Experiment and Theory on the Snap-Through Buckling of a Pinned Half-Sine Arch under End Couples

• Main Authors: Chih-Chang Li, 李志章
• Other Authors: 陳振山
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/08600420983937249932

碩士 === 國立臺灣大學 === 機械工程學研究所 === 95 === In this paper we investigate, both numerically and experimentally, both the static and dynamic case, the end couple is applied in the form of a step function with infinite duration. Attention is focused on the prediction of the snap-through buckling loads, both static and dynamic. The relations between the critical load with different initial heights are presented. In the experiment we examine the arch when one end and both ends are affected by moment increased slowly, the change of the height of mid point of the arch, later we amount examined the proportion that the amplitude decayed when the arch mid point was beaten, used for estimating the arch damping coefficient, and quantity examine the arch on strength and receive natural frequency of situation of strength, we amount finally examine the arch happen person who break at the song of frustrating until one end and both ends affect by steps form moment of the step, the behavior that the mid point highly changes over time, and the data won of the testing amount, with taking the place of and entering estimating that contrast each other in result that will be received of simulation of counting value of damping coefficient.