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標題: 以螺栓接合界面剛性與阻尼之驗証
Identification of Stiffness and Damping of Bolted Joints
作者: 胡興億
hu, Hsing-yi
關鍵字: bolted joints;螺栓接合;stiffness;damping;勁度;阻尼;界面
出版社: 機械工程學系

The correct modeling of the stiffness and the damping of bolted joints affects the accuracy of finite element analysis. As a result, a lot of researches have been done. Traditionally spring elements and dampers are inserted into the interface of the bolted surfaces to respresent the stiffness and the damping of the joint. The correct values of the stiffness and the damping are obtained by tuning the values to match experimental result.
This paper tried to use interface element to replace the spring elements to model the stiffness of the joint. The young's moduli of the interface elements are adjusted to correlate the analysis and expenimental results. The optimization theory is used to minimize the differences of experimental and analytical frequencies. The constraints are imposed to maintain the orthogonality condition of mode shapes. Anisotropic material is assumed for the interface elements. The tightening torque of the joint is varied to observe the effects on stiffness and damping of the joint.
Appears in Collections:機械工程學系所

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