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Wyszukujesz frazę "dynamic coupling" wg kryterium: Temat


Tytuł:
Numerical modelling of structures with uncertainties
Autorzy:
Kahsin, M.
Tematy:
wind turbine
offshore
FEA
modal analysis
dynamic coupling
sensitivity analysis
design of experiment
response surface method
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Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/260542.pdf  Link otwiera się w nowym oknie
Opis:
The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling of the offshore wind turbine supporting structure. Then problem is studied using the modal analysis, sensitivity analysis, as well as the design of experiment (DOE) and response surface model (RSM) methods. The results of modal analysis based simulations were used for assessing the quality of the FEM model against the data measured during the experimental modal analysis of the scaled laboratory model for different support conditions. The sensitivity analysis, in turn, has provided opportunities for assessing the effect of individual FEM model parameters on the dynamic response of the examined supporting structure. The DOE and RSM methods allowed to determine the effect of model parameter changes on the supporting structure response.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear Interaction of Modes in a Planar Flow of a Gas with Viscous and Thermal Attenuation
Autorzy:
Perelomova, Anna
Tematy:
nonlinear wave theory
nonlinear acoustics
coupling dynamic equations
Burgers equation
diffusion equation
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Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/177137.pdf  Link otwiera się w nowym oknie
Opis:
The nonlinear interaction of wave and non-wave modes in a gas planar flow are considered. Attention is mainly paid to the case when one sound mode is dominant and excites the counter-propagating sound mode and the entropy mode. The modes are determined by links between perturbations of pressure, density, and fluid velocity. This definition follows from the linear conservation equations in the differentia form and thermodynamic equations of state. The leading order system of coupling equations for interacting modes is derived. It consists of diffusion inhomogeneous equations. The main aim of this study is to identify the principle features of the interaction and to establish individual contributions of attenuation (mechanical and thermal attenuation) in the solution to the system.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of a cracked tooth on the dynamic response of a simple gearbox with a flexible coupling under acyclism operation
Autorzy:
Hammami, Ahmed
Hmida, Atef
Chaari, Fakher
Khabou, Mohamed Taoufik
Haddar, Mohamed
Tematy:
acyclism
cracked spur gearbox
dynamic behaviour
elastic coupling
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Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:
https://bibliotekanauki.pl/articles/280247.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, the effect of a cracked tooth on the dynamic response of a simple gearbox with a flexible coupling is studied. The gearbox is driven by a combustion engine through a flexible coupling for which Nelson and Crandall’s model is used. The acyclism regime is generated by diesel engine inducing fluctuations of speed, torque and meshing stiffness. In addition, the cracked tooth of the wheel gear is modelled by lowering the meshing stiffness. After solving the equations of motion by using the Newmark method, the time response, spectrum, joint time-frequency analysis and envelope spectrum are used to characterize the dynamic response of the defected gearbox where the cracked tooth frequency is irregular and independent of the acyclism frequency.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of changes in the working temperature of flexible couplings on their stiffness characteristics
Autorzy:
Opasiak, Tadeusz
Margielewicz, Jerzy
Gąska, Damian
Haniszewski, Tomasz
Tematy:
flexible coupling
dynamic characteristic
sprzęgło elastyczne
charakterystyka dynamiczna
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Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:
https://bibliotekanauki.pl/articles/2203862.pdf  Link otwiera się w nowym oknie
Opis:
This article compares flexible couplings of the spider-type insert, and the tiretype insert. The influences of the volume and hardness of the elastomeric connector on the characteristics of this type of coupling, as well as the course of the change of the stiffness coefficient as a result of changes in the operating temperature, are presented. In drive systems, flexible couplings undergo very frequent changes within a wide range of operating temperatures, which causes a change in the dynamic parameters of the flexible couplings during operation.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remarks on the gluing algorithm for multibody systems co-simulation
Autorzy:
Tomulik, P.
Frączek, J.
Tematy:
simulator coupling
co-simulation
waveform relaxation
dynamic iteration
multibody system dynamics
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Wydawca:
Fundacja na Rzecz Młodych Naukowców
Powiązania:
https://bibliotekanauki.pl/articles/115845.pdf  Link otwiera się w nowym oknie
Opis:
This paper briefs a part of authors’ study on co-simulation techniques and their application to multibody system dynamics. The main concern of the study is on construction and properties of algorithms that are suitable for such purpose. One of the proposed methods from literature is so-called “gluing-algorithm” by Wang et al. These authors proposed Newton iteration to couple several simulators of mechanical subsystems through constraints/reactions, and provided numerical examples to suggest efficiency of the method. Here we re-investigate the method in order to underline some problems that one might meet when using the “gluingalgorithm”.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigative stands to marking of characterizations of the metal-susceptible clutch
Stanowisko laboratoryjne do wyznaczania charakterystyk metalowego sprzęgła podatnego skrętnie
Autorzy:
Kowal, A.
Filipowicz, K.
Tematy:
sprzęgło metalowe
sprzęgło podatne skrętnie
charakterystyka quasi-dynamiczna
charakterystyka statyczna
metal coupling
flexible torsional coupling
quasi-dynamic characteristic
static characteristic
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Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:
https://bibliotekanauki.pl/articles/374493.pdf  Link otwiera się w nowym oknie
Opis:
On the job one introduced the description of investigative stands and the methodics of marking of static characterizations, quasi-dynamic and dynamic. One introduced the course of the torque at the start of the metal-clutch about the large torsional susceptibility and the reaction of the clutch on the extortion with the impulse-turning moment.
Artykuł przedstawia opis stanowisk laboratoryjnego i metalowego do wyznaczania charakterystyk statycznych, quasi-dynamicznych i dynamicznych. Charakterystyki te przedstawiają zachowanie się tego sprzęgła w określonych warunkach pracy, w układzie napędowym.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic characteristics of magnetic coupling in horizontal axis wave energy device
Autorzy:
Zhang, J.
Liu, Y.
Liu, J.
He, T.
Xie, Y.
Tematy:
wave energy
magnetic coupling
dynamic characteristics
transfer function
step response
steady state error
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Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/258488.pdf  Link otwiera się w nowym oknie
Opis:
To solve the dynamic response problems of magnetic coupling in the horizontal axis wave energy device, this has researched the dynamic characteristicsof magnetic coupling. The fitting formula about torque and angle of the magnetic coupling is obtained through experiments. The mathematical models of the magnetic coupling torque transmission are established. The steady state error of the magnetic coupling and the transfer function of the output angle are obtained. The analytical solution of the step response of the output angle in time domain is derived. The influence of the torsional rigidity, the damping coefficient and the driven rotor’s rotational inertia on dynamic characteristics of the magnetic coupling isanalyzed. According to the analysis results, the design rules of magnetic coupling are proposed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The static characteristics of a torsionally flexible metal coupling
Charakterystyki statyczne metalowego sprzęgła podatnego skrętnie
Autorzy:
Filipowicz, K.
Tematy:
sprzęgło metalowe
sprzęgło podatne skrętnie
charakterystyka quasi-dynamiczna
charakterystyka statyczna
metal coupling
flexible torsional coupling
quasi-dynamic characteristic
static characteristic
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Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:
https://bibliotekanauki.pl/articles/374553.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents a description of test stands and the methodology of determining the static characteristics of a metal coupling of high torsional flexibility. In addition, the paper presents preliminary tests results which enable to determine the above characteristics.
W pracy przedstawiono budowę nowego rozwiązania konstrukcyjnego metalowego sprzęgła o dużej podatności skrętnej i opis stanowisk badawczych oraz metodykę wyznaczania jego charakterystyk statycznych. Zaprezentowano także uzyskane wstępne wyniki badań, pozwalające na wyznaczenie wymienionych charakterystyk.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unified model of disturbances acting upon gimbal seeker in anti-tank guided missile
Autorzy:
Nawrocki, Radosław
Tematy:
anti-tank guided missile
gimbal seeker
disturbances
dynamic LuGre friction
imbalance
cross coupling
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Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/2141856.pdf  Link otwiera się w nowym oknie
Opis:
Optimisation of the dynamic response of gimbal seeker plays key role from the point of view of development of anti-tank guided missile’s systems. In this study the set of the most important internal disturbances were integrated in generalized model of two axis gimbal seeker implemented in MathWorks’ Simulink environment. Compared to previous works on the subject, it was enhanced by replacing simple friction model with dynamic LuGre friction. Furthermore, its Coulomb component was linked to the normal force induced by missile’s lateral acceleration. Control system of gimbal seeker proposed in paper was tuned with modelled disturbances turned off and then examined with them being turned one by one. System’s responses were assessed to be significantly deteriorated, proving need of disturbance modelling and its use in control systems’ design.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear dynamic model of a turbine blade considering vibration and crack coupling
Autorzy:
Wang, Yujiang
Luo, Deyi
Huang, Yuanxing
Peng, Yue
Wang, Xudong
Yan, Xingwang
Xiao, Hongming
Huang, Zhongling
Tematy:
runner blade
vibration and crack coupling effect
dynamic model
nonlinear
vibration fatigue
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Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:
https://bibliotekanauki.pl/articles/63161974.pdf  Link otwiera się w nowym oknie
Opis:
In order to further investigate dynamic characteristics of turbine runner blades under the coupling effect of vibration and crack, in this article, a runner blade with a crack was taken as the research object. The coupling effect of vibration and crack was analyzed, a nonlinear dynamic model considering the coupling of the runner blade was developed, and the vibration and fatigue characteristics were investigated. First, based on the contact characteristics of the breathing crack surfaces in the runner blade under hydraulic excitation, a breathing crack surface contact model was established. Subsequently, a nonlinear dynamic model considering the coupling effect of vibration and crack was obtained. The crack surface contact force and crack stiffness matrix were established and the vibration and fatigue characteristics were analyzed. Finally, the feasibility of the dynamic model was verified by a case study, and the dynamic and vibration fatigue characteristics under the coupling effect of vibration and crack were revealed. The research results show that with propagation of the crack, the crack surface contact force increases and the dynamic stress amplitude at the crack tip increases as well. When the sum of the frequency of the hydraulic excitation and the crack surface contact force acting on the runner blade is close to the natural frequency of the runner blade, a combined resonance will occur. When the coupling effect of vibration and crack is taken into consideration, the vibration fatigue crack propagation model is more accurate and can provide a basis for fatigue strength and life prediction of runner blades.
Dostawca treści:
Biblioteka Nauki
Artykuł

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