Temat: smoothness - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental study of the nonlinear dynamics of a smooth and discontinuous oscillator with different smoothness parameters and initial values
Autorzy:: Chang, Yujian
Chen, Enli
Feng, Ming
Powiązania:: https://bibliotekanauki.pl/articles/281961.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: SD oscillator
experimental system
nonlinear dynamic characteristic
initial value sensitivity
smoothness parameters
Opis:: The dynamic response of a nonlinear system is very sensitive to initial conditions. Both the irrational nonlinearity and the large displacement of a smooth and discontinuous (SD) oscillator have been studied in this paper. An experimental study has been conducted on a model of the SD oscillator with different initial conditions and smoothness parameters. Experimental results indicate that tiny variation in the initial displacement will lead to different kinds of vibrations, and the system exhibits a wide range of nonlinear dynamical phenomena with the change of smoothness parameters. All experimental results are in good conformity with numerical simulation results.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 935-946
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: A tool orientation smoothing method for five-axis machining to avoid singularity problems
Autorzy:: Cui, Chuanhui
Zhu, Zhengqing
Chen, Shuai
Zheng, Qiang
Chai, Jinfeng
Li, Xiancai
Powiązania:: https://bibliotekanauki.pl/articles/2200873.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: aeroengine blade
smoothness of tool orientation
five-axis machine tool
singular area
Opis:: In numerically controlled grinding of aeroengine blades, a sharp change in a rotating shaft caused by a singular zone greatly reduces grinding precision and quality. This paper proposes an algorithm to optimize the tool-path that combines optimization of the C-axis rotation angle, a modification to the tool orientation and adjustments to the tool position by taking a four-array machine tool with two rotational axes (B-axis and C-axis) as an example. The algorithm was verified using VERICUT software, furthermore, in machining experiments, the rotation amplitudes of the rotary axis in singular areas was effectively reduced, which ensured grinding quality of blades.
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 89--102
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

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