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Journal articles on the topic 'Roller support'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

DeBruyne, Danielle M., Marina M. Dewhurst, Katelyn M. Fischer, Michael S. Wojtanowski, and Chris Durall. "Self-Mobilization Using a Foam Roller Versus a Roller Massager: Which Is More Effective for Increasing Hamstrings Flexibility?" Journal of Sport Rehabilitation 26, no. 1 (2017): 94–100. http://dx.doi.org/10.1123/jsr.2015-0035.

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Clinical Scenario:Increasing the length of the muscle–tendon unit may prevent musculotendinous injury. Various methods have been proposed to increase muscle–tendon flexibility, including self-mobilization using foam rollers or roller massagers, although the effectiveness of these devices is uncertain. This review was conducted to determine if the use of foam rollers or roller massagers to improve hamstrings flexibility is supported by moderate- to high-quality evidence.Clinical Question:Are foam rollers or roller massagers effective for increasing hamstrings flexibility in asymptomatic physica

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2

Danilin, Oleksandr, Stefan Zaichenko, Stepan Shevchuk, Natalia Jukova, and Ivan Pasichniuk. "DETERMINATION OF THE CHANGE OF THE DESIGN POSITION OF THE PROFILE OF THE BELT CONVEYOR ON THE LOAD OF THE ROLLER BEARINGS." Geoengineering, no. 3 (December 14, 2020): 20–25. http://dx.doi.org/10.20535/2707-2096.3.2020.219324.

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The article attempts to establish the basic patterns in the formation of loads in the structure of the conveyor frame due to changes in the design position of the constituent elements based on analytical calculations. The amortization replacement of rollers and the establishment of a change in the projected resource caused the change in the design position.The aim of the work is to study the interaction of the elements of the belt conveyor on the convex region of the profile when the design position changes and to determine the change in the resource of the roller support elements. The purpose

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3

Park, Cheol Hoon, Tae Gwang Yoon, Dongwoo Kang, and Hugo Rodrigue. "High-Precision Roller Supported by Active Magnetic Bearings." Applied Sciences 9, no. 20 (2019): 4389. http://dx.doi.org/10.3390/app9204389.

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Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap. In this study, the rotational vibration of a roller was minimized using magnetic bearings, and a precision roller capable of automatic alignment using the position control function of magnetic bearings was proposed. A rotation accuracy of approximately 4.6 μm (peak-to-peak) was observed, even under a rotation of 30 rev/min and a radial force load of 300 N. The rotor position control experiment for magnetic

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4

Wang, Xiao Gang, Xiang Nan Li, and Qing Xue Huang. "Research on Force Simulation of Rolls' Deformation in the Rolling Process of Medium and Heavy Plate Leveler." Applied Mechanics and Materials 143-144 (December 2011): 517–21. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.517.

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During many factors affect the straightening precision, the shape of roller gap affect directly the flatness and the distribution of residual stress; At the same time, roll system's stiffness, as an important part of the roller leveler's whole stiffness, affect directly the design of leveling production process. In order to draw the conclusion of deformation characteristics and rules, the equivalent FEM Model on upper rolls and its support structure and investigates on the features of stress and strain after the rollers' deformation is established, based on the structural analysis of hot rolle

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5

Safronov, Ye V., and A. L. Nosko. "Experimental evaluation of the load capacity of the rollers of gravity conveyors for pallets." Izvestia MGTU MAMI 1, no. 3 (2020): 59–64. http://dx.doi.org/10.31992/2074-0530-2020-45-3-59-64.

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The main approaches to calculating the load capacity of the carrying rollers of gravity conveyors are presented. It is shown that in practice, in the designs of modern non-driven conveyors for pal-lets, the priority when choosing the pitch of the carrier rollers is the stability of the movement of the load, rather than minimizing the number of rollers. In connection with the urgent task of reducing the metal consumption and the cost of gravity roller conveyors for pallets, the purpose of the work is to experimentally determine the load capacity of the rollers of gravity conveyors for pallets w

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6

Listova, M. A., V. V. Dmitrieva, and P. E. Sizin. "Reliability of the belt conveyor bed when restoring failed roller supports." IOP Conference Series: Earth and Environmental Science 942, no. 1 (2021): 012002. http://dx.doi.org/10.1088/1755-1315/942/1/012002.

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Abstract The reliability of modern belt conveyors, whose length reaches tens of kilometers, is primarily determined by the reliability of the roller supports that support the belt and ensure its movement. As they wear out, some roller bearings fail and need to be repaired or replaced. The dynamics of the number of working roller supports is determined by the system of Kolmogorov equations. Their solution allows us to find the probabilities of finding the system in states with a different number of working elements. The article finds probabilities for two cases. In the first case, when restorin

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7

Zheng, Jingyang, Jinchen Ji, Shan Yin, and Van-Canh Tong. "Fatigue life analysis of double-row tapered roller bearing in a modern wind turbine under oscillating external load and speed." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 15 (2020): 3116–30. http://dx.doi.org/10.1177/0954406220911966.

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Fatigue life analysis of roller bearing is usually performed for bearings under constant rotating speed and invariant loading conditions. For the bearings used in offshore floating direct-drive wind turbines, they often experience oscillating motions with varying loading patterns, for which the standard fatigue life analysis is not valid due to the presence of fluctuating loads. This paper presents the fatigue life analysis of a double-row tapered roller bearing under oscillating external load and speed conditions, which is used to support the main shaft of a large modern direct-drive wind tur

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8

Cao, Shunxin, Ruijun Zhang, Shuohua Zhang, Shuai Qiao, Dongsheng Cong, and Mingxiao Dong. "Roller–rail parameters on the transverse vibration characteristics of super-high-speed elevators." Transactions of the Canadian Society for Mechanical Engineering 43, no. 4 (2019): 535–43. http://dx.doi.org/10.1139/tcsme-2018-0083.

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Interaction and wear between wheel and rail become increasingly serious with the increase in elevator speed and load. Uneven roller surface, eccentricity of rollers, and the looseness of rail brackets result in serious vibration problems of high-speed and super-high-speed elevators. Therefore, the forced vibration differential equation representing elevator guide rails is established based on Bernoulli–Euler theory, and the vibration equation of the elevator guide shoes and the car is constructed using the Darren Bell principle. Then, the coupled vibration model of guide rail, guide shoes, and

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9

Bakhshi, Nima, and Mehdi Hojjati. "Effect of compaction roller on layup quality and defects formation in automated fiber placement." Journal of Reinforced Plastics and Composites 39, no. 1-2 (2019): 3–20. http://dx.doi.org/10.1177/0731684419868845.

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Application of automated fiber placement is limited by defects formed in the prepreg tows during the layup process. An extensive experimental study is performed to investigate the effect of compaction roller on the quality of the layup. Five different compaction rollers with different stiffness and architectures were manufactured and employed to dispense prepreg tows at various process conditions. Layup quality was examined and different defects including tow buckling and blister were identified. In addition to automated fiber placement trials, static testing and finite element simulations wer

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10

Simisinov, D. I., A. I. Afanas’ev, and N. G. Valiev. "Reducing the load on the roller bit support." Mining informational and analytical bulletin, no. 11-1 (2021): 197–208. http://dx.doi.org/10.25018/0236_1493_2021_111_0_197.

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11

Sun, Li Gen, Hui Rong Li, and Jia Quan Zhang. "Minimum Mould Exit Shell Thickness of Round Blooms for Peritectic Steel Casting." Advanced Materials Research 421 (December 2011): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amr.421.179.

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The minimum mould exit shell thickness (MEST) is one of key factors to consider for continuous casting machine design and the strand cooling schemes. Based on the shell strength at elevated temperatures, a concept of shell integral average strength, from its very top surface to the solidus frontier, has been introduced to judge its bulging tendency under ferrostatic pressure. Considering the contribution to the shell stability, a mathematic model for the determination of the minimum MEST has been brought forward. It is shown that, the minimum MEST of the round bloom is decided by not only the

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12

Huang, Yi Lei, Guang Xun Wang, Han Chao He, and Jing Zhang. "A Research on Automatic Detection Device for the Missing of the Roller Chain's Rollers and Sleeves." Advanced Materials Research 898 (February 2014): 638–43. http://dx.doi.org/10.4028/www.scientific.net/amr.898.638.

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The set of automatic detection device for the parts missing of the roller chains rollers and sleeves is based on the displacement transfer theory of the lever mechanism and combined with the integration of PLC control. The levers one end is the detection head close to the roller chain and the other end is the induction head, its support is placed on the base. Sensor puts the induction information into the PLC, and then the PLC make the Synthetic judgment to control the chains drive mechanism to slow down and marking on the places that have missing some parts on time. Its a device has high reli

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13

Burlakov, Yu V. "Using the roller threshing device for threshing fiber flax." Siberian Herald of Agricultural Science 50, no. 6 (2020): 115–23. http://dx.doi.org/10.26898/0370-8799-2020-6-13.

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The ways of increasing efficiency of the factory technology for harvesting fiber flax with threshing stem band from the rolls were studied. The experiment was carried out in stationary conditions with a moisture content of the source material of no more than 16%. A roller threshing device was proposed for separating the seed part of the crop from the stem before feeding stems into the fiber production line. The device ensures threshing of the fiber flax stem band over its entire width without using a separate clamping conveyor. The places where the seed heap descends from the roller threshing

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14

Gibbons, Timothy J., and Marie-Louise Bird. "Exercising on Different Unstable Surfaces Increases Core Abdominal Muscle Thickness: An Observational Study Using Real-Time Ultrasound." Journal of Sport Rehabilitation 28, no. 8 (2019): 803–8. http://dx.doi.org/10.1123/jsr.2017-0385.

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Background: The training of abdominal muscles has a positive impact on the functional capacity of healthy adults, being applied practically in fields of athletics and fitness through rehabilitation for lower back pain. Objective: The study compares abdominal muscle activity while performing graded isometric exercises on stable and unstable surfaces. The authors also examined perceived stability and comfort for the different surfaces. Methods: A total of 30 young, healthy adults performed 3 graded isometric exercises on a Pilates table, foam roller, and Oov (a newly developed tool). Ultrasound

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15

Yin, Ming, and Li Zhong Wang. "Fracture Reason Analysis of Coal Compactor Roller Shaft." Advanced Materials Research 490-495 (March 2012): 2323–27. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2323.

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The cause of the fatigue fracture of the coal compactor roller shaft is analyzed in this paper. By means of investigating the macro-fracture and micro-fracture analysis for the shaft roller, and use ANSYS software to simulate the fatigue stress to find out the reasons of the roller shaft fracture and thus provides theoretical support for further optimizing the design of the roller shaft structure.This lied a solid foundation for how to improve the designation of roller shaft and how to improve the lifespan of the roller shaft

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16

Powell, N. N., and C. Andrew. "Incremental Forming of Flanged Sheet Metal Components Without Dedicated Dies." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 206, no. 1 (1992): 41–47. http://dx.doi.org/10.1243/pime_proc_1992_206_054_02.

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This paper describes research that has investigated a process for forming flanged sheet metal parts without dedicated tooling by repeated localized deformation—an incremental process. The complete formation of a shrink flange over a former by a grooved roller, moving around the flange in a series of passes, is analysed by the finite element method and reasonable agreement with experimental results shown. Some evidence is presented that the use of a grooved roller can extend the forming limits of a conventional single die pressing operation. The predicted reaction distribution at the fixed edge

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17

Song, Yan Ming, and Yang Yang. "Hydrostatic Support Design of Cooling Copper Roller with Inner Pressure Feedback in Forming Amorphous Ribbon." Applied Mechanics and Materials 364 (August 2013): 46–51. http://dx.doi.org/10.4028/www.scientific.net/amm.364.46.

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Cooling copper roller is the key technology and equipment to amorphous ribbon forming. Rolling bearing support is difficult to obtain high rotation accuracy. A new inner pressure feedback hydrostatic journal bearing is proposed with different recess area. The load capacity and film stiffness mathematical model of hydrostatic journal bearing are established. The Inner pressure feedback hydrostatic journal bearing with different recess area at the diameter of 200mm is designed and manufactured for amorphous ribbon cooling copper roller support structure. The operation tests demonstrate that the

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18

Mlambo, S., C. L. Sole, and C. H. Scholtz. "Phylogeny of the African ball-rolling dung beetle genus Epirinus Reiche (Coleoptera:Scarabaeidae:Scarabaeinae)." Invertebrate Systematics 25, no. 3 (2011): 197. http://dx.doi.org/10.1071/is10032.

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Recent phylogenetic analyses have pointed to the dung beetle genus Epirinus as the putative African ancestral roller group. Consequently, we tested the roller status of species in the genus with observational studies and constructed a molecular phylogeny based on partial sequences of two mitochondrial and two nuclear genes for 16 of 29 species. Tested species were confirmed to be dung rollers. Monophyly of the genus was confirmed, lending support to the synonymy of the wingless genus Endroedyantus with Epirinus. Moreover, the phylogenetic hypothesis was found to have a similar topology with a

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19

Polyblank, James A., and Julian M. Allwood. "Support Roller Control and Springback Compensation in Flexible Spinning." Procedia Engineering 81 (2014): 2499–504. http://dx.doi.org/10.1016/j.proeng.2014.10.357.

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20

Wang, Hui, Min Hui Tong, and Pei Zheng. "Research on Contact Strength between Roller Screw Pair on Hoisting Mechanism Applied in Deep Sea Crane." Applied Mechanics and Materials 423-426 (September 2013): 2001–5. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.2001.

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Roller screw pair is the major part of the rope guiding device that used in deep-sea hoisting mechanism. This paper focuses on the contact problems of the roller screw pair. The hoisting mechanism used in the deep sea engineering has the rope with large diameter, sustaining the great rope tension force. So its important to research the contact stress of the roller screw, This paper study the impact of surface hardness of the roller on the performance of the roller screw, sums up the effect of hardness on the bearing capacity of the roller, and provides the theoretical support and references fo

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21

Ivanović, Gradimir, Radivoje Mitrovic, and Dragan Jovanovic. "Reliability of Transportation Belt Rollers Used in Surface Coal Digging." Advanced Materials Research 633 (January 2013): 312–21. http://dx.doi.org/10.4028/www.scientific.net/amr.633.312.

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Transport of ground and coal at the surface coal dig in Kostolac, Serbia, is done using transportation belts (3 - 5 kilometres in length) using the systems of BTR (Bagger-Transporter-Remover) and BTM (Bagger-Transporter-Mill). The transporter belt during circular movement is suspended on carry-rollers (during transport of weight) and on support-rollers (without weight). Two or three carry-rollers, or three support-rollers make a garland. Garlands (5 carry and 3 supporting) are built into a section and they enable the movement of belt over them. The number of sections depends on the transportat

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22

Pavlidis, Adele, and Wendy O’Brien. "Sport and feminism in China: On the possibilities of conceiving roller derby as a feminist intervention." Journal of Sociology 53, no. 3 (2017): 704–19. http://dx.doi.org/10.1177/1440783317721349.

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The spread of contemporary roller derby presents an opportunity to examine the ways sport can act as a form of feminist intervention. This article draws on a qualitative case study of a roller derby league in China, made up predominantly of expatriate workers, to explore some of the possibilities roller derby presents in activating glocal forms of feminist participatory action. The globalization of sport has often been associated with colonialism and the loss of local physical cultures, together with commercialization. Roller derby provides a very different case, where, together with the sprea

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23

Antipin, Dmitriy, Vladimir Vorob'ev, Maksim Maslov, and Vadim Korchagin. "DEVICE FOR RESEARCHES OF MAGNETIC FIELD IMPACT UPON “WHEEL-RAIL” FRICTION PAIR CHARACTERISTICS." Bulletin of Bryansk state technical university 2020, no. 1 (2020): 34–39. http://dx.doi.org/10.30987/1999-8775-2020-2020-1-34-39.

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The paper is dedicated to the circuit diagram substantiation of the specialized roller bench for researches of the magnetic field impact upon wheel adhesion with a rail. On the basis of the analysis of the experimental plants available at present for the study of the contact interaction of wheels with rails it is defined that two-roller benches are the most efficient for the investigation of different outer factors impact upon wheel adhesion with a rail. Taking into account mentioned above there is offered an original design of the two-roller bench equipped with the device for friction area ma

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24

Tilloev, K. Z., and S. V. Kondakov. "METHOD OF CALCULATION THE STABILITY OF AN EXCAVATOR EQUIPPED WITH A CONE ROLLER." Spravochnik. Inzhenernyi zhurnal, no. 294 (September 2021): 12–16. http://dx.doi.org/10.14489/hb.2021.09.pp.012-016.

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The construction and method of calculating the stability of a crawler excavator equipped with a new working body (cone roller) are considered. The calculation is made on two working positions (longitudinal and transverse) of the excavator, provided that the excavator must apply the maximum force on the working body at an angle of 90°. The force applied by the excavator boom to the cone roller during the introduction depends on the physical and mechanical properties of the compacted soil. The calculation method differs in that during the compaction of the roadbed, the cone sinks into the ground

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25

Wei, Yan Gang, and Yan Kui Liu. "Finite Element Analysis of the Roller Bearing Used in Rolling Mill." Applied Mechanics and Materials 367 (August 2013): 141–44. http://dx.doi.org/10.4028/www.scientific.net/amm.367.141.

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The loading roller number and maximum stress of the bearings can not be calculated accurately through conventional methods because support manner of the roller bearings used in rolling mill is different from that of the roller bearings used in conventional condition. Based on characteristic of the bearings, the model of the bearing is made combining contact mechanics with finite element method. The loading roller number and maximum stress of the bearings are calculated through FEA. The work of this paper offers a reference to design and manufacture this kind of bearings.

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26

Deák, Krisztián, and Imre Kocsis. "Support Vector Machine with Wavelet Decomposition Method for Fault Diagnosis of Tapered Roller Bearings by Modelling Manufacturing Defects." Periodica Polytechnica Mechanical Engineering 61, no. 4 (2017): 276. http://dx.doi.org/10.3311/ppme.10802.

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Tapered roller element bearings are generally applied in machines and transmission gearboxes. In manufacturing outer ring, inner ring and the rollers usually suffer damages. It is a challenging task to reveal and classify the defects. This paper presents an efficient method for fault classification by support vector machines. The faults on the bearing parts created by laser beam machine have similar shape and surface topography as the grinding faults from the manufacturing process. Vibration signature is collected by sensitive transducer and high resolution data acquisition unit. A test-rig is

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27

Zhao, Xue You, Zhi Chao Lang, Chun Feng Mao, and Wei Na Zhang. "Analysis on Crack Propagation of Roll by the Finite-Element." Advanced Materials Research 591-593 (November 2012): 553–56. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.553.

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Roller is a main tool and consumption parts for steel rolling. With analysis test on the fatigue property of roller, the development incentives of crack propagation were realized, the service life of roller was improved and the cost of Production was reduced in a large extent. Roller is a circular column, which do fixed-axis rotation under combined action of roll pressure, bearing reaction, Support roller reaction force and torsion. The failure types of roll such as flaking, fracture and crack. Simulate and analysis on damage of the roller crack by the fracture mechanics of knowledge and ANSYS

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28

Chen, Yang, Longsheng Lu, Xiaokang Liu, Yingxi Xie, Zhenping Wan, and Zhaorui Hou. "Comparative investigation of carbon fiber filaments in off-axis transverse cutting between flexible-support and non-support method under pre-tension." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501983781. http://dx.doi.org/10.1177/1558925019837812.

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Short carbon fiber is an effective and essential reinforced material in composite domains. Generally, it is produced by chopping technology, among which pressing roller and grooved wheel are two popular chopping techniques. According to the working principle of these two techniques, the pressing roller can be simplified as a flexible-support cutting in off-axis transverse cutting, meanwhile the grooved wheel can be represented by a non-support cutting. To reveal the fracture difference of carbon fiber between the pressing roller and the grooved wheel technique, comparative investigation of fai

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29

Nozdrzykowski, Krzysztof, Zenon Grządziel, and Paweł Dunaj. "Analysis of Contact Deformations in Support Systems Using Roller Prisms." Materials 14, no. 10 (2021): 2644. http://dx.doi.org/10.3390/ma14102644.

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This article presents the results of finite element analyses of the influence of reaction forces on stresses and strains at the contact points of the rollers of prism supports with cylindrical surfaces of the main journals of large-sized crankshafts. The analyses of strains and stresses, as well as the depth of their occurrences, in the case of the shaft journal and support rollers were carried out using Hertz contact theory and the finite element method. These calculation results proved to be highly consistent. Additionally, they provide a basis for stating that, in the case under considerati

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30

Volsky, V. A., and R. V. Kotsyubansky. "Development of a structural and functional diagram of an aggregate for grinding and incorporating coarse stem plant residues into the soil." Mehanization and electrification of agricultural, no. 12 (2020): 36–43. http://dx.doi.org/10.37204/0131-2189-2020-12-4.

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Annotation Purpose. Increasing the efficiency of crushing operations and embedding coarse-stem plant residues into the soil due to the improvement of the technological process using a combined unit containing a crusher roller, disc working bodies and a compactor roller. Methods. The research was carried out using synthesis analysis, correlation-regression analysis, which makes prediction of the output quality and energy indicators for certain operating conditions and certain parameters of the combined machine for processing corn stubble. The rational values of design parameters and operating m

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31

Ao, HungLinh, Junsheng Cheng, Kenli Li, and Tung Khac Truong. "A Roller Bearing Fault Diagnosis Method Based on LCD Energy Entropy and ACROA-SVM." Shock and Vibration 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/825825.

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This study investigates a novel method for roller bearing fault diagnosis based on local characteristic-scale decomposition (LCD) energy entropy, together with a support vector machine designed using an Artificial Chemical Reaction Optimisation Algorithm, referred to as an ACROA-SVM. First, the original acceleration vibration signals are decomposed into intrinsic scale components (ISCs). Second, the concept of LCD energy entropy is introduced. Third, the energy features extracted from a number of ISCs that contain the most dominant fault information serve as input vectors for the support vecto

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Chen, Hongyue, Kun Zhang, Mingbo Piao, Xin Wang, Jun Mao, and Qiushuang Song. "Virtual Simulation Analysis of Rigid-Flexible Coupling Dynamics of Shearer with Clearance." Shock and Vibration 2018 (2018): 1–18. http://dx.doi.org/10.1155/2018/6179054.

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A model for virtual simulation analysis of the rigid-flexible coupling of a shearer has been developed with the objective of addressing problems associated with lifetime mismatch and low reliability of pin rows of a scraper conveyor and the corresponding support mechanism of a shearer. Simulations were performed using the experimental roller load as stimulus. Results of the analysis demonstrate that the vertical cutting force on the roller serves to reduce the load on the plane support plates during shearer cutting, and the force on the right plane support plate is considerably smaller compare

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33

Chanmalai, Thanin, Byungik Chang, Kevin Misaro, Saron Hagos, and Thippesh Bethur Hanumanthareddy. "Development of a nomogram to predict the contact stress between an I-girder and a support roller." Engineering Solid Mechanics 9, no. 4 (2021): 377–90. http://dx.doi.org/10.5267/j.esm.2021.7.001.

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The incremental launching method (ILM) is an efficient method of bridge construction primarily suited for environmentally sensitive areas. However, during the bridge launching, there are significant contact stresses between the launching system and the steel bridge girders. These substantial contact stresses can cause damage both on, and just under, the girder surface. Although Hertz contact theory solutions may give an insight into the problem, the accuracy is uncertain due to the presence of complex geometries, loads, and material properties. The complicated structural systems need to rely o

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34

Fan, Xiao-bin, Yong Zang, Yuan-kui Sun, and Ping-an Wang. "Impact Analysis of Roller System Stability for Four-High Mill Horizontal Vibration." Shock and Vibration 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/5693584.

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In order to study the hot Compact Strip Production (CSP), four-high mill vibration characteristics, and vibration suppression method, the roller system structure stability was analyzed and calculated at first in the paper. And then, the mill stand gap was measured at field and its influence on roll transverse vibration was analyzed. The drum gear coupling effect on the roller system stability and the automatic balance conditions of the coupling transmission torque were studied; the influence of axial force caused by the roller cross on the system stability was analyzed. Finally, the roller tra

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35

Tuladhar, Raju, and Walter H. Dilger. "Effect of support conditions on seismic response of cable-stayed bridges." Canadian Journal of Civil Engineering 26, no. 5 (1999): 631–45. http://dx.doi.org/10.1139/l99-021.

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The seismic response of a cable-stayed bridge is the result of the interaction between the input earthquake characteristics and the bridge properties like mass, stiffness, and support conditions. The support type used for the deck at the towers of cable-stayed bridges is one of the important parameters that greatly influences the seismic response of the bridge. This is demonstrated in the present paper by study of the change in modal characteristics and seismic response of two cable-stayed bridges for different types of the support conditions. The first bridge has concrete towers and a steel d

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Sazambayeva Bayan Tokushevna,, Samogin Yuriy Nikolaevich,, Togizbayeva Baglan Bolsinovna,, et al. "IN REFERENCE TO THE RESEARCH OF PIPE BELT CONVEYOR." BULLETIN 6, no. 388 (2020): 19–27. http://dx.doi.org/10.32014/2020.2518-1467.178.

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The article considers the initial provisions of the research and design of conveyor transport that allows to transport bulk cargo in safety. At the same time, it is noted that there is a need for a harmless impact on the environment, especially in long-distance routes transporting with vertical and horizontal bends, as well as with a minimum number of reloading nodes. The review and analysis of the standard sizes of existing conveyors shows certain advantages of the technological nature of the pipe belt conveyor (PBC). The considered construction of PBC, in comparison with existing ones is for

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Scullion, Jane, and Cathy Bulley. "Taking a Health Perspective on Roller Derby: A Qualitative Exploration of Women’s Experiences." Women 2, no. 1 (2022): 15–28. http://dx.doi.org/10.3390/women2010002.

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Although far fewer women exercise regularly than men, one women-dominated sport growing in popularity internationally is roller derby. A limited number of predominantly US-based and qualitative studies have explored roller derby. This Scotland-based qualitative study explored reasons for women starting, continuing, and stopping participation in roller derby in order to inform people involved in promoting physical activity for health benefits. Semi-structured interviews with six participants from a Scottish women’s roller derby league were recorded and transcribed verbatim. Data analysis using

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Woo, Seongwoo, Dennis L. O’Neal, and Yimer Mohammed Hassen. "Process to Establish the Enhance of Fatigue Life of New Mechanical System Such as a Drawer by Accelerated Tests." Applied Sciences 12, no. 9 (2022): 4497. http://dx.doi.org/10.3390/app12094497.

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To extend the life of a mechanical system, parametric Accelerated Life Testing (ALT) is proposed as a procedure to identify design faults and reduce fatigue failure. It includes a derivation of generalized time to failure model by linear transport process and a sample size equation for the ALT. A refrigerator drawer was used as an example. After loading, the rail rollers broke and the center support was bent. Ribs were added to the center support and the rail roller support was extended. At the first ALT, the box cover failed near the intersection between the cover and body. The box was then m

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Yu, Ming Jin, Feng Ping Cao, Tong Qiang Xu, and Xu Yun Qiu. "Study on the Wheel Load Variation Simulation Method of Automobile ABS Performance Test Bench." Advanced Materials Research 479-481 (February 2012): 1433–37. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1433.

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A method of wheel load variation simulation for automobile ABS performance test bench is presented in the paper. To simulate the wheel load variation of the detected vehicle, the wheel placement angle on the rollers can be changed by adjusting the wheelbase between the ABS performance test bench’s two rollers, which support the same wheel. Equivalent wheel load is defined to reflect wheel load variation simulation, and the relationship among the equivalent wheel load, roller adhesion coefficient and wheel placement angle is also be analyzed. The simulation results show that the equivalent whee

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Smirnov, Andrii, and Tamara Mishchenko. "Determination of the loads on the rollers of the tubular belt conveyor." E3S Web of Conferences 109 (2019): 00096. http://dx.doi.org/10.1051/e3sconf/201910900096.

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The article presents methods for determining loads on rollers of a six-roll support of a tubular belt conveyor, based on the equilibrium laws of elastic cylindrical plates and shells filled with a freight. In this case, the forces acting on the rollers of the tubular conveyor are the sum of the forces caused by the weight and expansion of the bulk load, the weight and bend of the belt, as well as the inertial forces associated with the curvature and the deflection of the belt under the weight of the bulk load. The dynamic forces acting on the rollers as the belt moves are determined from the e

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Pandit, D., and S. M. Srinivasan. "Large Elasto-plastic Deflection of Thin Beams with Roller Support Contact." Procedia Engineering 173 (2017): 1079–84. http://dx.doi.org/10.1016/j.proeng.2016.12.188.

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Xu, Yun Jie. "Fault Diagnosis for Rolling Bearing Based on Genetic-SVM Classifier." Advanced Materials Research 199-200 (February 2011): 620–24. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.620.

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Fault diagnosis of roller bearings is very complex, so it is difficult to use the mathematical model to describe their faults. Whose developmental changes have dual trends of increase and fluctuation. In this study, support vector machine trained by genetic algorithm based on high frequency demodulation analysis is proposed to fault diagnosis of ball bearing. Genetic algorithm is used to determine training parameters of support vector machine in this model, which can optimize the support vector machine (SVM) an intelligent diagnostic model. The performance of the GSVM system proposed in this s

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Ghalamchi, Behnam, Jussi Sopanen, and Aki Mikkola. "Simple and Versatile Dynamic Model of Spherical Roller Bearing." International Journal of Rotating Machinery 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/567542.

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Rolling element bearings are essential components of rotating machinery. The spherical roller bearing (SRB) is one variant witnessing increasing use because it is self-aligning and can support high loads. It is becoming increasingly important to understand how the SRB responds dynamically under a variety of conditions. This study introduces a computationally efficient, three-degree-of-freedom, SRB model that was developed to predict the transient dynamic behaviors of a rotor-SRB system. In the model, bearing forces and deflections were calculated as a function of contact deformation and bearin

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Qiao, Guan, Geng Liu, Shangjun Ma, Zhenghong Shi, Yawen Wang, and Teik C. Lim. "An improved thermal estimation model of the inverted planetary roller screw mechanism." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 23 (2018): 4430–46. http://dx.doi.org/10.1177/0954406218762961.

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The inverted planetary roller screw mechanism has recently become competitive in the electro-mechanical actuation system due to its high load-carrying capacity and small assembly size. However, a significant amount of heat at the frictional contact interfaces and power loss inside the electrical machine can be naturally generated in a compact and high-load inverted planetary roller screw mechanism system. The conductive heat leads to the temperature rise of inverted planetary roller screw mechanism components that subsequently results in thermal drift and error as well as the actuation accurac

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Pan, Rui, Tao Xu, and Yong Liu. "The Fault Diagnosis Method for Roller Bearing with Harmonic Wavelet Packet and DT-SVM." Applied Mechanics and Materials 724 (January 2015): 238–41. http://dx.doi.org/10.4028/www.scientific.net/amm.724.238.

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This paper studies the roller bearing fault diagnosis method with harmonic wavelet packet and Decision Tree-Support Vector Machine (DT-SVM). The harmonic wavelet packet possesses better performances for its box-shaped spectrum and unlimited subdivision compared with the conventional time-frequency feature exaction method. Firstly, the proposed method decomposes the roller bearing vibration signal with harmonic wavelet packet and extracts the feature energy with coefficients of each spectrum. After the feature energy is normalized, feature vector are available. Based on multi-level binary tree,

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Vedishchev, Sergey, A. Brusenkov, N. Milyukov, M. Garina, and V. Sorokin. "Designing of the device with a roller support for grinding root crops." Актуальные направления научных исследований XXI века: теория и практика 3, no. 1 (2015): 125–29. http://dx.doi.org/10.12737/10611.

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Nezic, A., Aleksandar Knezevic, Milan Cirkovic, Predrag Milojevic, Miroslav Jakovljevic, and S. Jagodic. "Postcardiotomy assisted circulation with roller pump-early and late results." Acta chirurgica Iugoslavica 50, no. 4 (2003): 69–71. http://dx.doi.org/10.2298/aci0304069n.

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The incidence of postcardiotomy myocardial failure (PMF) requiring mechanical circulatory support beyond IABP is reported to be 0.2% to 1.2%. From Dec. 1989 through Dec. 1995, 18 patients (0.3% of the total pump cases) were supported with roller pump type of LVAD. Assisted flow ranged from 3.5 up to 5 L/min with average support time of 35.5 hours. Six (33.3%) patients (pts) died while on LVAD. The causes of additional seven deaths (pts weaned of LVAD) were: myocardial failure (4), stroke (2) and intractable bleeding during removal of the LVAD (1). Overall, five patients (27.8 %) were successfu

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Soejima, Mitsuhiro, Yuki Matsushita, and Shingo Sakaguchi. "2309 Study on Friction Loss in Valve Train with Cam and Roller Follower : Influences of Roller Support Bearing and Engine Oil." Proceedings of the JSME annual meeting 2008.3 (2008): 67–68. http://dx.doi.org/10.1299/jsmemecjo.2008.3.0_67.

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Simonis, Andreas, and Christian Schindler. "Measuring the wheel-rail forces of a roller coaster." Journal of Sensors and Sensor Systems 7, no. 2 (2018): 469–79. http://dx.doi.org/10.5194/jsss-7-469-2018.

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Abstract. During a roller coaster ride, the vehicles and their passengers are exposed to multiple times the acceleration of earth's gravity. The corresponding forces must be transmitted by the wheels to the track and the support structure. To validate the load assumptions of static and fatigue analysis, it is necessary to measure these forces. Currently, it is deemed sufficient to measure only the accelerations, providing a limited view of the whole. This article presents a method to measure the actual forces and moments that act on a wheel. Since the diameters of roller coaster wheels are com

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Li, Xin rong, LiuBo Wu, Zhaoning Bu, and Lidong Liu. "Predicting the number of fiber roots in lola drafting based on multi-field coupling." Textile Research Journal 90, no. 23-24 (2020): 2769–81. http://dx.doi.org/10.1177/0040517520930192.

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Pullout theory is very important in improving efficiency, quality, and production costs. Because production efficiency is too low for mechanical drafting equipment, a simple multi-field coupling model of fiber mechanics based on conserving momentum is proposed that considers the distribution of the fiber speed point, slip rate, and friction mechanics. When the roller draft multiple is increased, the position near the rear roller clamp mouth in the draft area will show a sharp decrease of fiber, which is caused by the rapid movement of the front fiber to drive the floating fiber movement, and i

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