การประมาณค่าตัวแปรทางพลศาสตร์ของเจดีย์วัดอุโมงค์ด้วยวิธีการวิเคราะห์ย้อนกลับผ่านวิธีประวัติเวลา

Abstract

The objective of this research is to estimate dynamic parameters of Umong stupa using inverse analysis through time history method. The accelerations response of Umong stupa was measured at the base and top positions. The fundamental frequency of stupa was estimated by Fourier analysis of measured acceleration response. Then, The values of fundamental frequency and damping coefficient were re-computed from the inverse analysis technique through Newmark’s time stepping method. The result shows very close value of fundamental frequency from Fourier analysis versus inverse analysis technique.