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題 名 | 應用壓電驅動器於懸臂樑之實驗模態分析=Applications of Piezoceramic Actuators to the Experimental Model Testing of Cantilever Beams |
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作 者 | 王柏村; 王重杰; | 書刊名 | 技術學刊 |
卷 期 | 12:3 1997.09[民86.09] |
頁 次 | 頁419-425 |
分類號 | 448.94 |
關鍵詞 | 壓電驅動器; 實驗模態分析; 樑; Peizoceramic actuator; Experimental modal testing; Beam; |
語 文 | 中文(Chinese) |
中文摘要 | 本論文旨在以壓電驅動器取代傳統使用之衝擊鎚或激振器,配合加速度計作感 應器,對懸臂樑作實驗模態分析。文中首先推導加速度計與壓電驅動器間之頻率響應轉換 函數,並得知加速度振型為位移振型,而壓電驅動器振型為其兩端斜率差振型,在懸臂樑 之應用,二者恰為鏡像映射關係,實驗證明可成功地得到前四個模態之自然頻率與阻尼比 ,除了低頻的第一個振型差異較大外,其餘振型皆與理論振型相當吻合。此測試方式將可 應用到結構系統偵測,甚至遙控檢測。 |
英文摘要 | This paper presents the use of piezoceramic (PZT) actuators in the replacement of conventional actuators, such as hammers or shakers, in conjunction with the use of accelerometers as sensors for the experimental modal testing of cantilever beams. The frequency response functions (FRFS) between accelerometers and PZT actuators are first derived. The accelerometer mode shapes and PZT actuator mode shapes are obtained and shown to possess the relationship of mirror image in particular for the cantilever beam. Experiments show that the use of accelerometers and PZT actuators for modal testing can successfully determine the natural frequencies and damping ratios of the first four modes of the cantilever beam. The mode shapes extracted from the experimental FRFs match very well with those from theoretical analysis except for the first mode shape due to its low frequency. The modal testing technique can be applied to structural health monitoring as well as to remote structural testing. |
本系統中英文摘要資訊取自各篇刊載內容。