Dynamic characteristics analysis of complex aircraft pipeline system using MDSMA algorithm
Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105
Article publication date: 17 June 2022
Issue publication date: 24 August 2022
Abstract
Purpose
The dynamic characteristics prediction and frequency-modulation of pipeline was an important work for the design of aircraft hydraulic structure.
Design/methodology/approach
A complex pipeline was deemed as a combination of several segments of straight-pipe-element (SPE). The 3D vibration equations of each SPE were established in their local coordinate system based on Timoshenko-beam model and Euler-beam model, respectively. The dynamic-stiffness-matrixes were deduced from the dispersion relation of these equations. According to the complex pipeline layout in the global coordinate system, a multi dynamic stiffness matrixes assembling (MDSMA) algorithm was carried out to establish the characteristic equations of the whole complex pipeline. The MDSMA solutions were verified to be consistent with experimental results.
Findings
The MDSMA method based on Timoshenko-Beam model was more suitable for the short span aviation pipeline and the vibration at high frequency stage (>350 Hz). The layout affected the pipeline's in-plane stiffness and out-plane stiffness, for the Z-shaped pipe, each order natural mode took place on the ZP and NP alternately. Reasonable designs of bending position and bending radius were effective means for complex pipeline frequency-modulation.
Originality/value
A new dynamic modeling method of aircraft complex pipeline was proposed to obtain the influence of pipeline layout parameters on dynamic characteristics.
Keywords
Acknowledgements
This project is supported by National Natural Science Foundation of China (Grant No. 51875460) and the Aviation Foundation of China (Grant No. 2018ZB53016).
Citation
Liu, W., Zhu, H. and Li, W. (2022), "Dynamic characteristics analysis of complex aircraft pipeline system using MDSMA algorithm", Multidiscipline Modeling in Materials and Structures, Vol. 18 No. 4, pp. 537-561. https://doi.org/10.1108/MMMS-03-2022-0043
Publisher
:Emerald Publishing Limited
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