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題名 | 滑動結構動態分析模式=Modeling of Sliding Structure Subjected to Base Excitation |
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作者 | 王文清; 許桂銘; Wang, Wen-ching; Hsu, Kuei-ming; |
期刊 | 高苑學報 |
出版日期 | 19980200 |
卷期 | 7:1 1998.02[民87.02] |
頁次 | 頁283-291 |
分類號 | 441.2 |
語文 | chi |
關鍵詞 | 摩擦隔震結構; 庫倫摩擦; 振動臺試驗; Sliding structure; Coulomb friction; Shaking table test; |
中文摘要 | 本文針對滑動結構受力特性,考慮底層滑動之邊界條件,提出滑動結構之改進模 式,並以震動臺試驗,驗證理論之可靠性。滑動結構模式之特點在於將滑動基座視為 一增加之自由度。如此不但可以將滑動邊界受力平衡單獨列舉方程式,更可以將上部 結構受振反應之回饋力量列入滑動邊界平衡式中予以考量。對於滑動摩擦之模擬,除 了接受傳統Coulomb摩擦模式外,對於摩擦係數隨著速度改變部份,採用黏滯阻尼 加以考量。本文模式分析結果與振動臺試驗結果比較相當符合。尤其是結果顯示,滑 動結構之自然振動頻率並不會因滑動底座存在而改變,這點經振動臺試驗得到明確驗 證。 |
英文摘要 | This paper presents an improved model for analyzing the dynamic response of structure with a sliding base. Validity of the presented model is examined using data obtained by shake table tests. This model considers the sliding base as an additional degree of freedom in the modeling. An additional equilibrium is therefore added into the global simultaneous equilibrium equations, and the responses of superstructure can be introduced into the force equilibrium of the sliding base. The friction resistance at the sliding interface governed by Coulomb's criterion together with viscous damping which is proportional to the sliding velocity. Analytical results of using the presented model have very good agreement with experimental data obtained by the shake table tests. It is worth to noted that the natural frequency of structure remain unchanged if a sliding base is equipped, and this fact has been proved by the presented shaking table tests. |
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