Orifice characteristic parameters identification of internal pressure transfer equation for structure with opening
yu shi-ce1, li qing-xiang2 , xü hai-wei１, lou wen-juan１
1.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058,China2. Guangdong Architecture Science Research Center, Guangzhou 510500,China
Abstract：Orifice characteristic parameters identification method of internal pressure transfer equation for structure with opening is studied theoretically and experimentally. Based on the general internal pressure transfer equation considering the nonlinear damping characteristic with two parameters, the orifice characteristic parameters identification method of internal pressure transfer equation for structure with opening excited by sinusoidal wave is investigated. Using time-history method the accuracy of parameters extraction is analyzed in detail, and a special experimental device is developed for orifice characteristic parameters extraction. The results show that extraction accuracy of the extraction method based on the sinusoidal excitation in the vicinity of the resonance peak is reliable, and the reaction of resonance is to ensure the accuracy of the extraction of the orifice characteristic parameters.
2012, Vol. 31 
