Results 1 to 10 of about 3,452,326 (230)

Excavation Face Stability Analysis of EPB Shield in Half-Chamber Tunneling Mode

Chengshi guidao jiaotong yanjiu
［Objective］ In complex geological environments such as soft upper and hard lower or weathered rock layers, during the construction of EPB (earth pressure balance) full chamber tunneling mode, the slag liquid level is too high, the cutterhead generates ...
ZHENG Weigang, ZHANG Tao, WU Xinglin, LI Hailong, ZHANG Hongzhi, CHEN Peng, SHU Jicheng   +6 more
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Deep learning-based prediction method for chamber pressure field in shield machines

Yantu gongcheng xuebao
The chamber pressure is a key factor in the core issues of the stress state of equipment and the stability of tunnel face during shield tunneling. It exhibits significant spatial variability, and its formation and evolution originate from the complex ...
ZHANG Chao 1, 2, 3, ZHU Minxiang 1, LANG Zhixiong 1, CHEN Renpeng 1, 2, 3, , , CHENG Hongzhan 1, 2, 3
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Dynamic characteristics of the recessed chamber within a gas–liquid coaxial injector

Advances in Mechanical Engineering, 2016
In this article, a linear dynamic characteristic model of the recessed chamber in a gas–liquid shear coaxial injector is developed. The gaseous injector flow before the recessed chamber is considered to be steady, and we just investigate the response of ...
Qing-fei Fu, Li-jun Yang
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Research on the Pressure Impact Characteristic of Continuous Rotary Electro-Hydraulic Servo Motor

IEEE Access, 2019
In order to reduce the pressure impact of continuous rotary electro-hydraulic servo motor, ensure the smooth pressure transition during the motor commutation, and improve the control accuracy, a kind of pre-compression chamber structure was proposed. The
Xiaojing Wang, Zhiqi Shen, Shuai Chen, Yuwei Sun   +3 more
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Study on large-scale vortices in chamber floor ports system [PDF]

AIP Advances
The chamber floor ports system is an improved design based on the German pressure chamber. Large-scale vortices within the pressure chamber serve as critical factors affecting system performance. This study establishes a large-scale vortex theory for the
Wei Feng, 冯伟, Chunhang Xie, 谢春航, Peng Wu, 吴澎, Zhihang Liu, 刘智航, Qiulin Li, 李秋林   +9 more
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Design and commissioning of a semi-confined blast chamber

Defence Technology, 2016
This paper presents the design, test and analysis of a scaled cylindrical blast chamber. The blast chamber is a one-fifth dimensional size replica of the full-scale blast chamber (Emily). The blast chamber is semi-confined as one end is open.
I.M. Snyman, F.J. Mostert, W. Grundling
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A Universal Differential Pressure Chamber [PDF]

Scientific American, 1910
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openaire   +1 more source

A new dynamic method for measuring hydrogen partial pressure in molten aluminum alloy [PDF]

China Foundry, 2011
Hydrogen partial pressure is an important parameter to calculate hydrogen concentration levels in molten aluminum alloy. A new dynamic method for measuring hydrogen partial pressure in molten aluminum alloy is studied.
Sun Qian, Li Dayong, Wang Lihua
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Theoretical and experimental studies on the interior ballistic of large UAV ejection based on trifluoromethane phase transition

Scientific Reports
Unmanned aerial vehicles (UAVs) have demonstrated immense value in the military sector. This research proposes the use of Trifluoromethane as a novel cold ejection medium.
Zhaijun Lu, Zhifu Wang, Shujian Yao, Mu Zhong, Kai Liu, Jiaqiang Wang   +5 more
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Analysis on the Lifting Performance of Elliptic-Like Type Progressive Cavity Pump

Shiyou jixie, 2021
In view that the lifting performance of elliptic-like type progressive cavity pump is researched less, a suitable finite element model is established.
Han Daoquan, Zhang Yu, SongYujie, Guo Xiang   +3 more
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