildings, 2022
A downburst is one of the high-intensity winds that cause transmission tower failures. In recent years, downbursts have brought great disasters to the economies and lives of people all around the world.
Yongli Zhong, Shun Li, Zhitao Yan, Xinpeng Liu, Jun Luo, Weichen Jin   +5 more
doaj   +1 more source

Investigating the impact of atmospheric stability on thunderstorm outflow winds and turbulence [PDF]

Wind Energy Science, 2018
Downburst events initialized at various hours during the evening transition (ET) period are simulated to determine the effects of ambient stability on the outflow of downburst winds.
P. Hawbecker, S. Basu, L. Manuel
doaj   +1 more source

Semiempirical Models of Speedup Effect for Downburst Wind Field over 3-D Hills

Atmosphere, 2023
Downbursts occur frequently in mountainous regions, such as the southwest of China, and causing extensive damage to engineering structures. While some researchers have developed semiempirical models for the speedup effect, most are based on the wind ...
Bowen Yan, Yini He, Chenyan Ma, Xu Cheng
doaj   +1 more source

Preliminary study on the causes of a downburst event in Tianjin in the summer of 2017

暴雨灾害, 2022
A severe thunderstorm gale event with several short-term rainfall,hail and downburst occurred in the southwest of Tianjin on 9 July 2017, during which two downbursts attacked successively Duliu Town,Jinghai District,Tianjin.
Yanchun WANG, Yinghua WEI, Nan ZHANG, Minna SUN, Xiaomeng LIN   +4 more
doaj   +1 more source

Characteristic Analysis of the Downburst in Greely, Colorado on 30 July 2017 Using WPEA Method and X-Band Radar Observations

Atmosphere, 2018
As a manifestation of low-altitude wind shear, a downburst is a localized, strong downdraft that can lead to disastrous wind on the ground surface.
Hao Wang, Venkatachalam Chandrasekar, Jianxin He, Zhao Shi, Lijuan Wang   +4 more
doaj   +1 more source

Numerical Simulation of Characteristics of Wind Field at Bridge Sites in Flat and Gorge Terrains under the Thunderstorm Downburst

Shock and Vibration, 2021
To investigate the effects of thunderstorm downburst on the characteristics of wind field at bridge sites in flat and gorge terrains, firstly, numerical simulation of wind fields in the flat terrain under the thunderstorm downburst was conducted through ...
Peng Hu, Yilin Chen, Yan Han, Fei Zhang, Yongjian Tang   +4 more
doaj   +1 more source

Evaluation of Peak Transmission Line Conductor Reactions Under Downburst Winds Using Optimization and Simplified Approaches

Frontiers in Built Environment, 2019
Transmission line structures, though designed per code provisions, have suffered several failures worldwide in the past. As reported in the body of the available literature, more than 80% of those failures are due to severe localized wind events such as ...
Atieh Al-Issa, Ayman M. El Ansary, Ayman M. El Ansary, Haitham Aboshosha, Moustafa Aboutabikh, Tarek Ghazal   +5 more
doaj   +1 more source

Frequency Domain Analysis of Alongwind Response and Study of Wind Loads for Transmission Tower Subjected to Downbursts

Buildings, 2022
Downburst is one of the high-intensity winds that cause transmission tower failures. The regulations of transmission tower-line systems under downburst wind loads cannot meet the design requirements at present.
Yongli Zhong, Shun Li, Weichen Jin, Zhitao Yan, Xinpeng Liu, Yan Li   +5 more
doaj   +1 more source

Numerical Study of the Flow Characteristics of Downburst-like Wind over the 3D Hill Using Different Turbulence Models

Applied Sciences, 2023
With the rapid development of computational fluid dynamics (CFD) technology, it has been widely used to study the wind field characteristics of downbursts in mountainous areas.
Bowen Yan, Ruifang Shen, Chenyan Ma, Xu Cheng, Guoqing Huang, Zhitao Yan, Xiao Li, Zhigang Zhang   +7 more
doaj   +1 more source

Oklahoma Downbursts and Their Asymmetry

Journal of Climate and Applied Meteorology, 1987
Abstract Doppler radar data collected each spring in 1979–1984 with the two Doppler radars operated by the National Severe Storms Laboratory (NSSL) are used to investigate the asymmetry of low-altitude divergent outflows of convective storm downbursts in central Oklahoma.
Michael D. Eilts, Richard J. Doviak
openaire   +2 more sources