頁籤選單縮合
題名 | 螺栓鎖固搭接平板之模擬分析與驗證=Simulation and Model Verification of Bolt Jointed Overlap Plates |
---|---|
作者 | 王栢村; 王廷維; | 書刊名 | 應用聲學與振動學刊 |
卷期 | 6:2 2014.12[民103.12] |
頁次 | 頁1-8 |
分類號 | 446.863 |
關鍵詞 | 螺栓鎖固; 搭接平板; 模型驗證; 振動模態; Bolt jointed; Overlap plates; Model verification; Vibration mode; |
語文 | 中文(Chinese) |
中文摘要 | 螺栓接合結構常用於機器組件,而螺栓接合之模擬技術是工程分析重要的議題。本文主要探討螺栓鎖固搭接平板,考慮不同平板長度及不同螺栓扭矩之鎖緊力。螺栓接合結構之有限元素模型,以三維立方體元素建構平板,以接觸元素對模擬螺栓鎖固搭接平板之接觸面,以及以桁架元素模擬螺栓受到扭矩之初始應變效應,並以此有限元素模型進行模態分析,以求得結構的模態參數,包括自然頻率與模態振型,分別對無阻尼與具阻尼效應的結構,進行正交與複數模態分析。結果顯示,理論模態參數與實驗求得的結果相當吻合,螺栓接合結構考慮不同螺栓扭矩之模擬分析獲得成功的驗證,特別可得到不同搭接平板長度及螺栓鎖緊度的接觸元素對之物理參數校正,包括接觸面的剛度係數以及阻尼係數。螺栓接合結構之有限元素模型的阻尼效應模擬,也分別以常數阻尼比以及元素阻尼兩種方式,進行簡諧響應分析之比較探討。本文所發展的螺栓鎖固搭接平板模擬技術,有助於如工具機及螺栓組裝機器等工程結構之模擬分析。 |
英文摘要 | Bolt jointed structures are frequently seen in machineries. A proper simulation technique regarding the bolted joints is desired for engineering analysis. This work aims to study bolt jointed overlap plates with different plate lengths and different tighten forces for applied torques on the bolts. The finite element (FE) model for the bolted structure is constructed by using 3D solid elements for the plates, contact element pairs for the interface effects between plates, and truss elements for the bolt with initial strain effect due to different applied torques on the bolt. Modal analysis can then be performed on the FE model to obtain structural modal parameters, including natural frequencies and mode shapes. Both normal mode and complex mode analyses are considered for undamped and damped structures, respectively. Theoretical modal parameters are compared with those obtained from experiments and shown very good agreement. The simulation techniques for the bolted structures can be well validated for different applied torques on the bolts. In particular, the physical parameters of contact pair elements can be calibrated including contact stiffness as well as interface damping effect for different bolt jointed plate conditions. The implementation of structural damping in FE model is also addressed for both constant damping ratio and element damping methods, respectively. The developed analytical approach in simulating the bolted structures can be useful for engineering structural analysis, such as machine tools and bolted assembly machineries. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。