对一定边界条件下的变截面Beck杆,通过在其表面特定位置粘贴压电片,并施加电场于压电片来提高其稳定性。建立了含端部集中质量的压电层合变截面Beck杆的计算模型,导出分段表示的运动微分方程。利用微分求积法分析了压电片几何物理参数对Beck杆的动态稳定性的影响。研究结果表明,粘贴压电片可以有效提高Beck杆的稳定性。
To improve the stability of a varying cross-section Beck’s column with certain bounda-ry conditions,an external voltage was applied on the piezoelectric layers bonded on the surfaces of Beck’s column.The mathematical model of the piezoelectric composite varying cross-section Beck’s column was established and the differential equations of motion were derived.With DQ method,the effect of geometrical and physical parameters of piezoelectric layers on the stability of varying cross-section Beck’s column were studied.Stability of Beck’s column can be improved by the piezoelectric layers.