载荷作用方式及范围对简支圆板反直观行为的影响

采用有限元法，研究了周边简支圆板在不同载荷作用方式和作用面积下的反直观动力响应。分析了加载方式和作用面积对反直观行为的影响，得到了不同载荷下反直观行为的特点，发现了反直观行为时程曲线的反弹次数与相应载荷区间之间的关系。研究结果表明:不同载荷下,反直观行为的变化规律基本相同，但各有其特点；首发反直观行为在整个反直观行为中起着重要作用；用首发反直观动力响应的位移历史曲线可以判断继发反直观动力行为所在载荷区间的最少个数。

Study of the effect of loading modes and areas on anomalous response of elastic-plastic plates

The anomalous response of elastic-plastic circular plate subjected to various rectangle and triangle impulse loadings is studied. The influences of various loading modes and loading areas on the counter-intuitive behavior of the plate are numerically analyzed in detail. The characteristics of the counter-intuitive behavior under different loadings are obtained. The relation between the number of the displacement peaks in the time-displacement curve and the loading range corresponding to the anomalous response is discovered. The results show that the minimum number of the successive counter-intuitive behaviors can be evaluated from the time-displacement curve corresponding to the first counter-intuitive behavior.