裝置多孔材質之諧調液體阻尼器物理特性研究

Study on physical characteristics of tuned liquid dampers with porous media

李昌育(Chang-Yu Li)

指導教授 ： 黃維信

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2021年)

https://doi.org/10.6342/NTU202102083

摘要

本文研究裝置不銹鋼網組合之諧調液體阻尼器物理特性。理論方面，應用多孔材質理論，假設流場為無旋流且不可壓縮，使流場的速度勢滿足拉普拉斯方程式(Laplace equation)，並且假設流場滿足達西定律。邊界條件為壁面的不可穿透性、自由液面的運動邊界條件與動力邊界條件。利用上述條件求解穩態與暫態的速度勢，並建立阻尼器的等效機械模型。實驗方面，分別利用衝擊實驗與簡諧實驗測量裝置不銹鋼網組合之諧調液體阻尼器在暫態過程與穩態過程的的物理特性(壁面波高與壁面衝擊力)。比較諧調液體阻尼器在裝置不同線距或線徑的不銹鋼網組合條件下，物理特性上的差異，最後與理論進行驗證。

關鍵字

諧調液體阻尼器 ； 多孔材質 ； 沖激行為 ； 壁面波高 ； 壁面衝擊力

並列摘要

The purpose of this study is to investigate the physical characteristics of tuned liquid dampers with porous media (PMTLD) comprising stainless wires. Assume that the flow field is irrotational and incompressible. The velocity potential satisfies Laplace equation. Assume that the flow field satisfies Darcy’s law. The flow field satisfies impenetrability, kinematic boundary condition and dynamic boundary condition. The equivalent mechanical system of sloshing fluid is established. The experimental studies involve impulse and simple harmonic vibrations. The wave elevation, the sloshing forces of transient and steady states are measured. Different wire structures are used in the experiments to simulate the porous media. Finally, the experimental data are verified by the equivalent mechanical system.

並列關鍵字

Tuned liquid dampers ； Porous media ； Sloshing behavior ； Wave elevation ； Sloshing force

參考文獻

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