Liguori Aurelio, Armentani Enrico, Bertocco Alcide, Formato Andrea, Pellegrino Arcangelo, Villecco Francesco
Degree Course in Transport, University "G. Fortunato", Viale Raffaele Delcogliano, 12, 82100 Benevento, Italy.
Department of Chemical, Materials and Production Engineering, University of Naples "Federico II", Piazzale V. Tecchio, 80, 80125 Napoli (NA), Italy.
Entropy (Basel). 2020 Nov 16;22(11):1306. doi: 10.3390/e22111306.
This article lists some tips for reducing gear case noise. With this aim, a static analysis was carried out in order to describe how stresses resulting from meshing gears affect the acoustic emissions. Different parameters were taken into account, such as the friction, material, and lubrication, in order to validate ideas from the literature and to make several comparisons. Furthermore, a coupled Eulerian-Lagrangian (CEL) analysis was performed, which was an innovative way of evaluating the sound pressure level of the aforementioned gears. Different parameters were considered again, such as the friction, lubrication, material, and rotational speed, in order to make different research comparisons. The analytical results agreed with those in the literature, both for the static analysis and CEL analysis-for example, it was shown that changing the material from steel to ductile iron improved the gear noise, while increasing the rotational speed or the friction increased the acoustic emissions. Regarding the CEL analysis, air was considered a perfect gas, but its viscosity or another state equation could have also been taken into account. Therefore, the above allowed us to state that research into these scientific fields will bring about reliable results.
本文列出了一些降低齿轮箱噪音的技巧。出于这个目的，进行了静态分析，以描述啮合齿轮产生的应力如何影响声发射。考虑了不同的参数，如摩擦、材料和润滑，以验证文献中的观点并进行一些比较。此外，还进行了耦合欧拉-拉格朗日（CEL）分析，这是一种评估上述齿轮声压级的创新方法。再次考虑了不同的参数，如摩擦、润滑、材料和转速，以便进行不同的研究比较。静态分析和CEL分析的结果都与文献中的结果一致——例如，结果表明，将材料从钢改为球墨铸铁可改善齿轮噪音，而提高转速或增加摩擦会增加声发射。关于CEL分析，空气被视为理想气体，但也可以考虑其粘度或其他状态方程。因此，上述内容使我们能够指出，对这些科学领域的研究将带来可靠的结果。
