Modal selection and alignment of a large bundled rocket based on full rocket modal data

HU Mingming,TAN Shujun,ZHOU Ruhao,HE Xiao

Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (20) : 217-222.

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (20) : 217-222.

Modal selection and alignment of a large bundled rocket based on full rocket modal data

  • HU Mingming1, TAN Shujun1,2,ZHOU Ruhao3,HE Xiao1
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Abstract

In this paper, the studies on modal selection and alignment methods for large bundled rockets were carried out.Using the modal data of the whole rocket, the normalization of the modal data was improved firstly, and the formulas for the selection coefficients of bending, torsion, longitudinal and local modals were given respectively.Then, the modal alignment method based on the Modal Assurance Criterion and the modal selection results were presented to make the modal aligning at different seconds.Finally, simulation verifications were performed on the dynamical model of a certain type of bundled rocket.Simulation results show the correctness and effectiveness of the proposed modal selecting and alignment method.

Key words

large bundled rocket / modal data, modal selection / modal alignment

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HU Mingming,TAN Shujun,ZHOU Ruhao,HE Xiao. Modal selection and alignment of a large bundled rocket based on full rocket modal data[J]. Journal of Vibration and Shock, 2021, 40(20): 217-222

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