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前言轻质、高承载能力的壳体结构,是工程技术人员所追求的目标,FRP等网格加劲圆柱壳就是这样一种壳体结构。这里所说的“等网格”指由加劲构件组成的三角形网格肋,在宏观上具有各向同性性能。由于是加劲结构,它主要应用在抗屈曲结构中。对一般的加劲壳体进行总体屈曲分析时,所涉及的主要问题是如何计算加劲壳的宏观弹性性能。在具体分析时,往往采用线性分析或非线性分析。其中非线性分析包括有物理非线性、几何非线性和物理及几何非线性分析。一般地,在线性分析中理论解析式较为简单,但往往理论值与实测值的偏差较大,在工程上需要做出某种修正。当采用非线性分析时,虽然可推导出较为精确的理论解析式,但对于各向异性材料这种解析式一般较冗长,给计算带来极大不便。
Preface The lightweight, high-load-bearing shell structure is the goal pursued by engineers and technicians. The stiffened cylindrical shell such as FRP is such a shell structure. As used herein, “equal grid” refers to a triangular grid of stiffeners that is macroscopically isotropic. Because it is stiffened structure, it is mainly used in anti-buckling structure. The main issue involved in the overall buckling analysis of a typical stiffened shell is how to calculate the macroscopic elastic properties of the stiffened shell. In the specific analysis, often using linear analysis or nonlinear analysis. The nonlinear analysis includes physical nonlinearity, geometric nonlinearity and physical and geometric nonlinear analysis. In general, the theoretical analysis of linear analysis is relatively simple, but often deviate from the theoretical value and measured values, in engineering need to make some kind of amendment. Although non-linear analysis can be used to derive a more accurate analytical solution, the analytical solution for anisotropic materials is generally more verbose, which brings great inconvenience to calculation.