An efficient three-dimensional analysis of framed tube structures with arbitrary cross sections, but of uniform panel properties, is presented. It is based on the finite strip method (FSM) and ...involves transforming the discrete structure into an elastically equivalent orthotropic tube. Unlike the usual FSM, the different modes in the stiffness matrix given here are uncoupled. This results in a much smaller matrix, and, consequently, the analysis of the highly redundant framed tube structures can be conveniently and economically handled on a microcomputer. To assess the accuracy of the proposed formulation, two unperforated tubes of rectangular and triangular cross sections are analyzed, and the results are found to be in good agreement with solutions obtained using the finite element method (FEM). As an application, a 30-story framed tube structure is analyzed. Comparison with solutions from a three-dimensional finite element program shows good agreement, with the overall stiffness reasonably well predicted.
The exciting force measuring equipment is designed to transform supporting system of the reciprocating internal combustion engine into the perfect uncoupled system and separate six components of the ...exciting force from the vibration acceleration so that quantitative measurement can be taken. Moreover, as the result of the exciting force calculating programs considering speed fluctuation the calculated value agreed well with the measured value, and thus the property of the calculating method was proved. In addition, the application of the results of calculation to vibration isolation design produced good results on the vibration response prediction, so that the possibility of becoming an effective means in predicting vibration during design procedure was confirmed.
This work is devoted to the study of a two-dimensional vector Poisson equation with the normal component of the unknown and the value of the divergence of the unknown prescribed simultaneously on the ...entire boundary. These two scalar boundary conditions appear prima facie alternative in a standard variational framework. An original variational formulation of this boundary value problem is proposed here. Furthermore, an uncoupled solution algorithm is introduced together with its finite element approximation. The numerical scheme has been implemented and applied to solve a simple test problem.
Mutants of Escherichia coli, harbouring the uncA401 or uncB402 alleles, were found to take up streptomycin more rapidly than the coupled parent strains. The increased rate of uptake results in ...greater sensitivity of the uncoupled strains, compared to the parent strains, to low concentrations of streptomycin. Studies with unc+ revertants showed that hypersensitivity to streptomycin is attributable to the mutation causing uncoupling. The uptake of streptomycin in an unc- strain is abolished by addition of the chemical uncoupler carbonylcyanide m-chlorophenylhydrazone. The phenotype of hypersensitivity to streptomycin can be used as a selection procedure for the isolation of uncoupled strains. In an experiment reported here, nine out of 12 strains isolated as being sensitive to streptomycin (at 2.5 micrograms/ml), were found to be unable to grow on succinate as a sole source of carbon. Five of the nine Suc- strains were found to be uncoupled in oxidative phosphorylation, and two of the five uncoupled strains lacked Mg2+-ATPase activity. The mutations causing uncoupling were cotransducible with the ilv genes.
We apply the conventional consideration of an analytical method in linear thermoelastic problems to nonlinear thermoelastic problems in the second-order theory. The basic equations of nonlinear ...thermoelastic problems are formulated by using Adkins perturbation method. Thermoelastic potentials applying the Helmholtz theorem are also introduced for analyzing nonlinear thermoelasticity problems. Moreover, by applying these thermoelastic potentials, we propose a formulation of the analytical method to solve boundary-value problems of axisymmetrical uncoupled quasi-static thermoelasticity in finite deformations. Finally, some potentials for axisymmetrical thermoelastic problems of finite deformations are shown.
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