Analyses and Applications of Nonlinear Liquid Systems on Vibration Isolation

非線性流體系統於隔振之分析與應用

Wenlung Li ； YuYen Wei

《中華民國振動與噪音工程學會論文集》 2010 (2010/06) Pp. 293-300

https://doi.org/10.30028/CSSVANNUAL.201006.0293

摘要

使用一些非線性軟性元件對於振動抑制是有效的。然而，大多數的應力應變經驗公式並不精確且有著材料以及尺寸上的侷限。因此值得發展他種的非線性隔振器來改善。吾人希望該系統效應類似於使用一軟彈簧之系統，而進一步在一定程度上可自由地設計各式各樣的軟彈簧項次。特別地是，流體將用於構成此隔振系統。在本報告中介紹了三種型態的非線性流體系統(NLS)，分別是交換型、浮力型以及承載型，他們可能為變動質量系統。本研究也推導了這些系統運動方程式於。在特定造型下，分析結果顯示其具有軟效應。本文展示了一種承載型的實驗架構以供未來驗證其軟效應。總而言之，本文對使用非線性流體系統作為隔振器提出一些指引與建議。

關鍵字

流體 ； 非線性 ； 軟彈簧 ； 變動質量 ； 隔振器

並列摘要

Nonlinear soft elements are usually effective forvibration reduction. However, most stress-train relationsare not exact and have limitation of materials and scale.It’s desirable to develop other kinds of nonlinear isolatorsto improve it. Anticipating the effect of such a system issimilar to a soft spring system, one can have a certainextend to design diverse kinds of soft spring terms.Especially, liquid is used to build the isolation systems.In this paper, three types of nonlinear liquid systems(NLS) are introduced, which are the exchange, buoyanceand loading types. They are variable mass systems. Theequations of motion of these systems are also derived toverify their nonlinearities. Numerical simulations arefollowed for several example shapes. The analysis resultsshow soft spring effects. An experimental model isdisplayed to verify its soft spring effect in the next steps.This paper gives guidelines and suggestions for usingNLS as vibration isolators.

並列關鍵字

Liquid system ； Nonlinear system ； Soft Spring ； Variable Mass ； Vibration Isolator