Fluid-structure interaction characteristics of tension membrane structures under free-vibration and forced-vibration based on numerical simulation

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-08 DOI:10.1016/j.tws.2025.113290

Feixin Chen , Tian Li , Qingshan Yang

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引用次数: 0

Abstract

Tension membrane structures are apt to experience severe vibration under wind action, and may undergo substantial fluid-structure interactions (FSI). Accurate consideration of the FSI effects in the wind-induced response of such structures is critical for their response estimation. Motion-induced aerodynamic force model established by forced-vibration testing is widely used to estimate the wind-induced response considering FSI effects of flexible structures, and is regarded as an efficient substitute for the technically demanding and costly free-vibration test. Nevertheless, the accuracy and applicability of the motion-induced force model on the response estimation of tension membrane structures under wind remain uncertain, due to the strong nonlinearity in wind-induced response of such structures. In this research, a systematic comparison of wind-induced response obtained by free-vibration test and estimated by the motion-induced aerodynamic model established by forced-vibration test is performed for tension membrane structure based on numerical simulations. A closed-type, one-way tensioned flat membrane structure is determined to be the object due to its relatively idealized geometric configuration. Fully-coupled simulations are utilized for the free-vibration model and validated against the reference aeroelastic experimental results, and complementary forced-vibration simulations are performed to establish the motion-induced aerodynamic force model. It is found that the displacement responses of tension membrane structure estimated by motion-induced aerodynamic force model agrees well with those obtained from free-vibration test, while discrepancies exist between forced-vibration model and free-vibration model in the distribution of fluctuating pressures above the membrane. Energy transfer analysis and proper orthogonal decomposition (POD) analysis on the FSI system show that the discrepancies mainly arise from the disturbance and weakening of the coupling between the vortex convection and structural motion of the forced vibrating model, resulting from the influence of low-order body-induced vortex shedding components.

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基于数值模拟的自由振动和强制振动下张力膜结构流固耦合特性

张力膜结构在风的作用下容易产生剧烈的振动，并可能发生大量的流固耦合（FSI）。准确考虑此类结构的风致响应中的FSI效应对其响应估计至关重要。通过强迫振动试验建立的运动诱导气动力模型被广泛用于估计考虑FSI效应的柔性结构的风致响应，被认为是技术要求高、成本高的自由振动试验的有效替代方法。然而，由于张力膜结构的风致响应具有较强的非线性，运动诱导力模型在风作用下对张力膜结构响应估计的准确性和适用性仍然不确定。本研究在数值模拟的基础上，对张力膜结构进行了自由振动试验得到的风致响应与强迫振动试验建立的运动诱导气动模型估算的风致响应进行了系统比较。由于其相对理想的几何形态，确定了一种封闭型、单向张拉平面膜结构作为对象。对自由振动模型进行了全耦合仿真，并与参考气动弹性实验结果进行了验证，对运动诱导气动力模型进行了补充强迫振动仿真。结果表明，运动诱导气动力模型计算的张力膜结构位移响应与自由振动试验结果吻合较好，而强迫振动模型与自由振动模型在膜上脉动压力分布上存在差异。FSI系统的能量传递分析和适当正交分解（POD）分析表明，这种差异主要是由于低阶体致涡脱落分量的影响对强迫振动模型的涡对流与结构运动之间的耦合造成干扰和减弱。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.