以遺傳演算法鑑別振動平板之邊界參數

Boundary Parameter Identification of Vibrating Plates by Using Genetic Algorithm

楊大中(Ta-Chung Yang) ； 何信宗(Shin-Tzung Ho)

《先進工程學刊》 4卷4期 (2009/10) Pp. 325-330

https://doi.org/10.29948/JAE.200910.0003

摘要

在振動平板之邊界條件探討上，運用傳統板殼理論求解時，統御方程式相當複雜且求解過程繁雜。而以有限元素法探討平板邊界條件時，當網格分割較密後，又會使得邊界的接點參數增多，增加鑑別的困難。本研究主要是以遺傳演算法，結合有限元素分析軟體與振動實驗之頻率響應函數訊號，針對單一頻率之多接點參數進行鑑別，以了解接點參數與頻率之間的關係。本文利用受楔型夾持器拘束的振動平板為例子，驗證本文所提出的接點參數鑑別程序，確實可應用於實際案例上，且在多接點參數之鑑別上成效良好。

關鍵字

邊界參數鑑別 ； 遺傳演算法 ； 頻率響應函數 ； 有限元素法

並列摘要

Traditional investigations using analytical approaches on the boundary conditions of vibrating plats by are very complicated. Meanwhile, the increasing number of boundary parameters with finer meshing by finite element modeling degrades the accuracy of identification results. This research work identifies the multiple boundary parameters of vibrating plates at a single frequency by using genetic algorithm method, combined with finite element modeling and frequency response functions of vibration experiments. Plates clamped by wedge-lock retainers are investigated, and the results show that the identification process proposed in this work is effective and could be applied in industrial cases.

並列關鍵字

parameter identification ； genetic algorithm ； frequency response function ； finite element