摘要
基于对智能层合板结构的模态分析,提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。介绍了压电模态传感器的实现原理,并给出了由实测压电单元输出得到结构模态响应的计算公式。采用无条件稳定的精细逐步积分法求解结构的模态动力学微分方程,构造了通过结构的模态响应反求荷载列阵的迭代算法。该方法作为动态激励的压电模态响应易于实时监测,迭代过程简单可靠、计算速度快、识别精度较高,适用于任意形状和边界条件的复杂型智能结构。实例表明了该方法的可行性。
Based on modal analysis of piezoelectric smart laminated plates, a finite element inverse algorithm for identifying the time history of impact loads from piezoelectric modal responses is presented. The principle of piezoelectric modal sensor is introduced and the formulas for calculating modal responses according to measured piezoelectric outputs are gained. The highly precise direct integration scheme is used for solving modal dynamic differential equation of the structure nd a dynamic load identification method by the modal responses is proposed. The method is simple, credible and has high precision and rapid calculation speed. An example of identifying impact loads shows the method is effective.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第5期8-10,共3页
Journal of Vibration and Shock
基金
国家自然科学基金(10072026
50135030)
航空科学基金(01G52041)项目资助
关键词
智能板
压电模态
逐步积分法
Differential equations
Dynamics
Finite element method
Identification (control systems)
Modal analysis
Piezoelectric materials
Plates (structural components)
