| Popis: |
We present here, in the framework of resonnant behaviours, an eigenfrequency invariance properties for loaded flexural and torsional deformable bodies. We found that under a preload condition each eigenfrequency is invariant versus the load mN . For the mode 7 and beyond the preload conditions are less than mN = 1, and the seven first modes (form 0 to 6) can be easily modelled by polynomial functions of mN in the neighbourhood of useful mN . These properties open the way to new finite dimension controllers. |
