When the contact models are being built, an effective method is presented to solve the problem of bringing pre-load force.
在建立接触模型时，对预紧力的施加提出了有效可行的处理方法。
Analysis results indicate: shroud tightness is determined by pre-twist Angle of shroud and working load, the centrifugal force plays a main role to the tightness change.
分析结果表明，叶冠的紧度由预扭角和工作载荷决定，离心力对紧度的变化起主要作用。
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