混合矽油對黏滯性液體阻尼器行為影響之初步研究

工程師對於在結構中裝設黏滯性液體阻尼器以消能減振之目的，偏好使用速度項指數n值較小的液流阻尼器，其原因在其於小地震時便能產出輸出足夠的力量控制結構振動，但大地震時卻不致因輸出力量過大反使結構受損。對環型間隙阻尼器的n值降低有以下三種方法：高速、小間隙、稠矽油，但採用這些方法亦會產生其他不良副作用。本研究排除以上三種方法，但由矽油著手。經由文獻得知混合矽油可使矽油較易稀化，此特性或降低阻尼器n值，因此以混合矽油填充於阻尼器內進行試驗。利用五種純矽油混合成二元與多元混合矽油，使其黏度成為1000 cps，將阻尼器測試數據進行回歸分析比較，結果顯示混合矽油確能使阻尼器n值降低，且其值可較純矽油阻尼器降低約0.1。

關鍵字

結構控制；黏滯性液體阻尼器；矽油；黏滯係數；非牛頓流體

並列摘要

The engineer’s purpose of installed the liquid viscosity dampers in the structures is energy dissipation, they prefer to use the liquid resistor which has smaller speed-index n, the reason is that when small earthquakes comes, it can produce output power to control structural’s vibration, but when the bigger earthquake comes, output power will not be too large to destroy structural. There are three methods to reduce n value of gap damper: high-speed, small gap and thick silicone oil, but using these methods will also have other adverse side effects. In this study, we excluded these three methods, but we started from the silicone oil. Through literature we can know that mixed silicone oil is more easily to become thinning, therefore, we use mixed silicone oil to experiments. Each groups are mixed by five kind of pure silicone oil, and each group’s viscosity is 1000 cps, finally, we analysis and comparison the test data of the damper. The result is that mixed silicone oil can reduce n value and about 0.1 lower than the pure Silicone oil of the damper.