Based on the Sanders thin shell theory and Reddy type shear refined theory, a general refined shell theory is developed in this paper for nonlinear analysis of vehicle pneumatic tires of laminated construction.

A Doubly-Curved Shell Model is presented to analyze free vibrations of pneumatic radial tires based on the general shell theory and Reddy type refined theory with higher-order shear deformation.

The stress analytic method of arch dam covers pure arch method, arch beam sharing method, finite element method, calculating method of shell theory and structural model test method.

The paper analyses the flexible character of shotcreting by means of folium theory with the suggestion of the relationship among flexible characterΔand chamber radius r0 and shotcreting thickness S and the radius deformation formula.

This paper studies the displacement and stress of peripheral joint arch dam, which is based on the theory of shell and the uses of elastic strip element, from which The stiffness matrix of elastic finite strip element and load matrix of equivalent joint line load of arch dam are derived. The computer FORTRAN program and calculation examples are worked out hy the above mentioned method.

The Flügge theory of shell is applied to describe shells' motion. The effects of ring-stiffeners are treated as reverse forces and moments acting on the cylindrical shell.

A new design method for helicoidal girders named LZFEM is developed based on the theory of shell, which is free from the affection of the ratios of centerline radius to width and width to thickness.

For orthotropic circular cylindrical shells in fluid, at the common boundary of outer surface of shells and flow field, velocity potentials are used to describe flow field, the relationship between the hydrodynamic pressure and the radial displacement are given by the continuous conditions of motion and displacement The equations of fluid-structure coupled vibration are made.

Based on the shell-structure theory and through analysis of the flexible characteristics of concrete-shotcrete support,a relation of the compliance of support △,the radius of chamber r_0 and the thickness of concrete-shotcrete t,namely Δ=(r_0~2)/(Et),are obtained;

本文用壳体理论分析了喷射砼支护的柔性特征,得到了支护的“柔度”Δ与洞室半径 r_0、喷层厚度 t 的确定关系,即Δ=(r~2_0)/(Et);

On the shear correction factor in the Timoshenko-type shell theory

Donnell's thin shell theory and basic equations based on the wave propagation method discussed in detail here, is used to investigate the natural frequencies of thin finite length circular cylindrical shells under various boundary conditions.

Another, combined approach uses both the shell theory and the three-dimensional equations of elasticity theory [3, 4].

Shell theory equations consistent with boundary conditions at face surfaces

Shell theory equations consistent with physically meaningful boundary conditions at face surfaces are obtained from the three-dimensional deformable-body mechanics equations related to the reference and actual configurations.

The theory of shell correction developed for discussing fissing of heavy nuclei is applied to symmetric fragmentation of charged metal clusters.

The energy differences between parent cluster and sum of a pair of fragmented clusters are calculated for various fission channels using the theory of shell corrections.

In this paper a kind of rationalism theory of shell is established which is of different mechanic characters in tension and in compression, and the finite element numerical analysis method is also described.

The formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell.

A boundary layer theory of shell buckling was extended to the case of laminated cylindrical shells under hygrothermal environments, and a singular perturbation technique was employed to determine buckling loads and postbuckling equilibrium paths.

It is an efficient way to study arch dams by structural model tests, especially when the valley is unsymmetrical or is surrounded with a complicated boundary. This paper describes the course of the studies of a high, double-curvature, thin-concrete arch dam by structural model tests. The dam is located on an unsymmetrical valley with steep canyon walls. Through several stages of studies and repeated modifications the dam is presented to be five-curvature. arches in the horizontal planes in order to diminish...

It is an efficient way to study arch dams by structural model tests, especially when the valley is unsymmetrical or is surrounded with a complicated boundary. This paper describes the course of the studies of a high, double-curvature, thin-concrete arch dam by structural model tests. The dam is located on an unsymmetrical valley with steep canyon walls. Through several stages of studies and repeated modifications the dam is presented to be five-curvature. arches in the horizontal planes in order to diminish the moments of sections of the arches. Furthermore, the damsite is revised to symmetrical shape both by excavating the left abutment and by constructing massive concrete plugs on the right abutment. The analyses of model tests have confirmed that it is a proper way to modify effectively the stress distribution on the dam to a better state-with no tensile stress and more uniform distribution of compression stresses, so as to permit very efficient structural utilization of the strength of concrete in the dam. The external water load acting on the crown cantilever are checked by the shell theory from the stresses which are measured on the model. The results are well satisfactory.

A general theory for snap-through buckling of an open bimetallic shallow spherical shell under uniform temperature field is presented in this paper. It relates the critical buckling temperature both to physical and geometrical parameters of the shell, including the extent of its central opening as another important factor. Furthermore, they are expressed accordingly by various practical curves. While reducing to the special case of a closed shallow spherical shell, present theory appears to be in good agreement...

A general theory for snap-through buckling of an open bimetallic shallow spherical shell under uniform temperature field is presented in this paper. It relates the critical buckling temperature both to physical and geometrical parameters of the shell, including the extent of its central opening as another important factor. Furthermore, they are expressed accordingly by various practical curves. While reducing to the special case of a closed shallow spherical shell, present theory appears to be in good agreement with earlier work by Wittrick.According to the selection of reference surface of coordinates as suggested by and Radkowski, the basic equations for a double-layered shell are first simplified in forms similar to those of classical shell theory. By analogy, the thermal effect is replaced by an equivalent edge-moment loaded uniformly along both boundaries of the shallow spherical shell. The problem is then solved according to Hu's simplified method, but with some vital modifications. From the results of numerical computations, the paper gives some rather interesting conclusions, which may be valuable in designing the elastic elements of various instruments in engineering.

Giving up the hypothesis of σ_(γγ)= e_(γγ)= e_(αγ)= e_(βγ)=0, which is the well- known hypothesis of indeformable normal of shell surface as usually adopted by the current shell theories, this paper presents a new theory on thermal stresses in shells. Considering the effects of stress σ_(γγ), the stress normal to shell surface due to temperature, some basic relations were derived here for arbitrary shape of shcll. Theyare (1) thermal elastic relations. where and θ_o and θ_i are the temperature increment at outside...

Giving up the hypothesis of σ_(γγ)= e_(γγ)= e_(αγ)= e_(βγ)=0, which is the well- known hypothesis of indeformable normal of shell surface as usually adopted by the current shell theories, this paper presents a new theory on thermal stresses in shells. Considering the effects of stress σ_(γγ), the stress normal to shell surface due to temperature, some basic relations were derived here for arbitrary shape of shcll. Theyare (1) thermal elastic relations. where and θ_o and θ_i are the temperature increment at outside and inside of the shell. (2) equilibrium equations By these relations derived here, we analyzed the thermol stresses in shallow shell for different temperaturc distributions. Consequently, the cooresponding thermal stresses in circular cylindrical shell and plate were obtained. According to this theory the basic equation for plate in the case of μ=0 is ▽~4w-ξ▽~2θ_d-3/h~2ξθ_d =0 while the corresponding equation according to the current theory is ▽~4w-ξ▽~2θ_d=0. Comparing these two theories, we find that the results obtained by the current theory is much smaller than this theory in the case of sinusoidal distribution of θ_d.