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Abstract: Finger seal (FS) system, which is composed of many components, is used for gas-path sealing and shaft sealing in aero-engine. Because of its complex structure and operation conditions, the previous research on hysteresis
characteristic of FS did not consider the dynamical behavior when
the rotor ran at high speed. In order to solve this problem, the
relations between the dynamical parameters and structure parameters as well as operation parameters in the system are gained through simulation experiment in finite element method. Furthermore, a mass-spring stiffness-damp dynamical model of the FS system is proposed. Thus the dynamical hysteresis characteristic of FS system can be analyzed by the model. The present work shows that radial move and hysteresis characteristic of FS in dynamical
condition are larger than those in static condition. Mean-while, it
also indicates that the dynamical characteristic analysis of the FS
is necessary. Moreover, the idea of transforming engineering
practical system to controllable mathematic system presented in
current work provides a valuable thinking for related research works
of similar complex system, such as multiple objective optimum researches.
Key words: Finger seal Dynamics
Hysteresis characteristic
Finite element method
CLC No: TB122
国家自然科学基金(50575182)、航空科学基金(05C53056)和航空支撑科技基金(04B53004)资助项目. Received 20060706, received in revised form 20061128
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