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題 名 | Parametric Effects of Plates with CLD Treatment on Vibration Suppression=拘束阻尼層板參數對振動效應之分析 |
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作 者 | 陳億成; 黃世欽; | 書刊名 | 中國機械工程學刊 |
卷 期 | 20:2 1999.04[民88.04] |
頁 次 | 頁159-167 |
分類號 | 446.12 |
關鍵詞 | 黏彈材料; 減振; 拘束層; 三層板; CLD; Vibration suppression; Viscoelastic material; |
語 文 | 英文(English) |
中文摘要 | 本文探討一具黏彈材料為核心的三板結構之參數變化對減振效應之影響。首先經 由能量準則推導出運動方程式,並利用假設模態法離散該運動方程式後,得到可覆蓋極薄的 拘束層(CL)及黏彈層(VEM)之離散方程式。文中接著分析不同的參數變化組合如黏彈層的厚 度、拘束層的厚度、拘束層的剛性及覆蓋面積等,以得不同的頻率響應及阻尼比。此外,本 文從能量吸收觀點定義一指標P*,作為量取更正確的阻尼量。由數值結果顯示,每一參數 都具有單向的影響程度,此不同於殼結構體,但隨著各參數之增加,其增加的減振量亦隨之 遞減,本文之成果可提供減振設計者一有效且方便的減振評估。 |
英文摘要 | A study of parametric effects on vibration suppression of three-layer plates with viscoelastic core is presented. This study uses a mathematical model that allows the thickness of the constrained layer (CL) and the viscoelastic material (VEM) layer to approach very thin. That model was derived by an energy approach in conjunction with the assumed-modes method. The frequency responses arid the resulting damping effects under various compositions of VEM thickness, CL thickness, CL stiffness, and coverage size are discussed. In addition, the case of thickness constrained treatment was also investigated. The results showed that the best selection for the cases investigated is the CL thickness being twice the VEM thickness. In this paper, an index P* for damping measurement is defined. Numerical results also show individual effects of each parameter and provide useful information for designers. According to these parametric effects, readers should get a physical sense of how to select the CLD treatment for best vibration suppression. |
本系統中英文摘要資訊取自各篇刊載內容。