Temat: Dynamic model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dynamic analysis of a mechatronic drive system with an induction motor
Autorzy:: Cao, Yongdi
Liu, Xiaohong
Powiązania:: https://bibliotekanauki.pl/articles/2200885.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: dynamic model
electromechanical system
vector control
optimization
rotor
Opis:: The paper presents research findings in the modelling and optimization of dynamic parameters of mechatronic systems with an induction motor. A mathematical model was developed to analyze currents in dynamic states of squirrel-cage rotors in the case of a line-to-line fault. The findings were verified experimentally using calculations for a 1.5 kW three-phase induction motor. The equations for a stationary 0x, 0y coordinate system relating to the stator were derived. The set of design variables selected in the optimization process contained parameters describing design features of the gear shafts and control units settings.
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 245--258
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A model for the dynamic analysis of a belt transmission using the Dahl friction model
Autorzy:: Kubas, K.
Powiązania:: https://bibliotekanauki.pl/articles/279796.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: belt transmission
dynamic analysis
Dahl friction model
Opis:: The paper presents a two-dimensional model of a belt transmission for dynamic analysis. It is assumed that the belt is modelled by links joined by spring-damping elements with its rotational and translational stiffness. Normal forces in the contact between the belt and the pulleys are implemented by assuming its stiffness and damping, whereas friction is modelled by the Dahl friction model. The calculation results are also presented in two specific cases of load of the belt transmission.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1423-1435
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Model considering residual stiffness and stiffness discontinuity of bolted joints
Autorzy:: Wang, Sheng-Ao
Zhu, Min
Xu, Zi-Jian
Guo, Ming
Li, Biao
Wu, Fei
Powiązania:: https://bibliotekanauki.pl/articles/2087050.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: nonlinear dynamic behaviour
Iwan model
energy dissipation
Opis:: The nonlinear dynamic behavior has an important impact on energy dissipation and vibra- tion damping characteristics of bolted joints. Firstly, the development of tangential dynamic models is summarized and analyzed. Secondly, a five-parameter Iwan model based on a trun- cated power-law distribution is proposed. The backbone and hysteresis curves are obtained. Thirdly, normalized and dimensionless analysis is performed. On the basis of the above, a more concise four-parameter Iwan model with stiffness continuity is proposed. Finally, the validity of the model is verified by comparing the energy dissipation vs excitation force amplitude curve with the experimental data.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 1; 63--75
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Relation between strain hardening of steel and critical impact velocity in tension
Zależność między umocnieniem odkształceniowym stali a krytyczną prędkością uderzenia przy rozciąganiu
Autorzy:: Rodriguez-Martinez, J. A.
Rusinek, A.
Arias, A.
Powiązania:: https://bibliotekanauki.pl/articles/279460.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: critical impact velocity
RK model
dynamic tension
Opis:: In the present paper, a numerical study on the influence of strain hardening on the Critical Impact Velocity (CIV) in tension is conducted. Finite element code ABAQUS/Explicit is used to carry out numerical simulations of dynamic tension tests in a wide range of impact velocities up to that corresponding to the CIV. The constitutive relation due to Rusinek and Klepaczko (2001) has been used to define the material behaviour. Strain hardening parameters of the RK model were varied during the simulations. Numerical results are compared with those obtained from the analytical description of CIV proposed by Klepaczko (2005). Satisfactory agreement is found between numerical and analytical approaches. The analysis allows for a better understanding of the causes responsible of the CIV appearance.
Praca przedstawia numeryczną analizę wpływu umocnienia odkształceniowego na krytyczną prędkość uderzenia (CIV) przy rozciąganiu. W symulacjach zastosowano oprogramowanie ABAQUS/Explicit oparte na metodzie elementów skończonych. Obliczeń dokonano dla dynamicznych obciążeń rozciągających w szerokim zakresie prędkości uderzenia aż do osiągnięcia wartości krytycznej (CIV). Do opisu materiału próbki użyto równań konstytutywnych modeli Rusinka-Klepaczki. Podczas analizy zmieniano parametry umocnienia odkształceniowego opisanego tym modelem. Wyniki symulacji numerycznych porównano z analitycznym opisem CIV zaproponowanym przez Klepaczkę (2005). Uzyskano zadawalającą zgodność pomiędzy symulacją a teorią. Przedstawiona analiza przyczynia się do lepszego zrozumienia zjawisk odpowiedzialnych za powstawanie krytycznej prędkości uderzenia (CIV).
Źródło:: Journal of Theoretical and Applied Mechanics; 2009, 47, 3; 645-665
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A new nondeterministic method for optimal selection of master degrees of freedom for dynamic condensation based on evolutionary optimization
Autorzy:: Mucha, Waldemar
Powiązania:: https://bibliotekanauki.pl/articles/1839637.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: dynamic condensation
optimization
evolutionary algorithm
model order reduction
Opis:: The following paper presents a new method for choosing a set of master degrees of freedom for the process of dynamic condensation in order to reduce a finite element model. The general rule is that the more degrees of freedom are eliminated, the more accurate the reduced model is. However, eliminating different subsets (of equal sizes) of degrees of freedom may influence the accuracy differently. Therefore, choosing an optimal subset is crucial. The presented method is based on multicriterial evolutionary optimization which makes it the first nondeterministic approach based on computational optimization technique for this application.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 445-458
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: On the optimum absorber parameters: revising the classical results
Autorzy:: Puzyrov, V.
Awrejcewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/281548.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: dynamic vibration absorber
Den Hartog’s model
frequency-amplitude curve
optimization
Opis:: The dynamic vibration absorber is a kind of mechanical device with inertia, stiffness, and damping. Once connected to a given structure or machine, it is capable of absorbing vibratory energy. As a result, the primary system can be protected from excessively high vibration levels. In this paper, we deal with classical Den Hartog’s model to clarify the known results and improve the mathematical component of this approach. We suggest the optimal choice of absorber parameters, which is slightly different and more general analytical approach. The comparison of two methods of optimization is carried out, and the corresponding error of calculus is estimated.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 3; 1081-1089
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Numerical and experimental investigation on nonlinear dynamic characteristics of planetary gear train
Autorzy:: Zhang, Jianwu
Guo, Han
Yu, Haisheng
Zhang, Tong
Powiązania:: https://bibliotekanauki.pl/articles/1839620.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: deep hybrid transmission
power split devices
lumped parameter model
dynamic instability
Opis:: A deep hybrid electric vehicle (DHEV) equipped with a Ravigneaux compound planetary gear train (PGT) encounters severe gear whine noises during acceleration in the EV drive mode. For the analysis of vibro-acoustic sources, a 5DOF lumped-parameter vibration model for the PGT dynamic system is established as well as sound pressures radiated from the transmission on a test bench are measured for data processing and recognition. By comparison between numerical and experimental analyses, natural vibration modes of the PGT are examined and high frequency modal resonances in association with the planetary gears are observed only to cause narrow band whine noises. Furthermore, a 2DOF reduced dynamic model for the planetary gears with consideration of nonlinearities such as time-varying mesh stiffness and backlash is proposed, and numerical solutions to bifurcations and dynamic instabilities of the two sets of planetary gears are obtained. It is found that nonlinear vibration behaviour of the long and short planets are major causes of shock and vibration of the hybrid transmission. Severe vibro-acoustic noises excited dominantly by the planetary gears are alleviated after implementing micro-geometry modifications to the PGT.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 1009-1022
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Impact of material nonlinearity of dam-foundation rock system on seismic performance of concrete gravity dams
Autorzy:: Ouzandja, Djamel
Messaad, Mokhtar
Berrabah, Amina Tahar
Belhrizi, Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/2200865.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: concrete gravity dam
dynamic dam-foundation rock interaction
Drucker-Prager model
cracking
nonlinear earthquake analysis
finite element method
Opis:: This paper shows the impact of material nonlinearity of a dam-foundation rock system on seismic performance of Oued Fodda concrete gravity dam, located at northwestern side of Algeria. For the purpose, a three-dimensional dam-foundation rock system finite element model is employed in analyses. The hydrodynamic interaction between reservoir water and dam-foundation system is implicitly taken into consideration by the Westergaard approach using surface finite elements added to dam-fluid and foundation-fluid interfaces. The concrete material model is used to present the cracking of dam concrete under a seismic load the using smeared crack approach based on the Willam and Warnke failure criterion. The materially nonlinear analysis for both dam concrete and foundation rock is performed using Drucker- -Prager model. According to numerical results, tensile stresses and maximum strains reduce significantly in the materially nonlinear model. In addition, the cracking areas in the dam decrease also when material nonlinearity characteristics of the dam-foundation rock system is considered in analyses.
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 49--63
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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