Dynamics of rotationally periodic structures

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August undefined, 2024

WebApr 1, 2009 · Thomas DL (1979) Dynamics of rotationally periodic structures. Int J Numer Methods Eng 14:81–102. Article MATH Google Scholar Tiersten HF (1994) Equation for the control of the flexural vibrations of composite plates by partially electroded piezoelectric actuators. In: Smart structures and materials, smart structures and … Webadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Dynamical analysis of multi-stage cyclic structures

WebMay 1, 2011 · The model was extended to investigate the collective dynamics of periodic nonlinear two-dimensional arrays, and two applications have been considered: (i) a 2D array of coupled pendulums under ... WebJun 1, 1986 · Dynamics of rotationally periodic structures. Internat. J. Numer. Meths. Engrg. (1979) D.J. Mead Wave propagation and natural modes in periodic systems. J. Sound Vibration (1975) View more references. Cited by (71) Anisotropic yield models for lattice unit cell structures exploiting orthotropic symmetry. circle of security cooper hoffman and powell

Optimization of a passive vibration control scheme acting on a …

WebFeb 8, 1980 · For a 100 m parabolic dish structure with 3642 structural members contained in 44 units, the periodic analysis involves less than 5% of the variables of a finite element analysis. The frequency response functions obtained are used to compare added coatings, gyroscopic, and tuned damping devices for reducing the responses of large … WebAug 7, 2024 · In a previous study, we proposed a method for the damping of rotationally periodic structures, when a specific mode with n nodal diameters is targeted. The proposed method considers 4n lead zirconate titanate patches (or a multiple of) which can be, either, shunted independently on 4n identical resistor–inductor circuits, or mounted in … WebThe proposed method of analysis is based on the general theory of spatially periodic structures. The main feature of this theory is the possibility to apply Discrete Fourier Transform (DFT) ... Thomas D. L. Dynamics of rotationally periodic structures. Int. J. Numer. Methods Eng., 1979, 14, 81–102. Crossref. ISI. diamondback home schedule

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WebThe method has been implemented in a computer program and is illustrated by analyses of an alternator end winding, a cooling tower with legs, and a wheel of turbine blades. For forced vibration, it is shown that any arbitrary oscillatory force can be decomposed into … WebMay 1, 2002 · Dynamic analysis of a composite rotor. Sahli Souhila, B. Ahmed, Benadda Mohamed. Engineering. 2024. Rotor dynamic is a branch of applied mechanics that … diamondback home game scheduleWebJan 1, 1987 · To obtain the natural frequencies of rotationally periodic structures, a simple block solver is developed. Complex arithmetic is used to reduce the analysis region to a repeating substructure; characteristic matrices are considered to be cyclic in nature (S. Michimura et al., Bull. Jap. Soc. Mech. Engrs24,1968–1993, 1981).Most of the … diamondback hopper

"WebSep 16, 2015 · Ring periodic structures are widely spread in engineering applications, where natural frequencies can split due to the deviation from axisymmetry. ... 2 Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, Tianjin, P. R. China. ... Spatial modulation of repeated vibration modes in rotationally periodic structures. " - Dynamics of rotationally periodic structures

Dynamics of rotationally periodic structures

Analysis of the railway track as a spatially periodic structure

WebOct 1, 2007 · D. L. Thomas, “Dynamics of Rotationally Periodic Structures”, International Journal for Nu- merical Methods in Engineering 14 , 81 (1979). J. Wildheim, “Excitation of Rotationally ... WebMay 1, 2011 · The model was extended to investigate the collective dynamics of periodic nonlinear two-dimensional arrays, and two applications have been considered: (i) a 2D …

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WebDec 1, 2002 · On the other hand, the wheel is a typical rotating structure and usually designed into structure consisting of rotationally repetitive modules [11]. Moses et al. [12] studied the topological ... WebMar 16, 2009 · Tang, J. and Wang, K.W. 1999a ``Vibration Control of Rotationally Periodic Structures using Passive Piezoelectric Shunt Networks and Active Compensation, '' Journal of Vibration and Acoustics, Transactions of the ASME, 121(3) ... Dynamics of periodic spring-mass chain coupled with an electric transm... Go to citation Crossref Google Scholar.

WebDYNAMICS OF ROTATIONALLY PER1OL)IC STRUCTURES 83 analysis of the structure, provided it is linearly elastic. Furthermore it is not confined to vibration, but can be used … WebJul 1, 1999 · This paper proposes a multi-mode vibration suppression scheme for rotationally periodic structures. Identical active-passive hybrid piezoelectric networks …

WebJan 1, 2011 · Dynamics of rotationally periodic structures. Article. Jan 1979; INT J NUMER METH ENG; D. L. Thomas; The paper considers the finite element analysis of … WebRotationally periodic structures are used in many engineering applications such as turbine bladed disks or gear wheels. It is well known that the dynamics of such structures can be studied using the cyclic symmetry reduction. This method makes it possible to analyse the complete cyclic structure by considering a single elementary sector.

WebJun 2, 2014 · The in-plane wave motion is analytically examined to address the stationary deflection, natural frequency splitting, and mode contamination of the rotationally ring-shaped periodic structures (RRPS). The governing equation is developed by the Hamilton's principle where the structure is modeled as a thin ring with equally-spaced …

WebJun 1, 2007 · Rotationally periodic structures are used in many engineering applications such as turbine bladed disks or gear wheels. It is well known that the dynamics of such … circle of security gympieWebThis research will focus on nonlinear vibrations and wave propagation to enable the development of new multi-functional metamaterial devices. The novel self-adaptive metamaterials use a sliding mass mechanism to tune the bandgap to different frequency ranges. This self-adaptive mechanism will be integrated in periodic and quasiperiodic ... diamondback home games 2021WebJan 1, 1979 · Dynamics of rotationally periodic structures Thomas, D. L. 1979-01-01 00:00:00 Central Electricity Research Laboratories, Leatherhead, Surrey, England … diamondback home theaterWebThe free and forced motions of a nonlinear periodic structure with cyclic symmetry are studied. The structure consists of a number of identical linear flexural members coupled … circle of security for dadsWeb2. Rotationally Periodic Structures. A bladed disk or drum equipped with blades is said to have cyclic symmetry, with an interblade phase angle of .It is possible to analyze the complete structure by considering only one substructure [13, 14].Considering two points at the same relative position in two adjacent sectors, the free vibration modes of cyclic … diamondback hook 2022WebApr 19, 2001 · The forced vibration of a rotationally periodic structure when subjected to travelling wave excitation is discussed, with emphasis placed on the steady-state response of doublet modes having either repeated or split frequencies. Such vibration modes have spatially modulated shapes defined by (1) the number of nodal diameters … circle of security eylfWebJun 1, 2007 · Rotationally periodic structures are used in many engineering applications such as turbine bladed disks or gear wheels. It is well known that the dynamics of such structures can be studied using the cyclic symmetry reduction. This method makes it possible to analyse the complete cyclic structure by considering a single elementary … circle of security for teenagers