理论计算发现粘弹体的粘滞项对频散低阶模式影响不大，但随着粘滞的增大对高阶模式可产生影响。

It shows that the viscosity offers only little effect on lower mode of dispersion curve, and it effects on higher mode of dispersion curve with the increasing of damping.

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研究了密封抗压强度与粘弹体中的磁粉含量、所加磁场强度、磁场分布形式之间的关系，得出了磁粉最佳比例。

The relations were studied among seal and compressive strength, magnetic powder content, strength and distribution form of magnetic field. A new formula was presented to be used for magnetic sealing.

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