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NUMERICAL SIMULATION OF TEMPERATURE FIELD ON FLASH BUTT WELDING FOR HIGH MANGANESE STEELS

Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 547-551页

作者： B.D. Yu W.D. Song F. C. Zhang china railway shanhaiguan bridge group limited company Shanhaiguan 066205 China College of Materials Science and Engineering Yanshan University Qinhuangdao 066004 China

An axial symmetry finite element model coupled with electricity-thermal effect was developed to study the temperature field distribution in process of the flash butt welding （FBW） of frog highmanganese steel. The influence of temperature dependent material properties and the contact resistance were taken into account in FEM ＇simulation. Meanwhile, the lost materials due to .splutter was resolved by using birth and death element. The result of analyzing data shows that the moddel in the FBW flashing is reasonable and feasible, and can exactly simulate the temperature field distribution. The modeling provides reference for analysis of welding technologies on the temperature field of high-manganese steel in FBW.

关键词： flash butt welding (FBW) numerical simulation high manganese steel,temperature field

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Construction management and technical innovation of the main project of Hong Kong–Zhuhai–Macao bridge

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Frontiers of Engineering Management 2018年第1期5卷 128-132页

作者： Yongling ZHU Jinwen ZHANG Xinglin GAO Hong Kong Zhuhai Macao bridge Authority zhuhai 519060 China

Design Units： CCCC Highway Consultants Co., Ltd.; china Zhongtie Major bridge Reconnaissance ＆ Design Institute Co., Ltd. Construction Units： china Communications Construction company limited Consortium; china railway shanhaiguan bridge group Co., Ltd.; Wuhan Heavy Engineering Co., Ltd.; CCCC First Harbor Engineering company Ltd. Consortium; Guangdong Changda High- way Engineering Co., Ltd.; china ZhongTie Major bridge Engineering group Co., Ltd. Consortium; Chongqing Zhixiang Paving Technology Engineering Co., Ltd.; Hunan Construction Engineering group; china railway Electrification Bureau group Co., Ltd. Consortium

关键词： Construction management technical innovation of the main project of Hong Kong-Zhuhai-Macao bridge

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Microseismic monitoring and forecasting of dynamic disasters in underground hydropower projects in southwest china:A review

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第8期15卷 2158-2177页

作者： Biao Li Nuwen Xu Peiwei Xiao Yong Xia Xiang Zhou Gongkai Gu Xingguo Yang School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China Power china Chengdu Engineering Co. LtdChengdu610072China Chn Energy Dadu River Hydropower Development Co. LtdChengdu610041China china Three Gorges Construction Engineering Corporation Chengdu610095China

The underground hydropower projects in Southwest china is characterized by large excavation sizes,high geostresses,complicated geological conditions and multiple construction *** disasters such as collapses,large deformations,rockbursts are frequently encountered,resulting in serious casualties and huge economic *** review mainly presents some representative results on microseismic(MS)monitoring and forecasting for disasters in hydropower underground ***,a set of new denoising,spectral analysis,and location methods were developed for better identification and location of MS ***,the tempo-spatial characteristics of MS events were analyzed to understand the relationship between field construction and damages of surrounding *** with field construction,geological data,numerical simulation and parametric analysis of MS sources,the focal mechanism of MS events was revealed.A damage constitutive model considering MS fracturing size was put forward and feedback analysis considering the MS damage of underground surrounding rocks was ***,an MS multi-parameter based risk assessment and early warning method for dynamic disasters were *** technology for control of the damage and deformation of underground surrounding rocks was proposed for underground ***,two typical underground powerhouses were selected as case *** achievements can provide significant references for prevention and control of dynamic disasters for underground engineering with similar complicated geological conditions.

关键词： MS monitoring Forecasting method Control technology Dynamic disaster Underground engineering

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