Results 251 to 260 of about 2,521,798 (304)

Site Characterization for Mechanical Excavation

1988
Scoble, M. J. (Supervisor)
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Measurement of Cutting Speed of Mechanical Excavator

Applied Mechanics and Materials, 2014
Only when mining at reasonable cutting speed, can a mechanical excavator achieve high efficient and low consumption. The same cutting-angle logarithmic spiral trajectory is initially confirmed for the model of a reasonable excavating trajectory to reduce digging resistance. An analytical expression between hoisting and pushing speed is derived from the
Ya Juan Hou, Ji Sheng Wang, Ai Feng Li, Su He Gao, Guo Qiang Wang   +4 more
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Experimental Studies on Mechanics of Lunar Excavation

Journal of Aerospace Engineering, 1991
One of the first construction operations for building a stationary habitat on the moon or Mars will be excavation of soil. The reasons for this necessity are manyfold and range from the need to protect inflatable habitats against radiation to creating an underground space for building electrical power plants.
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A coupled hydraulic and mechanical system simulation for hydraulic excavators

Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 2019
The hydraulic system of an excavator consists of a central hydraulic power source and multiple actuator circuits. The numerical stiffness of the hydraulic system model, the complex hydraulic circuits of the excavator, and the coupling of the dynamics associated with the hydraulic system and mechanical manipulator have been major barriers to developing ...
Cheol-Gyu Park, Seungjin Yoo, Hyeonsik Ahn, Jooho Kim, Daeyoung Shin   +4 more
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Analysis of Mechanism Elastodynamic Performance in Automatic Excavating Process of Excavating Robot

2023
Liang He, Fen Wang, YaPing Wang, Wei Li, Jiao Ma, Zhenglong Chen, Ganwei Cai   +6 more
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Mechanical excavation in mining and civil industries

International Journal of Mining, Reclamation and Environment, 2014
As the preface to the book states, ‘this book is intended to reflect several years of experience and accumulated knowledge on mechanized excavation, applied especially in mining and construction in...
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Strength analysis for executive mechanism of excavator

2012 3rd International Conference on System Science, Engineering Design and Manufacturing Informatization, 2012
The structural strength of the executive mechanism of excavator directly determines the whole performance, reliability and safety performance of the excavator. This paper aims to the executive mechanism, and establish the simulation model of excavator by using CAD and ANSYS.
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Mechanisms in the Mist: A Media Archaeological Excavation of the Mechanical Theater

2018
Theatrical spectacles of the eighteenth and nineteenth centuries played an important role as models in the formation of media culture. They provided scenographic inspiration for popular touring spectacles like peepshows, puppet shows, and ombres chinoises.
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The Methane Explosions in Mechanized Excavations

1986
During the last few years, parallel to the development of mechanized excavation workings, the methane explosions resulting from the friction between rock and metal surfaces has gained importance. Parameters effecting these type of explosions can be classified in three following groups.
ÖKTEN, Gündüz, YAZICI, Sina
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A Mechanical Device for Drawing Excavation Sections

American Antiquity, 1974
AbstractA mechanical device for making scale drawings of excavation sections is described. In limited testing the machine has shown itself to be capable of substantially reducing the time required for this operation, while increasing the accuracy of the results.
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