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سفتی متقابل
The roughened stator helps reduce leakage, and also offers the benefit of reducing the average circumferential velocity within the seal and the destabilizing cross-coupled stiffness coefficient.
cross-coupled stiffness k.
where Ms is the mass of stator housing, fsx and fsy are measured forces on the housing, K and k are the direct and cross-coupled stiffness, and C and c are the direct and cross-coupled damping.
The parameter is useful in comparing annular seals since it com- bines the effects of direct damping and cross-coupled stiffness, both of which are associated
TABLE 10.3 Cross-Couple Stiffness and Direct Damping Values
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