AN IMPROVED M-C METHOD AND ITS APPLICATION TO STRUCTURAL RELIABILITY

An improved Monte-Carlo method for the failure calculation of structureis proposed.The present method can determine whether some sample points are in thesafe region without doing structural analysis,so the calculation work is greatly reducedcompared with the ordinary M-C method.Finally,the new M-C method is applied toreliability analysis of frame and the torsional buckling reliability analysis of cylindricalshells.     

层间混杂薄壁圆筒抗弯扭特性的实验研究

对碳纤维与玻璃纤维环氧树脂复合材料，具有０°、±４５°层间混杂铺层的薄壁圆筒在弯一担作用下的力学特性进行了实验研究；解决了试件及其实验专用夹具和测试装置设计与制作的技术问题．本文的方法和结论可为其工程设计与实验测试提供有价值的参考．     

机床热平衡时间参数的实验研究

本文通过对 MMB1412精密半自动万能外圆密床不同零部件、不同部位、处于不同工况及室温下温升及热位移的实际测定,对机床热平衡时间参数的评定方法进行了实验验证,提出了评定该参数的参考建议;并对该磨床的热态性能做出了初步估价。     

柱体扭转稳定蠕变的解析解

应用一变换使柱杆扭转稳定蠕变方程线性化,从而得出了一个解析解     

柱面镜对光栅自成像的旋转

本文运用傅里叶频谱分析方法，研究了柱面镜对光栅自成象的调制作用，发现光栅的自成象不仅周期和位置发生变化，而且产生了方向的旋转。文章分析了其旋转规律。     

柱面波的有限差分解法研究

本文应用有限差分方法,从理论上研究了柱面波在弹性介质中的衰减规律,通过数值计算,得到了应力、应变和位移的衰减指数.     

An exact axisymmetric solution for a simply supported piezoelectric cylindrical shell

Summary Three-dimensional axisymmetric solution is presented for a simply supported piezoelectric cylindrical shell. The variables are expanded in Fourier series to satisfy the boundary conditions at the ends. The solution of the governing differential equations with variable coefficients is constructed as a product of an exponential function and a power series. The coefficients of terms of all degrees in the governing equations are set to zero, yielding a characteristic equation for the exponent and recursive relations for the coefficients of the power series. Results are presented illustrating the effect of thickness parameter of the shell. An inverse problem of inferring the applied temperature from the measured potential difference has been solved. Accepted for publication 26 July 1996     

Static analysis of a long and thick orthotropic circular cylindrical shell of revolution

Summary An elasticity solution has been obtained for a long, thick transversely isotropic circular cylindrical shell subjected to distributed pinch load using a set of three displacement functions. Numerical results are presented for different materials and thickness to mean radius ratios. The results obtained from this analysis have been compared with classical and first-order shear deformation shell theories of Flugge, Sanders, Love and Donnell.     

新型环柱形乙烯基乙酸酯合成催化剂宏观反应动力学

在无梯度反应器中，对上海石化科技开发公司所开发的环柱形乙烯基乙酸酯合成催化剂的宏观反应动力学进行了研究，在与工业操作条件相似的实验条件下，采用幕函数型反应动力学模型对实验数据进行回归和参数估值，得到主，副反应的宏观动力学模型。     

Adsorptive Stripping Analysis of Riboflavin at Electrically Heated Graphite Cylindrical Electrodes

Electrically heated graphite cylindrical electrodes (HGCEs) made from ground pencil leads have been used to perform adsorptive stripping square wave voltammetry (SWV) measurements of trace riboflavin (RF). The SWV stripping peak current was significantly enhanced with increasing the electrode temperature only during preconcentration step. This enhancement was due to the forced thermal convection induced by heating the electrode rather than the bulk solution. It is the thermal convection that has the ability to improve mass transfer and facilitate adsorption thus enhance stripping responses. It was found that the detection limit of 5×10^?9 M (S/N=3) could be obtained at an electrode temperature of 72 °C during 5 min accumulation, more than one magnitude lower than that at 22 °C (room temperature), the sensitivity could be enhanced ca. eight or four folds for two different RF concentration ranges. So it is possible to develop a new highly sensitive method to determine riboflavin at HGCEs. Such HGCEs were also successfully used to determine RF in multivitamin tablets.