| Citation: | HU Xueman, HOU Liang, BU Xiangjian, et al. Vibration and noise analysis of fuel pump regulator under combined load[J]. Journal of Aerospace Power, 2024, 39（10）：20220849 doi: 10.13224/j.cnki.jasp.20220849
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To investigate the dynamics of a highly integrated fuel pump regulator under combined structural and fluid loads, and compare the difference in responses between its working and non-working states, a hydraulic model was established to obtain the pressure of main action area under extreme conditions according to the principle of the hydraulic system. The structural damping was identified by the Ploymax method. The excitation load was reconstructed by the response control principle and system characteristics, and the load form was transformed by the large mass method (LMM). The acoustic-structure interaction method was used to solve the modal and vibration responses under the combined boundary, and the indirect boundary element method (IBEM) was used to calculate the acoustic response. The results indicated that the change of free mode without fuel prestress was little, and the peak response of vibration and noise considering casing vibration and fuel prestress was significantly reduced at low frequency, the first order frequency was reduced by 17.3%, and the maximum noise value at this frequency was reduced by about 14.3 dB, and the response had a tendency of increase beyond 600 Hz, compared with results of non-fluid-structure interaction.
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