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 A finite strip method for calculating the stability and vibration of rectangular plates with nonuniform thickness has been presented in Ref.[1]. It is generalized to calculate axisymmetrical deformations of stiffened cylindrical shells with nonuniform wall thickness and sealed ends on various supports, in this paper. Transmission matrices of a cylindrical shell element and relevant matrices of a circle between elements are developed. Relevant matrices are migrated simultaneously from both ends to the middle... A finite strip method for calculating the stability and vibration of rectangular plates with nonuniform thickness has been presented in Ref.[1]. It is generalized to calculate axisymmetrical deformations of stiffened cylindrical shells with nonuniform wall thickness and sealed ends on various supports, in this paper. Transmission matrices of a cylindrical shell element and relevant matrices of a circle between elements are developed. Relevant matrices are migrated simultaneously from both ends to the middle circle. Finally, it is only necessary to solve one set of binary linear algebraic equations. This method is not only simple and convenient, but also speedy in calculation.  文献[1]用有限板条法求解了变厚度矩形板的稳定与振动问题。本文利用这个基本思想,把它推广到求解在任意支承下带封端和加劲环的变厚度圆柱壳的轴对称变形中去。文中导出了圆柱壳元的传递矩阵和节线的相关矩阵。相关矩阵的迁移同样从两端开始,同时向中间节线延伸。最后,只归结为解一个二元一次代数方程组。这样,计算既简便又迅速。  The finite strip method described in [1] for stability and vibration of rectangular plates with variable thickness is extended to solve the axisymmetrical problems of circular or annular plates with variable thickness and arbitrary supports.Transmission matrices of an annular element and relevant matrices of the circle between elements are derived. similar to the finite strip method, the relevant matrices are to be migrated from both sides of the plate to the central circle. This method is not only simple and... The finite strip method described in [1] for stability and vibration of rectangular plates with variable thickness is extended to solve the axisymmetrical problems of circular or annular plates with variable thickness and arbitrary supports.Transmission matrices of an annular element and relevant matrices of the circle between elements are derived. similar to the finite strip method, the relevant matrices are to be migrated from both sides of the plate to the central circle. This method is not only simple and convenient, but speedy in calculation. It is only necessary to solve one binary algebraic equation set no matter how many elements may be discretized.  文[1]提出了一个求解变厚度矩形板的稳定与振动问题的有限板条法。本文利用这个思想,把它推广到求解任意支承的变厚度圆板和环板的轴对称问题中去。文中导出了环板元的传递矩阵和节线的相关矩阵。在计算过程中矩阵迁移同样是从两端同时向中间节线延伸,这样既简便又迅速。无论离散化的板元有多少块,最后只需解一个二元一次代数方程组。  Investigations were performed on 30 rats. It was divided into 3 groups:(1)transection of spinal dorsal roots(T13,L01,3) of right side, (2) transection of femoral nerve right side and(3) excision of the vertex of urinary bladder. The projections of fiber to the ipsilateral Rolando substance (RS) were localizd by the method for demonstration of acid phosphatase(ACP). It was found that: All the ACP activity in substantia gelatinosa of the middle segment (L1) was lost after transection of dorsal roots, whereas... Investigations were performed on 30 rats. It was divided into 3 groups:(1)transection of spinal dorsal roots(T13,L01,3) of right side, (2) transection of femoral nerve right side and(3) excision of the vertex of urinary bladder. The projections of fiber to the ipsilateral Rolando substance (RS) were localizd by the method for demonstration of acid phosphatase(ACP). It was found that: All the ACP activity in substantia gelatinosa of the middle segment (L1) was lost after transection of dorsal roots, whereas at the upper and lower adjacent segments (T13.L2),the ACP was absent in the lateral part of RS. The observations revealed that the afferent fibers of femoral nerve were projected to the medial half of ipsilateral RS. Hewever the projection from the bladder vertex was quite diffused. The fibers from bladder dispersed mainly to the medial 2/3 of RS at the level L1L3.  将大鼠30只分三组,分别切断右侧三支脊神经背根(T_13,L_1,2)、右侧股神经和膀胱顶部。用ACP法追踪三者在脊髓胶状质内的定位投射。发现切断三支脊神经背根后,中间节段胶状质ACP活性全部消失,首尾节段外侧消失。股神经投射至L_(1～3)节段同侧胶状质内侧1/2部。膀胱顶部主要分散地投射在L(13)节段胶状质内侧2/3的范围。   << 更多相关文摘 
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