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RADIAL VIBRATIONS OF AXISYMMETRICALLY LOADED STEPPED PRESSURE VESSELS
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作者 张英世 马致祥 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第1期105-109,共5页
Differential equations of free/forced radial vibrations of axisymmetrically loaded stepped pressure vessels are established by using singular functions. Furthermore, their general solutions are solved, the expression ... Differential equations of free/forced radial vibrations of axisymmetrically loaded stepped pressure vessels are established by using singular functions. Furthermore, their general solutions are solved, the expression of vibration mode function and frequency equations on usual supports are derived with W operator and the forced response of such vessels are calculated. 展开更多
关键词 axisymmetrically loaded stepped pressure vessel radial vibration free vibration forced response
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Simplified method for predicating consolidation settlement of soft ground improved by floating soil-cement column 被引量:12
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作者 龚晓南 田效军 胡文韬 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2699-2706,共8页
A simplified method is presented for predicting consolidation settlement of soft ground improved by floating soil-cement column on the basis of double soil-layer consolidation theory. Combining the axisymmetric consol... A simplified method is presented for predicting consolidation settlement of soft ground improved by floating soil-cement column on the basis of double soil-layer consolidation theory. Combining the axisymmetric consolidation model and equal strain assumption, the governing equation was derived for the consolidation of clayey subsoil reinforced by soil-cement column. By modifying the boundary condition of the interface between the improved layer and underlying layer on seepage and pore-water pressure, the analytical solution of consolidation of soft ground improved by floating soil-cement column was developed under depth-dependent ramp load. The results of the parameter analysis of consolidation behavior show that the consolidation rate is closely related with the depth replacement ratio by the column and the permeability of upper layer. The influence of column-soil constrained modulus ratio and radius ratio of the influence zone to the column on consolidation is also affected by depth replacement ratio. The column-soil total stress ratio increases with time and approaches the final value accompanied with the dissipation of excess pore water pressure. 展开更多
关键词 axisymmetric consolidation model floating soil-cement column consolidation depth-dependent ramp load analytical solution
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Evolutions of Compaction Bands of Saturated Soils
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作者 鲁晓兵 王义华 崔鹏 《Journal of Shanghai University(English Edition)》 CAS 2004年第3期281-285,共5页
The development of compaction bands in saturated soils, which is coupling-rate, inertial and pore-pressure-dependent, under axisymmetric loading was discussed, using a simple model and a matching technique at the movi... The development of compaction bands in saturated soils, which is coupling-rate, inertial and pore-pressure-dependent, under axisymmetric loading was discussed, using a simple model and a matching technique at the moving boundary of a band. It is shown that the development of compaction bands is dominated by the coupling-rate and pore-pressure effects of material. The soil strength makes the band shrinking, whilst pore pressure diffusion makes the band expand. Numerical simulations were carried out in this paper. 展开更多
关键词 axisymmetric loading saturated soil matching technique compaction band.
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ON THE LIAPUNOV’S STABILITY OF A CLAMPED ORTHOTROPIC ROUND PLATE UNDER RADIAL AXISYMMETRICAL IMPACTLOAD
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作者 揭敏 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1996年第2期149-153,共5页
Liapunov's 2nd method is applied to analyse the Stability of a ciamped poleorthotropic round plate acted by a radial axisymmetrical impact load on its periphery. The analysis is carried cut under the assumptions o... Liapunov's 2nd method is applied to analyse the Stability of a ciamped poleorthotropic round plate acted by a radial axisymmetrical impact load on its periphery. The analysis is carried cut under the assumptions of small deflection and elasticity The impact load is supposed to have a step impulsive form. A sufficient stability condition is given. 展开更多
关键词 axisymmetrical. impact load. round plate. Liapunov's stability
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Analytical layer-element solutions for a multi-layered transversely isotropic elastic medium subjected to axisymmetric loading
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作者 Zhi-yong AI Nai-rui CANG Jie HAN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2012年第1期9-17,共9页
This paper presents an analytical layer-element method used to analyze the displacement of a multi-layered transversely isotropic elastic medium of arbitrary depth subjected to axisymmetric loading.Based on the basic ... This paper presents an analytical layer-element method used to analyze the displacement of a multi-layered transversely isotropic elastic medium of arbitrary depth subjected to axisymmetric loading.Based on the basic constitutive equations and the HU Hai-chang's solutions for transversely isotropic elastic media,the state vectors of a multi-layered transversely isotropic medium were deduced.From the state vectors,an analytical layer element for a single layer(i.e.,a symmetric and exact stiffness matrix) was acquired in the Hankel transformed domain,which not only simplified the calculation but also improved the numerical efficiency and stability due to the absence of positive exponential functions.The global stiffness matrix was obtained by assembling the interrelated layer elements based on the principle of the finite layer method.By solving the algebraic equations of the global stiffness matrix which satisfy the boundary conditions,the solutions for multi-layered transversely isotropic media in the Hankel transformed domain were obtained.The actual solutions of this problem in the physical domain were acquired by inverting the Hankel transform.This paper presents numerical examples to verify the proposed solutions and investigate the influence of the properties of the multi-layered medium on the load-displacement response. 展开更多
关键词 Transverse isotropy Analytical layer element Multi-layered elastic medium Axisymmetric loading Hankel transform
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