Relevant bibliographies by topics / Hyperbolic rollers

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Hyperbolic rollers'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Hyperbolic rollers"

1

Yan, Hong-Sen, and Hsin-Hung Chen. "Geometry Design of Globoidal Cams With Generalized Meshing Turret-Rollers." Journal of Mechanical Design 118, no. 2 (June 1, 1996): 243–49. http://dx.doi.org/10.1115/1.2826876.

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This paper derives the generalized surface equation for cylindrical, conical, and hyperbolic meshing turret-rollers. Based on the generalized equation of meshing turret-rollers, generalized mathematical expressions of surface geometry for globoidal cams with cylindrical, conical, and hyperbolic meshing turret-rollers are derived using theory of conjugate surfaces, differential geometry, and coordinate transformation. A design example is presented for demonstrating procedures of surface generating of the globoidal cam. The result of this work is necessary for the computer-aided design and manufacturing of roller gear cams for industrial applications.
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ANDREOTTI, BRUNO, STÉPHANE DOUADY, and YVES COUDER. "An experiment on two aspects of the interaction between strain and vorticity." Journal of Fluid Mechanics 444 (September 25, 2001): 151–74. http://dx.doi.org/10.1017/s0022112001005353.

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Presented here are two results concerning the interaction between vorticity and strain. Both are obtained experimentally by investigating the hyperbolic flow created in Taylor's four-roll mill. It is first shown that this pure straining flow becomes intrinsically unstable through a supercritical bifurcation to form an array of counter-rotating vortices aligned in the stretching direction. The dimensionless parameter characterizing the flow is the internal Reynolds number Re = γΔ2/v based on the velocity gradient γ and on the gap between the rollers Δ, and the threshold value is Rec = 17. Near the threshold, the transverse velocity profiles of these vortices are in excellent agreement with those predicted by the theory of Kerr & Dold (1994) in the case of an infinite hyperbolic flow. A second result is obtained at high Reynolds number. Measurements of the velocity profile in the direction parallel to the vortices show that the velocity gradient (the stretching) is systematically weaker inside the vortices than elsewhere. This demonstrates experimentally the existence of a negative feedback of rotation on stretching. This effect is ascribed to the two-dimensionalization due to the vortex fast rotation. An implication of these results for turbulent flows is a nonlinear limitation of the vorticity stretching, an effect characterized recently by Ohkitani 1998.
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Ivanova, K. A., and S. L. Gavrilyuk. "Structure of the hydraulic jump in convergent radial flows." Journal of Fluid Mechanics 860 (December 7, 2018): 441–64. http://dx.doi.org/10.1017/jfm.2018.901.

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We are interested in the modelling of multi-dimensional turbulent hydraulic jumps in convergent radial flow. To describe the formation of intensive eddies (rollers) at the front of the hydraulic jump, a new model of shear shallow water flows is used. The governing equations form a non-conservative hyperbolic system with dissipative source terms. The structure of equations is reminiscent of generic Reynolds-averaged Euler equations for barotropic compressible turbulent flows. Two types of dissipative term are studied. The first one corresponds to a Chézy-like dissipation rate, and the second one to a standard energy dissipation rate commonly used in compressible turbulence. Both of them guarantee the positive definiteness of the Reynolds stress tensor. The equations are rewritten in polar coordinates and numerically solved by using an original splitting procedure. Numerical results for both types of dissipation are presented and qualitatively compared with the experimental works. The results show both experimentally observed phenomena (cusp formation at the front of the hydraulic jump) as well as new flow patterns (the shape of the hydraulic jump becomes a rotating square).
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Hong-Sen, Yan, and Chen Hsin-Hung. "Geometry design of roller gear cams with hyperboloid rollers." Mathematical and Computer Modelling 22, no. 8 (October 1995): 107–17. http://dx.doi.org/10.1016/0895-7177(95)00160-4.

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5

Khloponin, V. N. "Using the Properties of a One-Sheet Hyperboloid in Bearings with Cylindrical Rollers." Russian Engineering Research 40, no. 12 (December 2020): 988–94. http://dx.doi.org/10.3103/s1068798x20120072.

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Richard, G. L., and S. L. Gavrilyuk. "The classical hydraulic jump in a model of shear shallow-water flows." Journal of Fluid Mechanics 725 (May 16, 2013): 492–521. http://dx.doi.org/10.1017/jfm.2013.174.

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AbstractA conservative hyperbolic two-parameter model of shear shallow-water flows is used to study the classical turbulent hydraulic jump. The parameters of the model, which are the wall enstrophy and the roller dissipation coefficient, are determined from measurements of the roller length and the deviation from the Bélanger equation of the sequent depth ratio (experimental data by Hager & Bremen, J. Hydraul. Res., vol. 27, 1989, pp. 565–585; and Hager, Bremen & Kawagoshi, J. Hydraul. Res., vol. 28, 1990, pp. 591–608). Stationary solutions to the model describe with a good accuracy the free-surface profile of the hydraulic jump. The model is also capable of predicting the oscillations of the jump toe. We show that if the upstream Froude number is larger than ${\sim }1. 5$, the jump toe oscillates with a particular frequency, while for the Froude number smaller than 1.5 the solution becomes stationary. In particular, we show that for a given flow discharge, the oscillation frequency is a decreasing function of the Froude number.
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Zhang, Yan, Di Han, Deyang Du, Gaoshan Huang, Teng Qiu, and Yongfeng Mei. "Rolled-Up Ag-SiOx Hyperbolic Metamaterials for Surface-Enhanced Raman Scattering." Plasmonics 10, no. 4 (March 1, 2015): 949–54. http://dx.doi.org/10.1007/s11468-015-9884-7.

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Zou, Jian Lai, Zi Li Kou, Chao Xu, Pei Wang, Shuai Yin, and Yong Li. "Sintering of Frustum Shaped Polycrystalline Diamond Compact at Non-Hydrostatic Pressure." Applied Mechanics and Materials 665 (October 2014): 11–16. http://dx.doi.org/10.4028/www.scientific.net/amm.665.11.

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This work present the study of the sintering of polycrystalline diamond compact with hyperbolic truncated cone profile using hexagonal boron nitride assembly, rather than salt mold, which is different from conventional assembly and this kind of polycrystalline diamond compact is widely used in percussion rock bits and roller cone rock bits. The well-sintered polycrystalline diamond compact without transition layer is prepared on a WC-10wt% Co substrate at temperature 1450°C for 3 min at non-hydrostatic high pressure of 5.5Gpa.Different analyzing techniques, such as X- ray diffraction, micro-Raman spectroscopy, scanning electron microscopy were applied to characterize the micro-structure, residual stress and sintering behavior. The SEM analysis indicates that diamond-diamond (D-D) direct bonding had formed in the polycrystalline diamond layer. The Raman spectroscopy shows compressive stress in the polycrystalline diamond layer is much higher than that sintered using traditional assembly.
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Wang, Gui Yong, Bo Qian, Qiang Li, and Yu Yan. "Research on Variable Time-Domain Discrete Interpolation Control in Flexible Roll Forming." Applied Mechanics and Materials 55-57 (May 2011): 1687–92. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1687.

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Due to the complex motion control in flexible roll forming when processing the sheet metal with variable cross-section, it is required for high real-time and high precision control during the processing. Controlling servo motor by adopting the configuration programming is a common approach to achieve roller motion, but it will not be able or difficult to realize by the configuration programming for complex contour sheet metal without the rules such as hyperbolic, or the molding product in non-symmetric cross-section shape, etc. Based on the process characteristic of flexible roll forming and its motion control technology, this paper adopts the variable time-domain discrete interpolation control method to process the variable cross-section sheet metal. Experiments indicate that this control method provides a good operating method for the sheet metal forming with complex variable cross-section shape in flexible roll forming.
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10

Han, Yixuan, Changwei Yang, Degou Cai, Hongye Yan, and Hailing Zeng. "Study on Intelligent Compaction-Equipment Logistics Scheduling and Propagation Characteristics of Vibration Wave in Nonlinear Systems with Multistability Based on Field Test." Complexity 2020 (April 10, 2020): 1–13. http://dx.doi.org/10.1155/2020/1492340.

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The equipment scheduling and propagation characteristics of vibration wave from vibratory roller ⟶ filling material nonlinear systems with multistability are the core problems of subgrade intelligent construction technology, and the logistics scheduling of the equipment is directly related to the construction efficiency. Aiming at the shortages, one typical subgrade located at the Gu’an station of Beijing-Xiong’an city railway is selected to research and finish the field tests; some findings are shown as follows: first, some valuable suggestions about the logistics scheduling of intelligent equipment are proposed, which can break the barriers between the organizations and improve construction efficiency; second, when the vibration wave propagates from the vibratory roller ⟶ surface of filling material ⟶ different buried depths of filling material, the peak acceleration of vibration wave gradually decreases and is hyperbolic distribution approximately. At the same time, the sensitive of attenuation is shown as follows: Z<X ≈ Y, and the critical depth of vibration energy propagation is about 1.0 m. At the same time, the peak acceleration of vibration wave at the interface of different filling material layers exists in steps and is “side clock” distribution approximately with the increase in buried depth. Third, in the propagation process, with the increase in buried depth, the amplitude of fundamental, primary, secondary, until fifth harmonics decreases exponentially (R2>0.9), and the concrete functional relationship among different amplitudes of harmonics can be summarized as y = Ae−BX; fourth, the vibration energy is mainly concentrated near 10–30 Hz in the vibratory roller, but when the vibration wave propagates from vibratory roller⟶filling material, the vibration energy gradually decreases with the increase in depth, and the marginal spectrum gradually changes from one peak to two peaks, that is, 30–50 Hz and 50–100 Hz; fifth, the vibration energy in the vibrational wheel is distributed averagely in the compaction process, and the effective compaction time is two seconds, which will be helpful for revealing the propagation characteristics of vibration wave, optimizing the compaction quality control models and providing some support for the development of intelligent compaction theory of railway subgrade.
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Dissertations / Theses on the topic "Hyperbolic rollers"

1

Benešovský, Marek. "Výpočtová simulace kosoúhlého rovnání tyčí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232108.

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Final thesis describes two variants of computational models to simulate cross-roll leveling of rods, which are based on the Lagrangian approach to describe the continuum. Implementation of both variants was performed in ANSYS software, and their main difference lies in the choice of the type of elements for the discretization. An integral part of this thesis is the description of the principle, which is an evaluation of the curvature of the rod after completion of the simulation leveling. In the other part of the work are presented the results, which are then compared with realized experiment and simulation algorithm for cross-roll leveling based on the Euler approach. The final part is dedicated to the optimal settings of the leveller.
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Conference papers on the topic "Hyperbolic rollers"

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Yan, Hong-Sen, and Hsin-Hung Chen. "Geometry Design of Roller Gear Cams With Generalized Meshing Elements." In ASME 1994 Design Technical Conferences collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/detc1994-0096.

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Abstract This paper derives the generalized expression of surface equation for cylindrical, conical, and hyperbolic meshing elements. Based on the generalized equation of meshing elements, generalized mathematical expressions of surface geometry for roller gear cams with cylindrical, conical, and hyperbolic meshing elements are derived by theory of conjugate surfaces, differential geometry, and coordinate transformation. Design examples are given. The result of this work is of necessary for the computer-aided design and manufacturing roller gear cams for industrial applications.
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2

Schulz, Marvin, Hoan Vu, Stephan Schwaiger, Andreas Rottler, Tobias Korn, David Sonnenberg, Tobias Kipp, and Stefan Mendach. "Controlling the spontaneous emission rate of quantum wells in rolled-up hyperbolic metamaterials." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734216.

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