The Calculation Method and Application of Fluid-Solid Coupling Vibration Responses of Straight Infusion Pipeline

TIAN Rui; CHANG Liang; HAN Tao; NIE Xiaohua

doi:10.21656/1000-0887.440291

Volume 45 Issue 12

Dec. 2024

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Article Navigation > Applied Mathematics and Mechanics > 2024 > 45(12): 1494-1505

TIAN Rui, CHANG Liang, HAN Tao, NIE Xiaohua. The Calculation Method and Application of Fluid-Solid Coupling Vibration Responses of Straight Infusion Pipeline[J]. Applied Mathematics and Mechanics, 2024, 45(12): 1494-1505. doi: 10.21656/1000-0887.440291

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The Calculation Method and Application of Fluid-Solid Coupling Vibration Responses of Straight Infusion Pipeline

doi: 10.21656/1000-0887.440291

TIAN Rui^{1, 2
,},
CHANG Liang^{1, 2},
HAN Tao^{1, 2},
NIE Xiaohua^{1, 2}

1.
Aircraft Strength Research Institute of China, Xi'an 710065, P.R.China
2.
National Key Laboratory of Strength and Structural Integrity, Xi'an 710065, P.R.China

Received Date: 2023-09-26
Rev Recd Date: 2024-02-22
Publish Date: 2024-12-01

Abstract

Abstract

There is a highly nonlinear coupling effect between liquid pressure pulsation and pipeline structure in the infusion pipeline system. Severe coupling vibration will occur under external excitation, which will lead to the failure of the infusion pipeline and connection structure. In view of the lack of analytical methods for the fluid-solid coupling vibration responses of the infusion pipeline, the dynamic characteristics and vibration response theory for the infusion pipeline system with complex supports were given based on the differential transformation method (DTM), and the fluid-solid coupling vibration differential equation for the straight infusion pipeline with complex elastic supports within the span was established based on the Bernoulli-Euler beam theory. The expressions based on the DTM for calculating natural frequencies, displacement responses and support constraint reactions of the pipeline system with the simple support and additional elastic supports were derived in detail. The influences of the internal pressure, the flow rate, the additional support stiffness and the support position on natural frequencies and support constraint reactions of the pipeline system were studied, and the calculation accuracy of the DTM was verified with the structural finite element analysis method. The research shows that, the application of the DTM in the calculation of fluid-solid coupling vibration characteristics and responses of the infusion pipeline system with complex supports has high accuracy and good applicability, especially in the calculation of vibration responses of the pipeline system with complex boundaries and additional supports within the span. Based on the DTM, the mechanical responses of the fluid-solid coupling pipeline system can be conveniently calculated under forced vibration. It provides a theoretical basis for the design of pipelines and connected structures.
- straight infusion pipeline,
- differential transformation method,
- fluid-solid coupling,
- elastic support,
- vibration response

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References(21)

References

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