Temat: frequency model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: CFD-predicted rotordynamic characteristics of a high temperature sodium liquid seal
Autorzy:: Wang, Tong
Chen, Pingwei
Ma, Wensheng
Yu, Guangbin
Powiązania:: https://bibliotekanauki.pl/articles/2086978.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: sodium liquid seal
multi-frequency whirling model
rotordynamic characteristics
CFD
Opis:: Rotordynamic characteristics of a high temperature sodium liquid (HTSL) seal were studied in this paper by using CFD software. Compared with the water liquid seal, the HTSL seal has a larger leakage flow rate and a lower drag power loss. The HTSL seal has a larger direct stiffness coefficient and the effective stiffness coefficient Keff is also larger than the water liquid seal, which means the HTSL seal has a better stiffness capacity. The HTSL seal possesses a positive effective damping coefficient Ceff in the whole whirling frequency range, which means better stability for the rotor system especially in high rotor speeds.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 3; 347--360
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

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

Artykuł

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