Vibration analysis of aero parallel-pipeline systems based on a novel reduced order modeling method
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DOI 10.1007/s12206-020-0705-3
Journal of Mechanical Science and Technology 34 (8) 2020 Original Article DOI 10.1007/s12206-020-0705-3 Keywords: · Parallel-pipeline · Reduced order modeling · Fluid-structure · Vibration analysis · Multi-supports
Correspondence to: Peixin Gao [email protected] Tao Yu [email protected]
Citation: Gao, P., Zhang, Y., Liu, X., Yu, T., Wang, J. (2020). Vibration analysis of aero parallel-pipeline systems based on a novel reduced order modeling method. Journal of Mechanical Science and Technology 34 (8) (2020) ?~?. http://doi.org/10.1007/s12206-020-0705-3
Received February 13th, 2020 Revised
May 22nd, 2020
Accepted June 7th, 2020
Vibration analysis of aero parallel-pipeline systems based on a novel reduced order modeling method Peixin Gao, Yuanlin Zhang, Xuefeng Liu, Tao Yu and Jiao Wang School of Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, China
Abstract
The modeling of parallel-pipeline is a difficult work in engineer field duo to long distance complex pipelines. Vibration analysis of pipeline can become prohibitive due to high computational time associated with large number of degrees of freedom. Thus, the efficient model reduction technique to analyze the vibration characteristics of pipeline system is challenging for designers. The objective of this paper is to propose a reduced order modeling method of parallel-pipeline with multi-supports. Considering the constraint interface stiffness at the elastic support and the coupled fluid-structure pipeline system, a novel reduced order model is obtained by assembling the reduced substructure element. Modal analysis is performed for parallel-pipeline system, and the calculation results for reduced order model are compared with the full finite element model. The obtained results indicate that the natural frequencies and mode shapes of the reduced order model are consistent with full finite element model. Moreover, an interesting phenomenon is obtained that the fluid velocity in one of parallel-pipeline can decrease the natural frequencies of another pipeline. The proposed model can obtain sufficient calculation accuracy and higher calculation efficiency, which can provide insight and guidance for engineers in aircraft.
† Recommended by Editor No-cheol Park
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
The pipeline is usually applied in engineering field for the transportation of liquid such as aerospace, shipbuilding and nuclear power plant system, fuel supply lines in automotive, etc. There are a large number of parallel-pipelines in the laying design of aircraft duo to the space constraint, and the gaps between pipelines are generally very small. The clamps are usually used to fix and support various pipelines, and they are commonly simplified as linear springs with an equivalent stiffness value. The parallel-pipeline system can be regarded as a complex and mutually coupled system. The pump fluid fluctuation and bas
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