钢桥面铺装粘弹性力学分析

由动态力学试验数据通过粘弹性力学关系式转换,得到用Prony级数进行数值表征的广义Maxwell模型参数。在此基础上,以九江长江公路大桥为例,通过有限元建模,模拟分析荷载-温度耦合作用下钢桥面铺装面层表面的应变状态,计算得到典型温度下4种铺装结构表面最大横向弯拉应变及其分布特征。结果表明,某温度下的一个加载过程中,任一荷位出现最大表面横向弯拉应变的位置在横断面上的分布是不同的,而双层环氧沥青混凝土铺装结构增加Eliminator防水粘结层可有效降低铺装表面最大横向拉应变。     

基于Maxwell 2D的电动斥力操作机构动态特性仿真

基于Ansoft公司的Maxwell 2D软件对电动斥力操作机构进行二维建模仿真,分别对无续流二极管和有续流二极管的放电电路进行了分析,得出了相应结论,对于研究电动斥力机构的特性有一定参考价值.     

Exact Solution of Unsteady Flow of Viscoelastic Fluid in a Pipe with Fractional Maxwell Model

The unsteady flow of viscoelastic fluid in a cylindrical pipe was investigated using the fractional Maxwell model. Two special cases of unsteady pipe flow were expressed. The first is start-up flow, and the second is oscillating flow. The exact solution of start-up flow under a constant pressure gradient was obtained by using the theories of Laplace transform and Fourier-Bessel series for fractional derivatives. The exact solution of oscillating flow was obtained by utilizing the separation of variables.