Comparison of Two Algorithms for Predicting the Rotor and Flexible Casing Contact Behavior

以兩種方式預測轉子與撓性外殼接觸行為的比較

陳幼良

《中華民國振動與噪音工程學會論文集》 1998 (1998/05) Pp. 341-345

https://doi.org/10.30028/CSSVANNUAL.199805.0341

摘要

撓性外殼對轉子／外殼系統的衝擊動態行為影響在本文中被提出。轉子模型包含了一個位於均質軸自由端的剛性圓盤，而其另一端爲簡支端。外殼被模擬爲一的薄的圓環。外殼和轉子模型均可處理任意有限數量的廣義座標。在接觸期間，一線性彈簧被用來模擬接觸行為。本論文推導兩種方式預測接觸位置。其一適合用於當圓環彈性變形相對小於轉子和外殼的起始間隙時，另一法用於當圓環彈性變形相對大於轉子和外殼的起始間隙時可得較精確的結果。

並列摘要

The effects of casing flexibility on the impact dynamics of a rotor/casing system are studied. The rotor model consists of a rigid disc mounted at the free cod of a uniform shaft, which is simply supported at the other end. The casing is modeled by a thin ring. During contact, a linear spring is used to model the contact behavior. Two algorithms for predicting the contact position have been derived. One is suitable for the case where the elastic deformation of the ring is small compared to the initial clearance. The other is more accurate for the case where the elastic deformation of the ring is relatively large compared to the initial clearance.