المنتجات الساخنة
Drilling signals analysis for tricone bit condition monitoring
网页2021年3月1日Axial vibration occurs as a result of bit-rock interactions. Bit bouncing occurs when the WOB lifts the bit off the hole bottom and then the bit drops repeatedly.
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Vortex-induced vibration of flexible riser transporting high-speed
网页2022年10月1日Under the joint action of tangential and axial flow velocity, the motion trajectory of solid particles is spiral-shaped, transforming particles into “rotating
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Advances in Mechanical Engineering 2022, Vol. 14(6) 1–17
网页2022年2月19日Coupled axial-torsional vibration of drill strings, nonlinear dynamical model with three-degree-of-freedom, numerical simulations, bit bounce, stick-slip motion Date
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Modeling of Coupled Axial and Torsional Motions of a Drilling
网页2015年10月28日A bond graph model of a drillstring has been used for simulation that predicts axial vibration, torsional vibration, and coupling between axial and torsional
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Postural balance effects from exposure to multi-axial
网页2021年2月1日As there is limited evidence on the effects of multi-axial WBV exposures on off-road mining vehicle operators’ postural stability and associated risks for fall-related
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An articulated pipe‐miner system with thrust control for
网页2008年12月23日The articulation reduces the stringent requirements on the buffer‐miner slant range, providing more freedom to the miner maneuvering on the seafloor. 2‐D
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Axial Movement an overview ScienceDirect Topics
网页Axial movement is the change in dimensional length of the bellows from its free length in a direction parallel to its longitudinal axis. Axial movement. Angular movement is
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Evaluation of Multi-axial Active Suspension to Reduce Whole Body
网页2019年10月29日Practitioner Summary: This study found that mining vehicles’ multi-axial WBV can increase biomechanical loading in the neck and back more so than on-road
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Axial mining Article about axial mining by The Free Dictionary
网页Find out information about axial mining. Continuous or intermittent nuisance mining in great depth along the axis of enemy advance. McGraw-Hill Dictionary of Scientific
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Vibro-impact model and validation of the axial dynamics of a
网页2020年10月24日The axial dynamics of the components inside the vibration-assisted drilling tool can be simplified into the impact interaction among four main components: the tool housing, anvil, recoil spring and bit assembly, as indicated in Fig. 2.The tool housing is responsible for transmitting the loads from the surface to the bit, as well as to isolate the
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Advances in Mechanical Engineering 2022, Vol. 14(6) 1–17
网页2022年2月19日state of drill string motion. In addition, the ratio of axial and torsional vibration natural frequencies of drill string also affects the stability of drill string movement. When the ratio of axial and torsional vibration natural frequencies is 1:1, the stability of drill string motion will be greatly improved. 2 Advances in Mechanical Engineering
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Axial Performance of Cementitious Grouted Cable Bolts Under
网页2022年6月27日With the increased use of cable bolts in mining and civil projects worldwide, it is important to understanding the performance of these support structures in different scenarios. The axial load transfer mechanisms of six cable bolts were investigated experimentally in this research study. A large-scale pull-out testing apparatus with a
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Modeling of Coupled Axial and Torsional Motions of a Drilling
网页2015年10月28日Rock Mechanics and Mining Sciences, 48 (5), It is demonstrated that an additional active controller for the axial motion can be effective in suppressing both stick-slip and bit-bounce.
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Postural balance effects from exposure to multi-axial whole-body
网页2021年2月1日1. Introduction. Mining vehicle operators suffer from a high prevalence of various occupational injuries (Groves et al., 2007; Weston et al., 2016).Among all of the occupational injuries in mining industry, fall-related injuries are the second largest in number (Groves et al., 2007; Landen, 2000).Of those, nearly 50% of fall-related injuries
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An articulated pipe‐miner system with thrust control for
网页2008年12月23日An articulated deep‐ocean pipe system with its bottom end free is described. The articulation reduces the stringent requirements on the buffer‐miner slant range, providing more freedom to the miner maneuvering on the seafloor. 2‐D deflection and 3‐D motions of a 5,486‐m‐long (18,000‐ft) articulated pipe system and buffer can be
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Effects of heave motion on the dynamic performance of vertical
网页2020年8月1日He mainly studied the influence of mining ship heave motion on the axial tension of the mining pipe and obtained the law of axial stress changing with time [14].
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Evaluation of Multi-axial Active Suspension to Reduce Whole
网页2019年10月29日Furthermore, the current industry standard approaches to reduce WBV exposures in most mining vehicles rely on passive vertical (Z-axis) suspension systems, which are found to be ineffective in
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Experiments For Modeling Internal Fluid Effect On Hung-off
网页2010年3月1日Experiments For Modeling Internal Fluid Effect On Hung-off Rigid Riser Under Axial Motion Yasuhiro Namba; Yasuhiro Namba Ocean Engineering Department, National Maritime Research Institute. Search for other works by have applied the theory and numerically solved the problem for dynamic vertical oscillation of an ocean mining
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Axial mining Article about axial mining by The Free Dictionary
网页axial mining. Continuous or intermittent nuisance mining in great depth along the axis of enemy advance. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content .
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Vibro-impact model and validation of the axial dynamics of a
网页2020年10月24日The axial dynamics of the components inside the vibration-assisted drilling tool can be simplified into the impact interaction among four main components: the tool housing, anvil, recoil spring and bit assembly, as indicated in Fig. 2.The tool housing is responsible for transmitting the loads from the surface to the bit, as well as to isolate the
Contact
Axial Performance of Cementitious Grouted Cable Bolts Under
网页2022年6月27日With the increased use of cable bolts in mining and civil projects worldwide, it is important to understanding the performance of these support structures in different scenarios. The axial load transfer mechanisms of six cable bolts were investigated experimentally in this research study. A large-scale pull-out testing apparatus with a
Contact
Advances in Mechanical Engineering 2022, Vol. 14(6) 1–17
网页2022年2月19日state of drill string motion. In addition, the ratio of axial and torsional vibration natural frequencies of drill string also affects the stability of drill string movement. When the ratio of axial and torsional vibration natural frequencies is 1:1, the stability of drill string motion will be greatly improved. 2 Advances in Mechanical Engineering
Contact
Modeling of Coupled Axial and Torsional Motions of a Drilling
网页2015年10月28日Rock Mechanics and Mining Sciences, 48 (5), It is demonstrated that an additional active controller for the axial motion can be effective in suppressing both stick-slip and bit-bounce.
Contact
Dual-Axial Tool Servo Diamond Turning of Hierarchical Micro
网页2021年6月7日This stone reports on a dual-axial tool servo diamond turning method for the one-step fabrication of hierarchical micro-nano-structured surfaces. With respect to the dual-axial servo motion (XZ), the z-axis motion can generate the primary surface with a complex shape, and the x-axis motion is used to synchronously form the secondary
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Effects of heave motion on the dynamic performance of vertical
网页2020年8月1日He mainly studied the influence of mining ship heave motion on the axial tension of the mining pipe and obtained the law of axial stress changing with time [14].
Contact
Evaluation of Multi-axial Active Suspension to Reduce Whole
网页2019年10月29日Furthermore, the current industry standard approaches to reduce WBV exposures in most mining vehicles rely on passive vertical (Z-axis) suspension systems, which are found to be ineffective in
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Seismic Sensors GeophonesAccelerometers IMS
网页Every seismic sensor manufactured by IMS, whether geophone, accelerometer or a hybrid combination, can now include digital XGM sensors. The XGM sensor is able to record the strong ground motions that conventional sensors and ADCs cannot. Furthermore, because they are sensitive to frequencies down to DC, they will also be capable of recording
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The raw-materials challenge: How the metals and mining sector
网页2022年1月10日The required pace of transition means that the availability of certain raw materials will need to be scaled up within a relatively short time scale—and, in certain cases, at volumes ten times or more than the current market size—to prevent shortages and keep new-technology costs competitive (see sidebar “Rare-earth metals”).
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Axial mining Article about axial mining by The Free Dictionary
网页axial mining. Continuous or intermittent nuisance mining in great depth along the axis of enemy advance. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content .
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