Results 251 to 260 of about 351,466 (302)
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Parametric study on thrust force of core drill
Journal of Materials Processing Technology, 2007Abstract Drilling-induced delamination is among the major concerns of applying the fiber-reinforced composite materials in various industries. Core drill possesses the advantage for reducing the delamination by distributing the drilling thrust force toward the drill periphery.
C.C. Tsao, H. Hocheng
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Optimum thrust trajectories in general central force fields
Astrodynamics Conferece, 1978The well known "primer theory" of Lawden is used for the analysis of optimal coplanar orbital transfers in general central force fields. Two first-integrals, which hold for singular thrusting arcs as well as impulsive thrusts, are shown to become linearly dependent if a circular coasting arc forms part of an optimal trajectory.
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Intelligent Modeling of Thrust Force in Drilling Process
Journal of Dynamic Systems, Measurement, and Control, 2006In this paper, an intelligent modeling strategy for thrust force in drilling process is proposed. First of all, neural network (NN) models are developed to model the thrust force in drilling process. Second, drill head position information is included in the NN model to get better force prediction accuracy for entrance and exit drilling stages.
Ye Sheng, Masayoshi Tomizuka
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Direct thrust force measurement of pulse detonation engine
AIP Conference Proceedings, 2012In this paper we present the result of High-Speed Reacting Flow Laboratory (HiREF) pulse detonation engine (PDE) experimental study on direct thrust measurement. The thrust force generated by the repetitive detonation from a 50 mm inner diameter and 600 mm length tube was directly measured using load cell.
Abdul Wahid, Mazlan +2 more
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Thrust force calculations for pressure safety valves
Process Safety Progress, 2006AbstractWhen a pressure safety valve actuates, thrust forces are developed. These thrust forces must be considered for the proper installation of the relieving device. For gas or vapor compressible flow, Simpson developed thrust force plots that can be used to calculate the magnitude of the thrust force.
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The Thrust Force Structure in Drilling
2009The purpose of this work is to present investigation of the thrust force generated during drilling process. The thrust force acting on drill is the sum of three components: the cutting component, the thrust force attributed to ploughing at the chisel edge and the thrust force resulting from friction at the margin.
Sekulić, Milenko +4 more
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Generic Analytical Thrust-Force Model for Flapping Wings
AIAA Journal, 2018The purpose of this paper is to propose a generic analytical flapping-wing cycle-average thrust-force estimation method by implementing elongated body theory into actuator disk theory.
Zongxia Jiao +3 more
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Thrust force requirements for TBMs in squeezing ground
Tunnelling and Underground Space Technology, 2010Rapidly converging ground may exert such a high pressure on the shield that the thrust force is no longer sufficient to overcome shield skin friction and the TBM becomes jammed. This paper advances a number of theory-based decision aids, which will support rapid, initial assessments to be made of thrust force requirements.
M. Ramoni, G. Anagnostou
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Identification of thrust force models for vibratory drilling
International Journal of Machine Tools and Manufacture, 2009Abstract Among the scientific problems in drilling, determining thrust forces for any drill geometry and any workmaterial remains an issue. This question is especially critical in the context of the self-vibratory drilling (SVD) technology, since thrust force governs the trajectory of cutting lips.
Guibert, Nicolas +3 more
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Transient Thrust Forces on a Twin Scroll Turbocharger
Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, 2017The bearing system of turbochargers used in trucks needs to be optimized in order to reduce the frictional losses. This helps in transmitting the exhaust energy more efficiently to the compressor wheel to increase boost pressure. Understanding the thrust loading on the axial bearing helps in optimal design of the bearing and the associated lubrication ...
Janakiraman Thiyagarajan +2 more
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