Vibration and damping analysis of aerospace pipeline conveying fluid with constrained layer damping treatment

Abstract

The constrained layer damping materials are thoroughly used to control the vibration duo to their high capacity to dissipate vibration energy. Researchers have handled the vibration and damping behavior of the constrained layer damping structures accurately. However, for the constrained layer damping pipeline conveying fluid, there are few works on the investigation of the vibration characteristics. This paper is aimed to investigate the vibration and damping characteristics of the constrained layer damping pipeline conveying fluid under elastic boundary supports. Considering the fluid–structure interaction, the developed finite element method is employed to establish the motion equations of the constrained layer damping pipeline. The influence of the support stiffness, the fluid velocity and pressure, the thickness and the elasticity modulus of viscoelastic, and constraining layer parameters are all considered. The results indicate that an appropriate selection of the boundary support stiffness, the viscoelastic, and constraining layer parameters can obtain desirable modal properties, which can provide an efficient tool in the design and maintenance of aerospace pipeline for passive vibration control.

Uncertain Frequency Responses of Clamp-Pipeline Systems Using an Interval-Based Method

“…Euler-Bernoulli beam [6], [7], [26] or Timoshenko beam [8], [9] model is frequently used to calculate the pipeline system whose inner diameter is much smaller than the pipe length. When the ratio between the length and the diameter of the pipeline is greater than 5 times, Euler-Bernoulli beam can be adopted for dynamic modeling [49].…”

“…Besides, the pipe [10] and the shell element [11], [12] were also used in the literatures to develop the corresponding finite-element model. For instance, Gao et al established the reduced hydraulic pipeline model using the Euler-Bernoulli beam [6], [7] and Timoshenko beam [8], in which the clamp was simplified as springs. Based on incompressible potential flow, Firouz [12] established a fluidstructure interaction model for stability analysis using the shell model.…”

Vibration and Damping Analysis of Pipeline System Based on Partially Piezoelectric Active Constrained Layer Damping Treatment

“…Passive constrained layer damping includes a viscoelastic material (VEM) layer and a constrained layer, and the damping capacity is controlled by changing the shear strain of viscoelastic materials [ 3 ]. Gao et al [ 4 ] established a finite element model of a passive constrained layer damping pipeline under elastic boundary support, and studied the influence of key parameters such as support stiffness, fluid velocity and pressure, the thickness and the elastic modulus of VEM on pipeline vibration. The characteristics of PCLD include the structure being simple and without external energy input.…”

Optimization of Hoop Layouts for Reducing Vibration Amplitude of Pipeline System Using the Semi-Analytical Model and Genetic Algorithm

“…Sadeghi and Karimidona [6] used an FEM-state space approach to study the dynamic behavior of the pipeline conveying fluid. Gao et al [7][8][9] used spring element to simulate the boundary supports and developed the pipeline system conveying fluid by finite element method. Chai et al [10] developed a dynamic modeling approach of the curved pipeline system with clamps and investigated the nonlinear vibration.…”