Temat: dynamika strukturalna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Identification of building damage using ARMAX model: a parametric study
Autorzy:: Saaed, T. E.
Nikolakopoulos, G.
Powiązania:: https://bibliotekanauki.pl/articles/327280.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: structural identification
damage detection
non-destructive evaluation
ARMAX model
structural dynamic
identyfikacja strukturalna
detekcja uszkodzeń
badania nieniszczące
dynamika strukturalna
model ARMAX
Opis:: The Structural Identification approach is used to identify and localize the existence of damage for a steel frame. The black box linear parametric model called Auto-Regressive Moving Average with eXternal input (ARMAX) was utilized for the construction of the Frequency Response Functions, based on simulation results. The Singular Value Decomposition method was adopted to identify how many significant eigenvalues exist and plot the Complex Mode Indicator Function for the complete frame. Three damage indices were adopted to evaluate the state of damage in the frame. The results indicated that the ARMAX is a robust scheme for structural damage detection.
Źródło:: Diagnostyka; 2016, 17, 3; 3-14
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optimization of gear teeth in the wind turbine drive train with gear contact’s uncertainty using the reliability-based design optimization
Autorzy:: Lee, Changwoo
Park, Yonghui
Powiązania:: https://bibliotekanauki.pl/articles/27309867.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: wind turbine
drive train
gear
structural analysis
dynamics
Fourier transform
reliability based design optimization
turbina wiatrowa
układ napędowy
bieg
analiza strukturalna
dynamika
optymalizacja projektu oparta na niezawodności
Opis:: Although gear teeth give lots of advantages, there is a high possibility of failure in gear teeth in each gear stage in the drive train system. In this research, the authors developed proper gear teeth using the basic theorem of gear failure and reliability-based design optimization. A design variable characterized by a probability distribution was applied to the static stress analysis model and the dynamics analysis model to determine an objective function and constraint equations and to solve the reliability-based design optimization. For the optimization, the authors simulated the torsional drive train system which includes rotational coordinates. First, the authors established a static stress analysis model which gives information about endurance limit and bending strength. By expressing gear mesh stiffness in terms of the Fourier series, the equations of motion including the gear mesh models and kinematical relations in the drive train system were acquired in the form of the Lagrange equations and constraint equations. For the numerical analysis, the Newmark Beta method was used to get dynamic responses including gear mesh contact forces. From the results such as the gear mesh contact force, the authors calculated the probability of failure, arranged each probability and gear teeth, and proposed a reasonable and economic design of gear teeth.
Źródło:: Archive of Mechanical Engineering; 2022, LXIX, 4; 713--728
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

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