Journal articles: 'Flexible ring'

1

Noda, Atsuhito. "Flexible ring interconnection system." Journal of the Acoustical Society of America 123, no. 3 (2008): 1228. http://dx.doi.org/10.1121/1.2901334.

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Spratt, John R., John A. Spratt, and Gerald M. Lawrie. "Mitral annuloplasty ring dehiscence: Optimal force distribution with flexible rings." Journal of Thoracic and Cardiovascular Surgery 152, no. 6 (December 2016): 1639. http://dx.doi.org/10.1016/j.jtcvs.2016.07.047.

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Liu, Shiyun, Satoshi Murata, and Ibuki Kawamata. "DNA Ring Motif with Flexible Joints." Micromachines 11, no. 11 (October 31, 2020): 987. http://dx.doi.org/10.3390/mi11110987.

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The invention of DNA origami has expanded the geometric complexity and functionality of DNA nanostructures. Using DNA origami technology, we develop a flexible multi-joint ring motif as a novel self-assembling module. The motif can connect with each other through self-complementary sequences on its segments. The flexible joints can be fixed in a straightened position as desired, thereby allowing the motif to take various shapes. We can adjust the number of flexible joints and the number of connectable segments, thereby enabling programmable self-assembly of the motif. We successfully produced the motif and evaluated several self-assembly patterns. The proposed multi-joint ring motif can provide a novel method for creating functional molecular devices.

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4

Leblanc, K., P. Berdague, P. Judeinstein, J. P. Bayle, and M. H. Guermouche. "Nematogens incorporating a lateral flexible ring." Liquid Crystals 28, no. 2 (February 2001): 265–69. http://dx.doi.org/10.1080/02678290010006298.

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Kim, Yeunhee, Kahye Song, Jae-Bok Song, and Youngsu Cha. "Energy harvesting from flexible piezoelectric ring." Smart Materials and Structures 28, no. 8 (July 23, 2019): 084007. http://dx.doi.org/10.1088/1361-665x/ab29a8.

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Zhao, Dan, Lizhong Xu, and Yuming Fu. "Effects of molecule force on free vibration for a micro electromagnetic harmonic drive system." Mechanics & Industry 22 (2021): 12. http://dx.doi.org/10.1051/meca/2021008.

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In this paper, a micro electromagnetic harmonic drive system is proposed. Considering Van der Waals force, dynamics equation of the flexible ring for the micro drive system is deduced and resolved. Using the equations, the effects of the molecule force on the natural frequencies and vibration modes of the drive system are investigated. Results show that considering molecule force, natural frequencies of the flexible ring are reduced and its vibration modes are changed. For lower order modes, smaller clearance between the flexible ring and stator, smaller thickness of the flexible ring and larger radius of the flexible ring, the effects of the molecule force on the natural frequencies and vibration modes are more obvious.

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7

Hu, Shengyang, Zongde Fang, Yabin Guan, Xiangying Hou, and Chao Liu. "Study on Structural Vibration Characteristics of L-Shaped Flexible Ring Gear and Establishment of System Coupling Vibration Model." Machines 10, no. 5 (May 6, 2022): 339. http://dx.doi.org/10.3390/machines10050339.

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L-shaped flexible ring gear is a new solution to the non-uniform load distribution of planetary transmission systems. At present, the research on L-shaped flexible ring gear is still focused on its meshing characteristics and dynamic load sharing performance, and its structural vibration characteristics and dynamic coupling vibration characteristics with the system are not involved. Considering that the structural flexibility of the L-shaped flexible ring gear is significantly higher than that of the traditional ring gear, the structural vibration will obviously affect the load sharing and dynamic load factor performance of the transmission system, as well as the safety and reliability of the mechanism. Due to its strong structural flexibility and structural particularity, the existing dynamic analysis model is difficult to meet the requirements of analysis and design. In this paper, the coupling vibration model of L-shaped flexible ring gear planetary transmission systems is established, and the structural vibration characteristics of L-shaped flexible ring gear and its influence on the dynamic performance of the systems are deeply analyzed. The model foundation and theoretical guidance are provided for the design of L-shaped flexible ring gear and the analysis of the dynamic characteristics of flexible ring gear systems.

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8

Bakhshandeh, Ali Reza, Mehrdad Salehi, Hasan Radmehr, Ahmad Reza Nasr, Mehrzad Rahmanian, and Khosro Sharifi. "Autologous Ring vs. Flexible Prosthetic Ring for Ischemic Mitral Regurgitation." Asian Cardiovascular and Thoracic Annals 18, no. 2 (April 2010): 127–30. http://dx.doi.org/10.1177/0218492309344632.

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9

Csuk, René, and Leo Eversmann. "Synthese flexibler difluorierter cyclopropanoider Nucleosidanaloga / Synthesis of Flexible Difluorinated Cyclopropanoid Nucleoside Analogues." Zeitschrift für Naturforschung B 58, no. 12 (December 1, 2003): 1176–86. http://dx.doi.org/10.1515/znb-2003-1205.

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10

Kim, Boyoung, Wei-Xi Huang, Soo Jai Shin, and Hyung Jin Sung. "Flexible ring flapping in a uniform flow." Journal of Fluid Mechanics 707 (August 2, 2012): 129–49. http://dx.doi.org/10.1017/jfm.2012.267.

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AbstractAn improved version of the immersed boundary (IB) method for simulating an initially circular or elliptic flexible ring pinned at one point in a uniform flow has been developed. The boundary of the ring consists of a flexible filament with tension and bending stiffness. A penalty method derived from fluid compressibility was used to ensure the conservation of the internal volume of the flexible ring. At $\mathit{Re}= 100$, two different flapping modes were identified by varying the tension coefficient for a fixed bending stiffness, or by changing the bending coefficient for a fixed tension coefficient. The optimal tension and bending coefficients that minimize the drag force of the flexible ring were found. Visualization of the vorticity field showed that the two flapping modes correspond to different vortex shedding patterns. We observed the hysteresis property of the flexible ring, which exhibits bistable states over a range of flow velocities depending on the initial inclination angle, i.e. one is a stationary stable state and the other a self-sustained periodically flapping state. The Reynolds number range of the bistability region and the flapping amplitude were determined for various aspect ratios $a/ b$. For $a/ b= 0. 5$, the hysteresis region arises at the highest Reynolds number and the flapping amplitude in the self-sustained flapping state is minimized. A new bistability phenomenon was observed: for certain aspect ratios, two periodically flapping states coexist with different amplitudes in a particular Reynolds number range, instead of the presence of a stationary stable state and a periodically flapping state.

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11

Yu, Yang, En Zhu, Xiaoyang Chen, and Yang Wang. "Load analysis and deformation research of the flexible bearing based on a three-force ring superposition method." Mechanics & Industry 22 (2021): 34. http://dx.doi.org/10.1051/meca/2021030.

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The flexible bearing is a key component of harmonic reducer enabling the flexspline to generate a controllable elastic deformation. Its performance and life will significantly affect the normal operation of harmonic reducer. In order to improve the life and the working performance of the flexible bearing, the calculation of its load distribution is necessary. Based on the theory of thin-walled ring, the relationship between radial deformation and load of three-force ring was derived. Then a superposition model of three-force ring was developed to calculate rapidly the load distribution of flexible bearings with elliptical cams in harmonic reducers. The validity of the proposed model was proved by comparing with a static analysis model. In this paper, the influences of ball number and external load on the load distribution, radial deformation and bending normal stress of outer ring were investigated by three-force ring superposition method. Based on the deformation of three-force ring, the deformation characteristics and bending normal stress distribution of outer ring of the flexible bearing were analyzed, and several regular results were found.

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12

Seils, Joachim, and R. Pecora. "Dynamic light scattering from flexible ring macromolecules." Macromolecules 25, no. 1 (January 1992): 350–53. http://dx.doi.org/10.1021/ma00027a054.

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13

Rivera, R., E. Duran, and M. Ajuria. "Carpentier’s flexible ring versus De Vega’s annuloplasty." Journal of Thoracic and Cardiovascular Surgery 89, no. 2 (February 1985): 196–203. http://dx.doi.org/10.1016/s0022-5223(19)38814-2.

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14

Bezon, Eric, Ahmed Ismail Abdel Aziz Khalifa, Jean Noël Choplain, and Jean Aubert Barra. "Homemade expanded-polytetrafluoroethylene flexible mitral annuloplasty ring." European Journal of Cardio-Thoracic Surgery 29, no. 2 (February 2006): 251–52. http://dx.doi.org/10.1016/j.ejcts.2005.11.013.

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15

Liang, Yongli, and Lizhong Xu. "Forced Response of an Electromagnetic Harmonic Movable Tooth Drive System to Current Excitation." Open Mechanical Engineering Journal 9, no. 1 (February 18, 2015): 65–70. http://dx.doi.org/10.2174/1874155x01509010065.

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In this study, the authors proposed an electromagnetic harmonic movable tooth drive system. , The forced response equation of the drive system to exciting currents was developed. Using this equation, the forced responses of the drive system to exciting currents were investigated. The results show that the forced responses of the drive system to the exciting currents were affected by mechanical and electric parameters. To reduce the vibrating amplitudes, smaller coil current, flexible ring radius, and average static displacement of the flexible ring, increased thickness of the flexible ring, clearance between the flexible ring and coils, and coil pole pair number should be taken into account. The results can be used for designing the system and further study of the dynamics performance of the drive system.

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16

Sun, Hua. "Optimization Design of the Composite Hub Connection Structure Based on ANSYS Software Technology." Advanced Materials Research 139-141 (October 2010): 1068–72. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1068.

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This article through analysing coupler's structure, involute spline's stress situation, the tooth face contact intensity, the tooth root bending strength, the tooth root shearing strength, tooth face wear ability and the external spline reverse and curving bearing capacity carry on the precise computation and the examination, simultaneously a multianalysis bulge tight joint set of structure and the correlation computation examination, has established the shaft bossing compound coupler main spare part structure type. In this article based on the shaft bossing composite construction optimization design is targeted mainly flexibility swelling ring shape to optimize the design, change that flexibility swelling ring cone-cone angle, which makes flexible swelling ring Auxiliary T-twisting greater. In the analysis, it is necessary to use the software ANSYS, through the creation of the shaft bossing composite construction of the parametrization model, a flexible swelling ring cone-cone angle of the design variables and flexibility swelling ring allowable material stress as binding conditions, bulging with flexible support ring-twisting as the objective function of T,right propeller shaft coupler hub composite structure axisymmetric analysis, contact analysis and design optimization, inflation reached a flexible support ring largest T-twisting, work stress does not exceed the allowable material stress, elastic swelling ring-cone angle of the optimal solution.

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17

Deng, Yaoji, Youqun Zhao, Han Xu, Fen Lin, and Qiuwei Wang. "Rigid-flexible coupling modelling and dynamic performance analysis of novel flexible road wheel." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 234, no. 1 (September 11, 2019): 67–81. http://dx.doi.org/10.1177/1464419319874198.

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A novel flexible road wheel with hub-hinge-ring combined structure is introduced to improve the buffer damping performance and lightweight level of tracked vehicles. To balance computational efficiency and precision, an advanced rigid-flexible coupled model of the flexible road wheel is established using a hybrid modelling method combining finite element method and multi-body dynamics. The reliability and accuracy of the established rigid-flexible coupled model are verified by wheel static loading experiment. The modal flexible body of the elastic outer ring is developed by modified Craig-Bampton method and the simulated results are in good agreement with the experimental data. Based on the verified rigid-flexible coupled model, the dynamic characteristics of the flexible road wheel under typical operation conditions were investigated. The simulation results show that when the motion state changes, the elastic outer ring will produce a hysteretic angle with respect to the hub, delaying the transmission of torque. The system parameters have a greater effect on the vertical vibration of the flexible road wheel. The higher the vehicle speed, the more vibration will be caused, and the increase in the load and number of hinge groups will reduce the vibration. The research results provide reference for structure optimization of flexible road wheel and lay a foundation for flexible multi-body dynamic simulation of tracked vehicles with flexible road wheels.

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18

Watanabe, Masahiro, and Nobuyuki Kobayashi. "Dispersion Relation and Stability Analysis of Flow-Induced Wave of a Flexible Circular Ring Subjected to Swirling Fluid Flow." Journal of Pressure Vessel Technology 123, no. 4 (June 22, 2001): 442–47. http://dx.doi.org/10.1115/1.1398286.

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This paper deals with a theoretical stability analysis of unstable wave generated in a flexible circular ring subjected to swirling fluid flow. The flexible circular ring is set in a rotating circular outer casing with a narrow gap filled with fluid and is subjected to the swirling fluid flow caused by the rotation of the outer casing. In the stability analysis, a wave equation is derived from the equation of motion of the flexible circular ring coupled with the swirling fluid flow. The equation of motion of the flexible circular ring is based on the Kirchhoff-Love’s thin-shell model, and the equations of motion of the swirling fluid flow are based on the Navier-Stokes equations. Moreover, the dispersion relation of the wave generated in the flexible circular ring is derived from the wave equation as a function of the rotational speed of the outer casing. The analytical results show that an unstable wave occurs as a type of traveling forward wave due to the swirling fluid flow when the rotational speed of the outer casing becomes high, and that the most unstable wave mode, phase speed (traveling-wave speed), and growth rate of the wave vary greatly with increasing rotational speed of the outer casing.

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19

Xu, Huachao, and Datong Qin. "Vibration characteristics of flexible spur ring gears using different connection types." Journal of Low Frequency Noise, Vibration and Active Control 39, no. 2 (April 21, 2019): 246–57. http://dx.doi.org/10.1177/1461348419842029.

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In this paper, a two-dimensional Timoshenko beam theory is adopted to establish a vibration analysis model for flexible spur ring gears. Based on this model, the vibration characteristics of a ring gear subjected to various connection types are investigated, and the corresponding vibration modes are classified and defined. It is demonstrated that the vibration characteristics of a ring gear vary for different connection types. When vibration analysis and design are performed for a planetary gear set or ring gear, the boundary condition of the ring gear model must closely match that of the actual connection type. When a ring gear is applied as the output component, the vibration modes are classified as rigid body, flexural deflection, and extensible deflection modes. Correspondingly, for bond connections, the vibration modes of a ring gear are classified as flexural deflection and extensible deflection modes. Furthermore, for a bolt connection, only flexural deflection modes arise as vibration modes of the ring gear, while for fixed connections, the vibration modes are local flexural deflection modes.

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20

Chang-Joon Chae. "A flexible and protected virtual optical ring network." IEEE Photonics Technology Letters 14, no. 11 (November 2002): 1626–28. http://dx.doi.org/10.1109/lpt.2002.803329.

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21

Kundera, C., V. Martsynkovskyy, and A. Zahorulko. "Remarks on modeling the flexible seal ring housing." IOP Conference Series: Materials Science and Engineering 233 (August 2017): 012034. http://dx.doi.org/10.1088/1757-899x/233/1/012034.

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22

Gorbunov, A. A., and A. M. Skvortsov. "Theory of the chromatography of flexible ring macromolecules." Polymer Science U.S.S.R. 28, no. 11 (January 1986): 2722–29. http://dx.doi.org/10.1016/0032-3950(86)90311-4.

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23

Baria, Kinnaresh, Jignesh Kothari, Sanjay Patel, and Yogini Kandre. "Evaluation of Outcomes of Tricuspid Valve Flexible Ring Annuloplasty with Left Sided Heart Valve Surgery." Journal of Cardiovascular Medicine and Surgery 4, no. 4 (2018): 261–69. http://dx.doi.org/10.21088/jcms.2454.7123.4418.1.

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24

Oestreich, Brett, Mackenzie Mbai, Kolja Sievert, Nalan Schnelle, Louann Carpenter, Horst Sievert, Matthew Soule, Rosemary F. Kelly, Alok Sharma, and Stefan Bertog. "Transcatheter Mitral Valve-in-Ring Implantation in the Flexible Adjustable Attune Annuloplasty Ring." Cardiovascular Revascularization Medicine 21, no. 11 (November 2020): 54–59. http://dx.doi.org/10.1016/j.carrev.2020.07.011.

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25

Abe, Kohei, Kohei Kawazoe, Manabu Yamasaki, Kunihiko Yoshino, and Hiroyasu Misumi. "New Flexible Internal Annular Fixation Rings for Tricuspid Aortic Valves." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 14, no. 1 (February 2019): 60–65. http://dx.doi.org/10.1177/1556984519828018.

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Objectives Although aortic annulus repair has a long history, there are still no ideal devices to control an aortic annulus. We have developed a new method involving the use of an expanded polytetrafluoroethylene graft with the support of a metallic ring holder during implantation from inside an aorta, with no dissection of the surrounding aortic annulus. Methods We used aortic annular rings of 18 to 24 mm made of Gore-Tex tubed grafts (W.L. Gore & Associates, Flagstaff, AZ, USA) and metallic ring holder. After cutting the graft circumferentially to a 5-mm thickness, it was compressed manually to decrease the thickness. Then, a metallic ring holder corresponding to the graft size was inserted into the graft. The metallic ring holder was fixed to the graft with one 4–0 monofilament suture using 6 holes and the side trench on the metallic ring holder. The proper size for the graft was determined, and the appropriate annuloplasty ring was selected. A row of 4–0 double-needle braided sutures with expanded polytetrafluoroethylene spaghettis was sewn from the aortic side into the left ventricular outflow tract with a horizontal mattress stitch. After all sutures around the annulus were placed, they were tied down and the metallic ring holder was removed. The leaflets were repaired if necessary. Results A total of 9 patients with tricuspid aortic valve have undergone this procedure since January 2015. The sizes of the aortic annular rings were 20 mm ( n = 3), 22 mm ( n = 5), and 24 mm ( n = 2). Aortic leaflets were repaired in 6 patients (6 central plications). Concomitant procedures were total aortic arch replacement ( n = 2), mitral valve repair ( n = 2), tricuspid valve repair ( n = 1), and coronary artery bypass grafting ( n = 2). There were no hospital deaths and no major morbidities. All patients were checked for mild or less than mild aortic regurgitation during the mean follow-up period of 13 months. Postoperative echocardiograms showed excellent peak pressure gradients compared with preoperative echocardiograms. Postoperative cardiac computed tomography scans were performed in 6 patients. The discrepancies between the ring size used and postoperative annular size were <1-mm diameter in all patients. Conclusions This new flexible ring is easy to use to fix an aortic annulus from the inside. Early results reveal excellent control of aortic regurgitation with the projected annular size. Further investigations are needed to ensure the effectiveness of the ring.

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26

Guo, Fuchen, Ke Li, Jiaxin Wu, Linli He, and Linxi Zhang. "Effects of Topological Constraints on Penetration Structures of Semi-Flexible Ring Polymers." Polymers 12, no. 11 (November 11, 2020): 2659. http://dx.doi.org/10.3390/polym12112659.

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The effects of topological constraints on penetration structures of semi-flexible ring polymers in a melt are investigated using molecular dynamics simulations, considering simultaneously the effects of the chain stiffness. Three topology types of rings are considered: 01-knot (the unknotted), 31-knot and 61-knot ring polymers, respectively. With the improved algorithm to detect and quantify the inter-ring penetration (or inter-ring threading), the degree of ring threading does not increase monotonously with the chain stiffness, existing a peak value at the intermediate stiffness. It indicates that rings interpenetrate most at intermediate stiffness where there is a balance between coil expansion (favoring penetrations) and stiffness (inhibiting penetrations). Meanwhile, the inter-ring penetration would be suppressed with the knot complexity of the rings. The analysis of effective potential between the rings provides a better understanding for this non-monotonous behavior in inter-ring penetration.

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27

Liang, Yongli, and Lizhong Xu. "Free Vibration for an Electromagnetic Harmonic Movable Tooth Drive System." Open Mechanical Engineering Journal 9, no. 1 (February 10, 2015): 15–21. http://dx.doi.org/10.2174/1874155x01509010015.

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The authors proposed an electromagnetic harmonic movable tooth drive system which is an electromechanical coupled system where the coupled dynamics controls its overall operating behavior. However, the coupled dynamics of such a system was not found in the literature. In this paper, an electromechanical coupled dynamics equation of the flexible ring subjected to electromagnetic force is presented. Using the equation, the natural frequencies and vibration modes of the flexible ring are investigated. The results show that the natural frequency of the drive system is affected by mechanical and electrical parameters among which, the coil current, the average static displacement of the flexible ring and the air gap have more obvious influence on the natural frequencies. The results are useful for the design and further study of the dynamics performance for the drive system.

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28

Kim, Yeongin, Alex Chortos, Wentao Xu, Yuxin Liu, Jin Young Oh, Donghee Son, Jiheong Kang, et al. "A bioinspired flexible organic artificial afferent nerve." Science 360, no. 6392 (May 31, 2018): 998–1003. http://dx.doi.org/10.1126/science.aao0098.

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The distributed network of receptors, neurons, and synapses in the somatosensory system efficiently processes complex tactile information. We used flexible organic electronics to mimic the functions of a sensory nerve. Our artificial afferent nerve collects pressure information (1 to 80 kilopascals) from clusters of pressure sensors, converts the pressure information into action potentials (0 to 100 hertz) by using ring oscillators, and integrates the action potentials from multiple ring oscillators with a synaptic transistor. Biomimetic hierarchical structures can detect movement of an object, combine simultaneous pressure inputs, and distinguish braille characters. Furthermore, we connected our artificial afferent nerve to motor nerves to construct a hybrid bioelectronic reflex arc to actuate muscles. Our system has potential applications in neurorobotics and neuroprosthetics.

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29

Zhao, Yun Wei, De Xu Geng, Xiao Min Liu, Guang Bin Wu, and Hong Bo Liu. "Study on the Performance of Pneumatic Planar Bending Flexible Joint with Different Boundary Conditions." Applied Mechanics and Materials 727-728 (January 2015): 827–30. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.827.

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In this paper, we develop a new type planar bending flexible joint adopting rubber tube and elastic constraint components. When supplied the air pressure, the joint can elongate in axial direction or bend arbitrarily in the planar. Experiments study on contrast of mechanical character of planar bending flexible joint in different restrained conditions are done on the static experimental device, and the influence of the structure of constraints ring on the elongation and the bending angle of the joint. The experiments show that the deformation of the joint with arc-shaped restraints ring significantly larger than the joint with cylindrical-shaped restraints ring.

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Bait-Suwailam, Mohammed M., Thamer S. Almoneef, and Saud M. Saeed. "FLEXIBLE METAMATERIAL ELECTROMAGNETIC HARVESTER USING MODIFIED SPLIT-RING RESONATOR." Progress In Electromagnetics Research M 95 (2020): 135–44. http://dx.doi.org/10.2528/pierm20051407.

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31

Lee, Sang Hyeop, Hyo Seo Kwak, Hansaem Seong, Chang Ryeol Lee, and Chul Kim. "Design of Plate Spring Used in Flexible Packing Ring." Transactions of the Korean Society of Mechanical Engineers - A 42, no. 3 (March 31, 2018): 247–54. http://dx.doi.org/10.3795/ksme-a.2018.42.3.247.

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Izutani, Hironori, Dairoku Nishikawa, Yasuhiko Kubota, and Noriyuki Kashiyama. "Beating-Heart Tricuspid Annuloplasty Using the Tailor Flexible Ring." Asian Cardiovascular and Thoracic Annals 18, no. 5 (October 2010): 489–90. http://dx.doi.org/10.1177/0218492310379940.

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Ragi, P. Menon, K. S. Umadevi, Paul Nees, Jovia Jose, M. V. Keerthy, and V. P. Joseph. "Flexible split-ring resonator metamaterial structure at microwave frequencies." Microwave and Optical Technology Letters 54, no. 6 (March 20, 2012): 1415–16. http://dx.doi.org/10.1002/mop.26814.

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34

Bartenev, V. N., N. G. Kameneva, and A. A. Lipanova. "A statistical stereochemical model of the flexible furanose ring." Acta Crystallographica Section B Structural Science 43, no. 3 (June 1, 1987): 275–80. http://dx.doi.org/10.1107/s010876818709788x.

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35

Johansson, B. S., C. R. Batchellor, and L. Egnell. "Flexible bus: A self-restoring optical ADM ring architecture." Electronics Letters 32, no. 25 (1996): 2338. http://dx.doi.org/10.1049/el:19961591.

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36

Stanistreet, T. F., J. M. Allwood, and A. M. Willoughby. "The design of a flexible model ring rolling machine." Journal of Materials Processing Technology 177, no. 1-3 (July 2006): 630–33. http://dx.doi.org/10.1016/j.jmatprotec.2006.03.228.

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37

Tiedemann, Ingo, Gerhard Hirt, Reiner Kopp, Dennis Michl, and Nastaran Khanjari. "Material flow determination for radial flexible profile ring rolling." Production Engineering 1, no. 3 (July 4, 2007): 227–32. http://dx.doi.org/10.1007/s11740-007-0030-z.

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38

Li, Bin, Xiaobo Yang, James Yang, Yunqing Zhang, and Zeyu Ma. "In-Plane Flexible Ring Tire Model—Part 2: Parameterization." Tire Science and Technology 46, no. 3 (July 1, 2018): 220–40. http://dx.doi.org/10.2346/tire.18.460304.

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ABSTRACT The flexible ring tire model has recently gained significant attention in vehicle dynamics and analysis of road loads because it is able to capture the tire belt deflection under various driving conditions and compute more efficiently than the complex finite element tire model. This article presents the second part of the in-plane flexible ring tire model study with the recently developed flexible ring tire model to investigate several important aspects about tire model parameterization. First, we use the FTire® model in the MSC ADAMS/View® virtual test rig to generate five sets of spindle longitudinal and vertical loads on cleats with different heights, static loads, and speeds. These spindle loads are considered the “experimental data” in view of proving the accuracy of the commercial FTire® model that can accurately predict the spindle loads, especially in well-controlled test rigs. Next, one set of tire model parameters identified with a specific cleat test case is applied to other cleat test cases to predict the tire spindle forces, which are then compared with those corresponding experimental data. Similarly, this process is repeated for each cleat test case to yield different sets of parameters, respectively. Afterward, the predicted spindle loads are compared with the experimental data, respectively, based on SAE Standard J2812, and the predicted errors are assessed to determine which cleat test case is the best choice to identify parameters of the tire model. Finally, the effects of the belt point number and tread block number on the prediction accuracy and efficiency are discussed.

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Dolgikh, D. V., and V. V. Kiselev. "Corrugation of a flexible ring under external hydrostatic compression." Journal of Applied Mathematics and Mechanics 74, no. 2 (January 2010): 204–13. http://dx.doi.org/10.1016/j.jappmathmech.2010.05.011.

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An, Jichul, and Hwayong Kim. "Equation of state for Lennard–Jones flexible ring fluids." Fluid Phase Equilibria 219, no. 1 (May 2004): 61–65. http://dx.doi.org/10.1016/j.fluid.2004.01.016.

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Zhu, Hai-Lin, Jun Pan, Min Zou, Hong-Nen Wu, and Xingpei Qin. "WHICH WILL WIN IN THE GEAR PUMP TECHNOLOGY." Transactions of the Canadian Society for Mechanical Engineering 37, no. 1 (March 2013): 129–34. http://dx.doi.org/10.1139/tcsme-2013-0008.

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There exist three major problems in current gear pumps. They are unbalanced radial force, big excessive flow pulsation and short working life. In order to solve the problems above, a new type of gear pump with flexible ring gear is introduced. Pumping action is achieved through meshing between a flexible ring gear and a rigid external gear. Thus radial pressure forces are hydraulically balanced and the volumetric displacement is doubled for the new pump.

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Liu, Zhihao, Qinhe Gao, and Hailong Niu. "Development of the Flexible Ring on an Elastic Continuous Foundation Tire Model for Planar Vibration of the Heavy Load Radial Tire." Applied Sciences 8, no. 11 (October 25, 2018): 2064. http://dx.doi.org/10.3390/app8112064.

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This paper investigates the planar vibration characteristic of heavy load radial tires with a large flat ratio. A proposed tire model with a flexible ring on an elastic continuous foundation is investigated utilizing kinematic modeling and experimental modal analysis. Planar coupling deformation of the radial and tangential direction is considered to enrich the kinematic characteristic of the flexible belt and the continuous sidewall; a flexible ring on an elastic continuous foundation tire model is proposed to investigate the coupling vibration characteristic between the flexible belt and the continuous sidewall. In-extensibility assumption is utilized to simplify the proposed tire model and the planar vibration modal features of the heavy load radial tire are discussed. The variation of the inflation pressure on the radial and tangential stiffness of the sidewall spring model is enriched into the flexible ring on an elastic continuous foundation tire model to extend the modal prediction of the tires with a different inflation pressure. Taking the relative error between the experimental and analytical modal resonance frequency of the tested tire with a different inflation pressure as the object value, structural parameters of the proposed tire model are identified by a backward genetic algorithm. Experimental and theoretical results show that: the planar coupling vibration characteristic of the heavy load radial tire can be predicted precisely with the flexible ring on an elastic continuous foundation tire model; meanwhile, considering the linear variations of the radial and tangential sidewall stiffness due to the inflation pressure, the proposed tire model can be extended to analyze the vibration characteristic of the heavy load radial tire with a different inflation pressure.

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Zhang, Jun, Yi Min Song, and Jin You Xu. "A Discrete Lumped-Parameter Dynamic Model for a Planetary Gear Set with Flexible Ring Gear." Applied Mechanics and Materials 86 (August 2011): 756–61. http://dx.doi.org/10.4028/www.scientific.net/amm.86.756.

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A discrete lumped-parameter model for a general planetary gear set is proposed, which models the continuous flexible ring gear as discrete rigid ring gear segments connected with each other through virtual springs. The ring-planet mesh is analyzed to derive equations of motion of ring segments and planet. By assembling equations of motion of each individual component, the governing equations of planetary gear system are obtained. The solution for eigenvalue problem yields to natural frequencies and corresponding vibration modes. The simulations of example system reveal that the ring gear flexibility decreases system lower natural frequencies and the vibration modes can be classified into rotational, translational, planet and ring modes.

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Yu, Zhixiang, Chun Liu, Liping Guo, Lei Zhao, and Shichun Zhao. "Nonlinear Numerical Modeling of the Wire-Ring Net for Flexible Barriers." Shock and Vibration 2019 (October 13, 2019): 1–23. http://dx.doi.org/10.1155/2019/3040213.

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To investigate the nonlinear mechanical behavior of the wire-ring net, this paper presents a new numerical model that can collectively consider equivalence between numerical and actual wire rings. Quasi-static tests, including tensile tests on steel wires and one-ring specimens, and puncturing tests on net specimens were conducted. Based on the test results, the axial constitutive curves of steel wires were obtained. The linear correlation equations for the breaking loads of the one-ring specimens and the puncturing strength of wire-ring nets were established, both of which were related to the number of windings. The wire rings were modeled via an equivalent structure with a single winding and a circular cross section. Equivalence between the numerical and actual wire rings in terms of bending and tensile strength, total mass, contact with sliding friction, and rupture behavior were also derived and presented. In particular, the emphasis was on simulating the flattening effect, a phenomenon rarely accounted for in conventional numerical models. All dominant factors were reflected in a model with the material law by the input of material parameters. The proposed mechanical model was calibrated and verified by the data from the tests of the wire-ring net. The calibrated mechanical model is also shown to successfully simulate a full-scale test of a flexible rockfall protection barrier according to the ETAG027 standard.

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Zhang, Xiao Guang, Yu Liu, Jun Xue Ren, and Jing Xian Yang. "Solid Rocket Motor Nozzle Flexible Joint Design and Fabrication." Advanced Materials Research 631-632 (January 2013): 905–9. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.905.

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Design and fabrication of a tactical motor nozzle flexible joint were accomplished in this paper. The miniature flexible joint configuration characteristics were analyzed. The silicone rubber was selected as the elastomer ring material based on the mechanical properties test. Individual reinforcement and elastomer rings were assembled to form the flexible joint by transfer molding. Test results indicate that the flexible joint meet the performance requirements.

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Титоренко, Александр, and Aleksandr Titorenko. "Options of Configuration of Anti-mudflow Constructions with Application of Flexible Ring Grids." Construction and Architecture 1, no. 1 (May 1, 2013): 43–48. http://dx.doi.org/10.12737/340.

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Титоренко, Александр, and Aleksandr Titorenko. "Loadings and Influences of the Debris Flow on Flexible Anti-mudflow Constructions." Construction and Architecture 1, no. 1 (May 1, 2013): 38–42. http://dx.doi.org/10.12737/339.

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Shock impact of the head of mudflow on flexible anti-mudflow constructions, diagrams of loadings are shown. Estimated dependences are offered for determination of geometrical parameters flexible anti-mudflow constructions and tension and tension in a ring grid and anchors.

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XU, LIZHONG, and YAOWU LI. "LATERAL-FLEXURAL AND TORSIONAL VIBRATIONS OF FLEXIBLE RING FOR ELECTROMECHANICAL INTEGRATED ELECTROSTATIC HARMONIC ACTUATOR." International Journal of Structural Stability and Dynamics 09, no. 03 (September 2009): 391–409. http://dx.doi.org/10.1142/s0219455409003144.

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This paper presents an electromechanical coupled dynamic equation for the lateral-flexural and torsional vibrations of a flexible ring for an electromechanical integrated electrostatic harmonic actuator as well as the equation of the forced response of the electromechanical integrated electrostatic harmonic actuator to voltage excitation. By solving these equations, the natural frequency and vibration modes of the flexible ring for the actuator are investigated. Changes in the natural frequency with respect to the main system parameters are also examined and the dynamic responses of the actuator to voltage excitation obtained.

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Ren, Xiao bin, Kun Ren, Ying Zhang, Cheng guo Ming, and Qun Han. "Multiple Fano resonances with flexible tunablity based on symmetry-breaking resonators." Beilstein Journal of Nanotechnology 10 (December 11, 2019): 2459–67. http://dx.doi.org/10.3762/bjnano.10.236.

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A symmetry-breaking nanostructure is proposed to achieve multiple Fano resonances. The nanostructure consists of an asymmetric ring resonator coupled to a plasmonic waveguide. The broken symmetry is introduced by deviating the centers of regular ring. New resonant modes that are not accessible through a regular symmetric ring cavity are excited. Thus, one asymmetric cavity can provide more than one resonant mode with the same mode order. As a result, the interval of Fano resonances is greatly reduced. By combining different rings with different degrees of asymmetry, multiple Fano resonances are generated. Those Fano resonances have different dependences on structural parameters due to their different physical origin. The resonance frequency and resonance peak number can be arbitrarily adjusted by changing the degree of asymmetry. This research may provide new opportunities to design on-chip optical devices with great tuning performance.

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Li, Bin, Xiaobo Yang, and James Yang. "In-Plane Flexible Ring Tire Model Parameter Identification: Optimization Algorithms." SAE International Journal of Vehicle Dynamics, Stability, and NVH 2, no. 1 (May 3, 2018): 71–87. http://dx.doi.org/10.4271/10-02-01-0005.

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Journal articles on the topic 'Flexible ring'

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