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51.
52.
For strengthening bent beams, plates of reinforced plastics are glued to their tensioned surface. As s result, the beam becomes
layered, and it is possible to control its rigidity and deflection. Based on the methods of structural mechanics of layered
media, a method is elaborated for determining the deflection of such beams on the entire range of loading up to their ultimate
failure. A comparison between the theoretical and experimental results is carried out.
__________
Translated from Mekhanika Kompozitnykh Materialov, Vol. 42, No. 1, pp. 45–60, January–February, 2006. 相似文献
53.
Zhi-Chi Zhu 《Acta Mechanica Solida Sinica》1990,3(4):457-468
Researches on sound propagation problems in ducts done by the author and other investigators in recent years are briefly discussed in this paper. The finite difference method used in fluid mechanics is used for solving these problems thus presenting an aspect of the development of research work in this field at home and abroad.The project supported by National Natural Science Foundation of China. 相似文献
54.
一种考虑剪切变形的平行四边形厚/薄板通用单元 总被引:2,自引:0,他引:2
根据Timoshenko二广义位移梁理论,构造了深梁位移场的插值函数。利用斜坐标系与直角坐标系的变换关系、有限条带思想和深梁位移插值函数,构造了一种考虑剪切变形的平行四边形厚/薄板弯曲通用单元的位移(曲率、剪应变、转角、横向位移)插值函数,导出了刚度矩阵和非结点荷载等效力。并对简支阍支方板、Razzaque斜板、四边简支斜交板弯曲进行了数值计算。算例表明此单元有较好的精度,对于薄板不出现剪切闭锁,可适应于目前桥梁建设中大量采用的斜交板桥结构分析。 相似文献
55.
An analytic solution is obtained for forced convection flow in a parallel-plates channel or a circular duct occupied by a
hyper-porous medium saturated with a rarefied gas in the slip-flow regime, for the case of uniform flux boundary conditions.
As expected, it is found that velocity slip leads in general to increased heat transfer and temperature slip leads to reduced
heat transfer. 相似文献
56.
BENDING SOLUTION OF A RECTANGULAR PLATE WITH ONE EDGE BUILT-IN AND ONE CORNER POINT SUPPORTED SUBJECTED TO UNIFORM LOAD 总被引:3,自引:0,他引:3
BENDING SOLUTION OF A RECTANGULAR PLATE WITH ONE EDGE BUILT-IN AND ONE CORNER POINT SUPPORTED SUBJECTED TO UNIFORM LOADXuQilo... 相似文献
57.
Computational study of shock wave focusing in a log-spiral duct 总被引:1,自引:0,他引:1
The mechanism of shock wave focusing in a two-dimensional log-spiral duct has been investigated here numerically using a finite volume method. This approach is based on a MUSCL TVD scheme with flux-vector splitting applied to the Euler equations. The isopycnics determined from the calculations are compared with the experimental results obtained by use of holographic interferometric photography and are found to be in excellent qualitative agreement with the experiments. The computational results clarify the details of the wave interactions very near to the focus. In particular, phenomena such as the formation of secondary shock waves prior to the implosion, their interaction with the reflected shock and the formation of vortices after the implosion have been examined. 相似文献
58.
本文详细地研究了厚度h=h_0ξ~的圆柱壳的轴对称弯曲问题.文中通过引入一个位移函数H(ξ),将该问题的方程组化成一个关于H(ξ)的6阶常微分方程,用广义超几何函数给出问题的精确解. 相似文献
59.
The complete integral of the system of partial differential equations governing the equilibrium bending of elastic plates
with transverse shear deformation and transverse normal strain is constructed by means of complex variable methods. The process
helps to elucidate the physical meaning of certain analytic constraints imposed on the asymptotic behavior of the solutions
and shows that in the case of an infinite plate, any analytic solution has finite energy if and only if the bending and twisting
moments, the transverse shear force, the displacements in vertical planes, and two other characteristic quantities vanish
at infinity. An example is discussed to illustrate the theory. 相似文献
60.
热/机械载荷下功能梯度材料矩形厚板的弯曲行为 总被引:5,自引:2,他引:5
采用Reddy高阶剪切板理论,考虑材料物性参数随坐标和温度变化的特性,研究在均匀变化的温度场内功能梯度材料矩形板在面内与横向载荷共同作用下的横向弯曲问题,基于一维DQ法和Galerkin技术,给出了一对边固支,另对边任意约束时板弯曲问题的半解析解,以Si3N4/SUS304板为例考察了材料组份,温度场,面内载荷及边界约束条件等对功能梯度材料板弯曲行为的影响。 相似文献