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ANALYSIS OF COUPLING INFLUENCES OF LABYRINTH SEAL PARAMETERS ON CROSS COUPLED STIFFNESS AND DIRECT DAMPING COEFFICIENT 被引量:3
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作者 Zhou Shouqin, Xie Youbai (Theory of Lubrication and Bearing Institute, Xi’ an Jiaotiong University) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第3期190-196,共7页
Labyrinth seal can cause steam-exciting, the structural and operating parameters of labyrinth seal have effect on stability of rotor-system. For investigating the coupling influences of the structure and operating par... Labyrinth seal can cause steam-exciting, the structural and operating parameters of labyrinth seal have effect on stability of rotor-system. For investigating the coupling influences of the structure and operating parameters of labyrinth seals on dynamic coefficients, a model of calculating dynamic coefficients of labyrinth seals is presented using a two control volume model. The coupling influences of parameters on cross-coupled stiffness and direct damping of labyrinth seal are discussed. In the conclusion, a reference of preventing steam-exciting vibration and optimum determination of design parameters of labyrinth seals are provided. 展开更多
关键词 Labyrinth seal Cross coupled stiffness Direct damping Steam exciting vibratio
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Dynamic Buckling of Laminated Composite Bars Subjected to Axial Impact 被引量:3
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作者 Wang, DY Chen, TY Xin, GN 《China Ocean Engineering》 SCIE EI 1998年第2期127-134,共8页
The impact buckling of a laminated composite bar is investigated in case of one of its ends moving due to axial impact compression. The governing equations considering the first- order shear deformation effect are der... The impact buckling of a laminated composite bar is investigated in case of one of its ends moving due to axial impact compression. The governing equations considering the first- order shear deformation effect are derived by the Hamilton principle and solved by the finite difference method. The critical axial shortness is determined by the B - R cirterion. The given example is used to highlight the influences of initial imperfection, impact velocity, stress wave and coupled stiffness. It is found that the unsymmetrically laminated bar has a quite different dynamic buckling behaviour from that of the symmetrically laminated bar. 展开更多
关键词 impact buckling laminated bar stress wave coupled stiffness axial impact
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