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移行铰
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     The influences of dampingmedium on the motion of plastic hinge zone are considered in structural moving stage under highloading.
     在结构物高载阶段的运动中,考虑了阻尼介质对塑性移行的影响。
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     cell growth, migration and differentiation;
     细胞的生长、移行和分化;
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     Study of Concrete Hinge
     关于混凝土的研究
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     Improvement of Strategy for Data Migration
     数据移行策略改进
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     On Hu Dingjiao
     胡钉
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In this paper, the problem of a thin circular arch, with clamped ends, subjected to symmetrical impact by a concentrated mass, is investigated on the basis of rigid-perfectly plastic and inextensible assumptions. This analysis takes account of the travelling of plastic hinges. In fact, the model of the dynamic deformation is a five-hinge one. This system is of onedegree-of-freedom. The analysis indicates that the charactersistics of the dynamic response of circular arches is not similar to that of cantilever...

In this paper, the problem of a thin circular arch, with clamped ends, subjected to symmetrical impact by a concentrated mass, is investigated on the basis of rigid-perfectly plastic and inextensible assumptions. This analysis takes account of the travelling of plastic hinges. In fact, the model of the dynamic deformation is a five-hinge one. This system is of onedegree-of-freedom. The analysis indicates that the charactersistics of the dynamic response of circular arches is not similar to that of cantilever beams, because the travelling hinges cannot reach the base of the arch. The response time and the final deflection of the impinged point increase with the mass ratio α.

本文采用刚塑性假定和拱轴线不可伸长的假设,考虑塑性铰的移动,对受集中质量对称撞击的固支深圆拱的动力响应进行分析。由于把问题简化为一个自由度系统的运动,使得整个运动过程可以较方便地计算出来。计算结果表明,深圆拱的动力响应特性不同于悬臂梁,移行铰不可能到达拱脚,输入的能量全部消耗在塑性铰的移动过程中。结构的响应时间和撞击点的最终位移随撞击物与拱之质量比的增加而增大。

The residual plastic deformation for the clamped dented steel tubular beam under lateral impact is investigated by using the method of dynamics of plasticity. The material of the tube is assumed to be rigid-plastic. The result of analysis shows that the residual deformation configuration of the beam tends to be linear distribuation with the increase of the impact mass. It is slao found that the degree of dented depth has no influence to the dissipated energy in the moving hinge period.

应用塑性动力学的方法,分析了带有局部凹陷的固支钢质圆管受横向碰撞时的残余塑性变形,假定圆管为刚塑性材料,分析表明,随着碰撞质量的增加,圆管的残余变形形状趋于直线分布,而且凹陷程度不影响移行铰阶段所耗散的能量.

In this paper,the rigidperfectly,plastic dynamic response of a freefree beam subjected to impact by a projectile at the free end and the midspan crosssection is presented.The influence of some parameters such as input energy and mass ratio on the final deflection,travelling plastic hinge position and energy partitioning of the beam are discussed.

研究自由边界的矩形截面梁在自由端和对称中面分别受到质量块横向撞击后的刚-塑性动力响应,通过完全解分析、结合数值方法给出梁的瞬态变形,并讨论输入能量、质量比等参数对梁的最终变形、移行铰消失位置及能量耗散的影响。

 
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