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標題: 無介面層之螺栓接合界面模擬之方法
No Gap Element Modeling of Bolted Joints Interface
作者: 沈保衡
Sen, Pao-Heng
關鍵字: 螺栓接合;介面模擬
出版社: 機械工程學系

The correct modeling of interfaces affects the results of finite element analysis. The stiffness of interface was usually modeled by spring elements. Although this approach achieves the purpose of modeling interfaces, the time spent on creating the finite elements model is significant.
The purpose of this thesis is to simplify the interface modeling of bolted joints and to reduce the modeling time. Two different models are created in this thesis. One has interface elements and the other one has no interface element. The differences of analyses by these two models are compared. The model without interface elements uses Young's moduli and the moduli and structural damping coefficients of elements neighboring the interface as design variables. The correlation of the finite element model and modal test data are accomplished through optimization procedure. The objective is to minimize the differences of analytical and measured natural frequencies. The MACs are used as constraints. After finishing the identification of stiffness, the optimization procedure is used again to minimize the differences of analytical and measured modal damping ratios. Three different types of bolted joints and three different tightening torques are used to test the proposed method of this thesis.
Appears in Collections:機械工程學系所

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