Vibration of a thin panel exposed to ramp-induced shock-boundary layer interaction at Mach 2

Eitner, Marc A.; Ahn, Yoo-Jin; Musta, Mustafa N.; Clemens, Noel T.; Sirohi, Jayant

doi:10.1016/j.jfluidstructs.2023.103894

Cited by 9 publications

(1 citation statement)

References 16 publications

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“…Eitner et al investigated the interaction between a flexible plate under compressive oblique impulse excitation and boundary layer interaction (SBLI) in Mach flow. Zheng et al solved the transverse displacement function and the vibration response matrix of a rectangular thin plate on a Winkler foundation by selecting the modified Fourier series and Rayleigh-Ritz method [27]. Ahmad et al investigated the free and forced vibration response of laminated composite plates.…”

Section: Introductionmentioning

confidence: 99%

Vibration Response of Metal Plate and Shell Structure under Multi-Source Excitation with Welding and Bolt Connection

Ding,

Tang,

Zhang

et al. 2024

Agriculture

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There are many excitation sources and complex vibration environments in combine harvesters. The coupling and superposition of different vibration signals on the plate and shell seriously affect the working parts of the body. This also reduces the reliability of the whole machine. At present, domestic and foreign research on existing harvesters mainly focuses on harvesting performance, with less research on vibration characteristics. Therefore, in this paper, the vibration response of the metal plate–shell under the two connection modes of bolt connection and welding is studied, in order to optimize the design and structure of the plate–shell structure of the combine harvester and improve the overall performance. First, the welded and bolted plates are numerically modeled using Hypermesh pre-processing functions. Then, the boundary conditions are simulated by continuous variable stiffness elastic constraint experiments. Finally, the intrinsic vibration dynamic model of the four-sided simply supported plate and four-sided solidly supported plate is established using the modal superposition method. By analyzing the modal frequencies and vibration patterns, the following results are obtained. The connection method between the plate and the frame has a significant impact on the inherent vibration characteristics of the plate. The bolt connection will make the plate’s intrinsic vibration frequency higher than that of the welding method, but the effect on the plate’s intrinsic vibration pattern is more minor. At the same time, in order to verify the accuracy of the model, the actual modal vibration patterns and frequencies of the same proportion of plates in the modal test are compared with the results of modal vibration patterns and frequencies obtained by Ansys. The errors of the two dynamic model analytical methods are within 1% and 3%, respectively. This result verifies the accuracy of the dynamic model of the metal plate and shell structure under different connection methods.

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Section: Introductionmentioning

confidence: 99%