Academic literature on the topic 'Speed Fastening'

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Journal articles on the topic "Speed Fastening"

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Wang, Wei Ping, Dun Jin Cai, Xu Feng Ma, and Ping Wang. "Description of Subway DT Series Fastening." Applied Mechanics and Materials 644-650 (September 2014): 535–38. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.535.

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In recent decades, with the acceleration of population flowing in China, large and medium-sized cities to speed up the construction of urban rail. Relatively high speed railway, the requirement of the urban rail is relatively low, so it can be designed on the basis of high speed railway track structure for urban rail transport, this gives the designer the design of large space;Each city urban rail structure more or less differences. Especially fastening system is various, even in the same line also exist different fastening systems.Because Chinese fastening system in the subway is various, not a fixed is widely used fastening system;This paper, the DT series fastening in subway system has carried on the simple summary. Make a reference for fastening researchers.
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Sadeghi, Javad, Mohammad Fesharaki, and Amin Khajehdezfuly. "INFLUENCES OF TRAIN SPEED AND AXLE LOADS ON LIFE CYCLE OF RAIL FASTENING CLIPS." Transactions of the Canadian Society for Mechanical Engineering 39, no. 1 (March 2015): 1–11. http://dx.doi.org/10.1139/tcsme-2015-0001.

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Railway fastening clips play an important role in the stability and safety of railway track systems. There are various studies conducted on fastening clip failure mechanism. Although the majority of these studies indicate that fatigue is the main cause of clip failure, little attentions has been paid to parameters influencing clip fatigue characteristics. In response to this need, a new testing machine was developed by which the structural and loading conditions of fastening clips are simulated in a laboratory. Clip permanent deformations were measured for various track operational conditions, and consequently correlations were developed between clip plastic defamations and track axle loads as well as train speeds. The results obtained pave the way of determining the required clip maintenance cycles for various track loading conditions.
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Zhao, Xin, Jizhong Yang, Boyang An, Chao Liu, Yabo Cao, Zefeng Wen, and Xuesong Jin. "Determination of dynamic amplification factors for heavy haul railways." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 232, no. 2 (December 5, 2016): 514–28. http://dx.doi.org/10.1177/0954409716679203.

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A new approach has been developed to determine the dynamic amplification factors of railways. This approach employs a traditional multi-body dynamic model of vehicle–track interaction and a 3D explicit finite element model of wheel–rail rolling contact to treat the low- and high-frequency dynamics, respectively. Excitations are considered by contact surface unevenness and more specifically, by the power spectrum density of track irregularity for the low-frequency analysis and by the critical wheel flat, weld, and rail corrugation for the high frequency. For the 40-tonne axle load heavy haul railway simulated in this work, it has been found that the optimum fastening stiffness should be 150–200 MN/m; the dynamic amplification factors of the wheel–rail contact, fastening, and ballast forces are 1.94, 2.0, and 1.67, respectively, if the fastening stiffness of 200 MN/m is applied. Finally, new dynamic amplification factor formulae that include key parameters such as the fastening stiffness, speed, and axle load are proposed for the heavy haul railway design.
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Zhang, Haibo, Jinfeng Yang, Wei Tao, and Hui Zhao. "Vision method of inspecting missing fastening components in high-speed railway." Applied Optics 50, no. 20 (July 8, 2011): 3658. http://dx.doi.org/10.1364/ao.50.003658.

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Shang, Lei, Wen Bo Wang, Ting Ting Liu, Lei Cai, Hao Wang, and Zhen Dong Dai. "An Equipment Used for Studying the Vestibular Perception of Gekko gecko." Applied Mechanics and Materials 461 (November 2013): 570–76. http://dx.doi.org/10.4028/www.scientific.net/amm.461.570.

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The study of vestibule neurons specific firing mode of Gekko gecko under stimulus of different angles and rotating speeds has an important theoretical significance to reveal the control mechanism of Gekko geckos vestibular position as well as to the development of gecko-robots. A vari-angle rotating equipment was made to give different stimulus in study of Gekko geckos vestibular electrophysiology. The equipment mainly consisted of four parts as follows: fastening panel for stereotaxic instrument, shaft locking device, counterweight, driving system. The shaft locking device and counterweight realized tight fixation and torque equilibrium at different angles respectively. Fastening panel matched the general stereotaxic instrument. A stepper motor driver controlled the velocity and acceleration of rotation. Initial experiment verified that the equipment had superiority of easy operation, reliable positioning and accurate control of angle and speed, which indicated that it could meet the demand of the Gekko geckos vestibule research.
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Gorev, Vycheslav. "Ensuring explosion safety of residential buildings." MATEC Web of Conferences 193 (2018): 03046. http://dx.doi.org/10.1051/matecconf/201819303046.

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Explosions of air - and-gas mixtures in residential buildings – incident dangerous and recently extended. Unlike the production explosive buildings residential buildings are not protected by express requirements. In this work the possibility of protection of these buildings by means of a depressurization through the coming-off apertures is analyzed. These apertures can be closed by windows or express light-weight constructions. In work it is shown that fastenings of these designs in an aperture considerably are reduced by effectiveness of opening of apertures as the incipient state of driving of protective designs does not open space for venting of gases. Explosion pressure at the same time grows as in closed volume and until opening can reach critical value and cause destruction of the protecting and load-bearing frames. By the time of opening of an aperture for venting of gases the Safety design already has sufficient speed, and discovery of the area in that case happens quickly and pressure increases slightly. The main pressure boost happens before destruction of fastening of mild designs and at their driving in an aperture when volume can be considered pressure-tight. Calculations show: that designs with the specific surface density ρp≥30 kg/m2 and depth of seal of ≈0,2 m do not provide protection of residential buildings. The modern windows to double-glazed windows and their fastening are close to these conditions.
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Kruglov, Pavel V., and Irina A. Bolotina. "Technology of Manufacturing of Disk Blanks to High-Speed Elements for Tests on Anti-Meteoroid Protection." ITM Web of Conferences 35 (2020): 04013. http://dx.doi.org/10.1051/itmconf/20203504013.

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In this paper, a variant of the manufacturing technology of the disk blank for the segment liner of the shape charge is proposed. The charges are used to test the anti-meteorite stability of spacecraft. The proposed method makes it possible to form a blank in which, as its thickness decreases from the center to the periphery, a periodic profile variable in thickness is formed simultaneously in the circumferential direction. The disk metal blank is fixed in a three-cam chuck and the end face of the disk is cut with a decrease in thickness along the generatrix from the center to the periphery. Under the action of fastening forces, the disk blank is deformed and after processing the thickness in the cross section has a triangular periodic profile. Experiments on processing of disk preparations at various efforts of machine device are carried out. The dependences of the disc thickness on the fastening force in the device are obtained. After harmonic analysis of the thickness of the cross section, the values of the amplitudes of harmonics of different thickness in the circumferential direction at different distances from the center of the disk blank were determined. An increase in the fastening force leads to an increase in the amplitude of the third harmonic of the part thickness. It is shown that the change in the amplitudes of the first and second harmonics of different thickness is insignificant, and the amplitude of the third harmonic increases from the center to the periphery, which is caused by a decrease in the stiffness of the workpiece in the peripheral region.
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Liu, Yi, Heng Liu, Xin Wang, and Minqing Jing. "Nonlinear dynamic characteristics of a three-dimensional rod-fastening rotor bearing system." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 5 (June 18, 2014): 882–94. http://dx.doi.org/10.1177/0954406214539471.

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The nonlinear dynamic characteristics of three-dimensional rod-fastening rotor bearing system are investigated in this paper. The rod-fastening rotor includes discontinuous shaft, rotating disks, circumferentially distributed rods, and macrointerfaces between disks. The first three parts are discretized by three dimensional elements, and the macrointerfaces are connected by some springs whose stiffness is determined by a proposed linear partition method. For comparison, the three-dimensional dynamic model of a corresponding complete rotor bearing system is also built. After the rod-fastening and complete rotor bearing system are reduced by a component mode synthesis, periodic motions and stability margins are calculated by using the shooting method and path-following technique, and the local stability of system is obtained by using the Floquet theory. Comparative results show the both systems have a resemblance in the bifurcation features when mass eccentricity and rotating speed are changed. The vibration response has the identical frequency components when typical bifurcations occur. The dynamic stress is obtained by regarding the displacements of all nodes as load. Moreover, the unbalanced and insufficient of the pre-tightening forces lead to obvious disadvantageous influence on the stability and vibration of the both systems. Generally, this paper considers the interfacial effect of the rod-fastening rotor bearing system and the relative nonlinear dynamic features are obtained.
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Yi, Qiang, Cai-you Zhao, Ping Wang, Xin Gao, Liu-cong Wang, and Wen-hua Ke. "Estimation of Rail Axial Force in High-Speed Railway Ballastless Track Based on Wave Modes." Mathematical Problems in Engineering 2019 (July 17, 2019): 1–11. http://dx.doi.org/10.1155/2019/4329830.

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To estimate the rail axial force of high-speed railway ballastless track, the reasonable index without complex measuring or error correction process is proposed. Taking the ballastless track structure in high-speed railway as the research object, the wave motion of periodic ballastless track is studied using the wave finite element method. It is found that some standing wave modes are linearly correlated with the rail axial force and thus can be considered as the basic indices for rail axial force estimation. A further in situ experiment according to the modal test method is performed and the feasibility of different wave modes for estimating rail axial force is discussed. Experiment results show that the lateral wave mode coincides well with the theoretical result while there is a large difference for the vertical wave mode. To explicate the difference, the temperature-dependent properties of the fastening are tested additionally. Parametric analysis shows that the frequency shift of vertical wave mode is greatly affected by the fastening temperature-dependent characteristics including the rail pad, elastic pad, and fastener clamping force, while the frequency shift of lateral wave mode is mainly determined by the rail axial force.
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Zhao, J. J., X. B. Zhao, Xian Hui Li, Bin Zhang, Bo Wang, and Wei Zhang. "Fasteners State Detection System Based on Wireless Data Transfer Module." Applied Mechanics and Materials 513-517 (February 2014): 3924–27. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.3924.

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The safety requirements demanded from rail traffic have risen above all in view of the rapid development of modern high-speed trains. Railway fastener is the important part of rail line. The normal state of the fastener is the guarantee of the rail transportation security. The missing or broken fastener may be the tremendous threaten to the security, or even cause the serious traffic accidents. This paper presents a new fully automatic and configurable wireless data transfer system able to detect the absence of the fastening bolts that fix the rails to the sleepers. The systems guarantee a high accurate detection for the missing or broken fastening elements in combination with the strain measurement of the rubber pad under rail.
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Dissertations / Theses on the topic "Speed Fastening"

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Gotlib, Ilia. "An Analysis of High-Speed Impact Nailing for Lightweight Automotive Structures." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408718602.

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Srinivaas, Sujith. "Testing and Analysis of Innovative High-Speed Automotive Fastening System for Multi Materials." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587397193415362.

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Sattler, Andrew M. "An Analysis of Strain and Displacement within Elastically Averaged Electromagnetic Formed Joints." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420650508.

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Carrascal, Vaquero Isidro Alfonso. "Optimización y análisis de comportamiento de sistemas de sujeción para vías de ferrocarril de alta velocidad española." Doctoral thesis, Universidad de Cantabria, 2006. http://hdl.handle.net/10803/10606.

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Los nuevos ferrocarriles de Alta Velocidad Española (AVE) suponen, respecto a su predecesor, la línea Madrid-Sevilla, un incremento en la velocidad máxima, pasando de los 280-300 km/h de la línea original a los 350 km/h que se pretende alcanzar en los nuevos trazados. Este incremento de velocidad origina mayores solicitaciones que afectan a la superestructura de la vía y, por ello, se hace necesario un redimensionado de todos los parámetros de diseño del trazado. Entre los componentes de la superestructura se encuentra el sistema de sujeción. Este sistema está constituido por un conjunto de pequeños elementos de vía que fijan el carril a la traviesa dando continuidad estructural a la vía. El sistema de sujeción cobra mayor importancia debido a este incremento de los esfuerzos originado por el aumento de las velocidades, convirtiéndose en un elemento clave de la superestructura de vía. Esta Tesis, pretende, en primer lugar, encontrar el sistema óptimo de sujeción que se adapte a las exigencias establecidas por la administración en el "Pliego de bases para el suministro de sujeciones" para ferrocarriles de alta velocidad. En segundo lugar, una vez definido el sistema, analizar el comportamiento de la sujeción, tanto desde el punto de vista individual de cada componente, como desde el punto de vista global. Este análisis incluye la totalidad de propiedades importantes del sistema, desde las mecánicas, ya sean estáticas o dinámicas, hasta las eléctricas, pasando, entre otras, por las de durabilidad y deterioro. También, se estudiarán las posibles variaciones sufridas por estas propiedades en función de parámetros externos, como pueden ser los de carácter ambiental, e internos propios del sistema de sujeción.
The new Spanish High Speed Railways (AVE) involve, regarding its predecessor, Madrid-Seville line, an increase in the maximum speed, going from 280-300 km / h of the original line to 350 km / h that expects in the new routes. This speedup produces greater efforts that affect the superstructure of the track and, therefore, resizing of all design parameters of the track is required. The fastening system is among the components of the superstructure. This system is made up of a set of small track pieces that fasten the rail to the sleeper giving structural continuity to the track. The fastening system is becoming more important because of this greater efforts caused by the increased speeds, becoming a key element of the track superstructure. The aim of this thesis is, first, to find the optimum fastening system that well suits the requirements set by the administration in the "Terms for the supply of fasteners" for high speed railways. Secondly, this thesis, once the system has defined; analyzes the behaviour of the fastening, both from the point of view of individual component, and from a global perspective. This analysis includes all the important properties of the system, from the mechanical properties, whether static or dynamic, to the electrical properties, besides the hardness and deterioration. Also, the possible changes undergone for these properties depending of external parameters, such as the environmental measure, and own internal parameters of the fastening system were studied.
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Gooyers, CHAD. "An ergonomic evaluation of Speed Fastening work rates." Thesis, 2009. http://hdl.handle.net/1974/5113.

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Present day manufacturing assembly relies extensively on a variety of fasteners for the assembly of sub-systems, components and trim. Speed Fastening (SF) is one commonly used non-structural assembly fastening method. The primary limitation of SF is the lack of continuously fed rivets. One path to productivity improvement for SF is the development of a continuously feed tool that would eliminate the non-value added time currently scheduled for reloading in the work cycle. In preparation for the design of a new tool, a proactive ergonomic investigation was carried out to examine differences in muscular effort, upper-body posture, as well as subjective ratings of perceived exertion and discomfort across three different work rates for a simulated SF task conducted in a laboratory setting. The purpose of this investigation was to characterize the ergonomic consequences that an increase in work rate would have on SF operators. Twelve healthy female subjects participated in simulated SF work over four test-sessions. The first test session familiarized subjects with the SF tasks as well as the data collection protocol. Subsequent test days, which were scheduled 24 hours apart, were block randomized to one of three work rates (7, 14 and 21 fasteners/min.) with subjects required to complete 120 minutes of a simulated SF task at both waist and shoulder height using a 50% work to rest duty cycle. The results of this study show significant increases in the amount of muscular activity required to complete the simulated SF, particularly for the 21 fasteners per minute work rate, with increases in peak sEMG amplitudes ranging from 3-12% MVIC. Specifically these increases were most marked in the forearm extensor muscles. In addition, significantly deviated postures were found in upper-limb joint ROM data, particularly when SF work was completed at shoulder height. Overall, based on the increased exposure to risk factors known to be precursors for workplace injury (i.e. repetition and awkward posture), it is inferred that an increase in work rate will put SF operators at an elevated risk of musculoskeletal injury. It is expected that this risk would be even more pronounced for work completed at shoulder height.
Thesis (Master, Kinesiology & Health Studies) -- Queen's University, 2009-09-02 00:01:36.701
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Book chapters on the topic "Speed Fastening"

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Watanabe, K., Y. Sato, K. Takahara, and S. Umeda. "15 Features of elastic rail fastening device for high speed railways and improvement of it based on the results of its use." In TRACK TECHNOLOGY, 191–98. Thomas Telford Publishing, 1985. http://dx.doi.org/10.1680/tt.02289.0019.

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Conference papers on the topic "Speed Fastening"

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Truess, Jeff A., Michael D. Assadi, John L. Hartmann, Emma King, and Alan Minshull. "Flexible High Speed Riveting Machine." In Automated Fastening Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-2948.

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Peterson, Donald B. "High Speed Carbide Drilling in Aluminum." In Automated Fastening Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-3020.

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Mayländer, Holger, and Ed Bella. "BRÖTJE-Integrated Panel Assembly Cell (IPAC) for High Speed Riveting Applications in Commercial Airplane Production." In Automated Fastening Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-3425.

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Haldimann, Ryan. "High Speed Fastener Inspection." In SAE 2016 Aerospace Manufacturing and Automated Fastening Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2016. http://dx.doi.org/10.4271/2016-01-2145.

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Schueller, John K., Sharath A. Cugati, Ahmed Yousuf, John C. Ziegert, and Edmund P. Leigh. "High Speed Machining of Helicopter Gearcases." In SAE 2004 Aerospace Manufacturing & Automated Fastening Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-2826.

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Izco, Luis, Javier Isturiz, and Manu Motilva. "High Speed Tow Placement System for Complex Surfaces with Cut / Clamp / & amp; Restart Capabilities at 85 m/min (3350 IPM)." In Aerospace Manufacturing and Automated Fastening Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-3138.

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Khan, Naweed A. "Shock Wave Formation and Aerodynamic Heating in the Presence of a Protrusion on Flat Plate in High Speed Flow." In SAE 2010 Aerospace Manufacturing and Automated Fastening Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1830.

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Gupta, Abhishek, Arun Sahayadhas, and Vivek Gupta. "Proposed Techniques to Design Speed Efficient Data Warehouse Architecture for Fastening Knowledge Discovery Process." In 2020 IEEE Third International Conference on Artificial Intelligence and Knowledge Engineering (AIKE). IEEE, 2020. http://dx.doi.org/10.1109/aike48582.2020.00039.

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Grassé, J., and D. Lange. "Field Testing of Concrete Crossties and Fastening Systems for the Understanding of Mechanistic Behavior." In 2013 Joint Rail Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/jrc2013-2408.

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To adequately satisfy the demands placed on North America’s railway infrastructure through ever increasing freight tonnages and development of its high speed rail program, the design and performance of concrete ties and elastic fastening systems must be improved. As a part of a study funded by the Federal Railroad Administration (FRA) aimed at improving concrete crossties and fastening systems, field experimentation was performed at the Transportation Technology Center (TTC) in Pueblo, CO by researchers from the University of Illinois at Urbana-Champaign (UIUC). This paper details the extensive instrumentation program which includes strain gages and linear potentiometers. Testing was conducted over seven adjacent concrete crossties in tangent and curve track utilizing TTC’s Track Loading Vehicle (TLV) as well as passenger and freight train consists. Measurements taken consisted of the wheel-rail input loads, component stresses (e.g. insulator post compression), concrete tie strains, and displacements of the rail and concrete tie. The data was collected synchronously to provide a means to capture the load path, target areas of uncertainty, and provide comprehensive data for the validation of a multi-tie, 3-D finite element model being developed by UIUC. Varying train speeds, track curvature, and loading types provided a means to assess the loading variability that can be expected within the fastening system and lead to more purposeful and efficient instrumentation strategies. Furthermore, this data can be used to guide future research in further quantifying the field loading demands on system components, ultimately leading to the mechanistic design of the concrete crosstie and fastening system.
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Lu, Mingjian, Haipeng Geng, Guohui Xu, Lie Yu, and Weimin Wang. "Analytical and Experimental Study of Dynamic Characteristics of Rod Fastened Rotor-Bearing System Under Preload Saturation." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95397.

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This paper investigates the dynamic characteristics of a composite rotor fastened by rods. Contact stiffness and equivalent bending stiffness between discs with different rod preloads of the rotor are obtained respectively by using the elastic and elastic-plastic contact theory. The finite element model of rotor-bearing system is built with Timoshenko beam elements. Critical speeds are respectively calculated with and without the consideration of contact effect, including the changing bearing dynamic coefficients. A test rig of rod fastening rotor-bearing system has been constructed to verify the numerical model results. The results show that the critical speed increases with rod preload and it keeps almost constant when the rod preload reaches a certain value, called preload saturation. The experiments demonstrate that the rod fastening rotor under preload saturation has the similar dynamic characteristics as integral rotor, such as the critical speed and backward whirl with asymmetric support stiffnesses. This kind of rotors which are under preload saturation can be analyzed and designed as an integral one without considering the contact effect. The study gives referential recommendations for analysis and design of a class of composite rotors which contain discs and rods.
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