加筋粉煤灰的静动强度指标试验与研究

从加筋机理入手，本文建立了加筋土强度的等效侧向约束力模型。分析了加筋粉煤灰静、动强度的拉力破坏和粘着破坏两种情况下的强度指标。理论分析得到了试验结果的验证。  

准高速铁路路基动力响应数值模拟

为了研究高速铁路路基的动力响应,这里模拟秦沈客运专线的路基条件,采用有限元分析方法,计算分析了铁路路基的动力响应(位移)在列车荷载作用下的分布规律,分析了影响路基位移值的各种因素,提出了路基动力响应(位移)随车速变化的双峰现象并分析其成因,最后将数值模拟结果与秦沈客运专线现场动力测试试验数据进行了对比,得出模拟和试验结果规律性一致的结论。  

基于神经网络和遗传算法的光塑性图像处理

本文论述了神经网络、遗传算法结合起来在光塑性图像处理中的应用 ,以楔横轧工序的光塑性图像处理为例 ,三次投射时光塑性图像中各点都有对应的等差线条纹级数和等倾线角度 ,首先利用神经网络建立起图像参数与等效应变之间关系的数学模型 ,然后用遗传算法对图像参数进行优化 ,优化结果与实际情况吻合良好。由此证明神经网络、遗传算法完全可以较好地优化光塑性图像参数 ,并应用于光塑性图像处理领域  

Bending and vibration of composite laminated plates

Hybrid-stress finite element method is applied for analysis of bending and vibration of composite laminated plates in this paper. Firstly, based on the modified complementary principle, a rectangular hybrid-stress plate bending element is presented which applies to analysis of laminates. Inside the element, different stress parameters are assumed according to different layers. The boundary displacements are determined by means of the assumption of YNS theory on the boundary of elements. The element formed in this way not only can take effects of transverse shear deformation and local warping into account, but also has less degrees of freedom. Then, problems of bending and vibration of laminates are solved by using this element, and the numerical results are compared with the exact solutions. This shows that the results obtained in the paper are very close to the exact results.  

Analysis of composite laminated plates

In the static and dynamic analysis of composite laminates, a theory for the laminated plates is presented in this paper. Because the deflection W_b which is caused by the classical bending deformation and the deflection W₅ which is caused by the shear deformation are divided from the total deflection W in the theory, this makes it easy to solve the governing equations. In addition, this theory is convenient for the discussion and analysis of the effects of transverse shear deformations on bendings, vibrations and stabilities of laminated plates.