摘要
PolyMAX是近几年发展起来的宽频带模态参数识别算法,该方法在抗干扰能力、识别密集模态、以及处理大阻尼复杂结构方面具有非常好的特性。通过避免缩减正则方程计算中的矩阵求逆以及乘法运算,实现了该算法的快速实现。最后采用七自由度仿真算例与航空发动机涡轮盘实测算例进行验证。结果表明:快速实现能够在对识别精度影响很小的情况下显著提高参数识别速度。
PolyMAX is a broadband modal identification algorithm developed in recent years.It has many advantages in handling highly noisy data,closely coupled modes and high damping structures.A fast implementation of PolyMAX was achieved by avoiding matrix inversion and multiplication in calculating reduced normal equations.A simulation case of a seven-DOF system and an application case of a gas turbine disk were used to validate the fast implementation.The results showed that fast implementation can speed up modal identification significantly with little accuracy loss.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第10期6-8,18,共4页
Journal of Vibration and Shock
关键词
模态参数识别
PolyMAX算法
缩减正则方程
快速实现
稳定图
modal parameters identification
PolyMAX algorithm
reduced normal equation
fast implementation
stabilization diagram
