Bifurcated point elastic and elastic-plastic lateral bucklingcritical loads of single beam and girder truss of bridging machine are computed with the helpof Potential Energy Stationary Principle,The Numerical results are compared with classicalsolutions of single-span beam.

This article introduces the results in calculating and comparing the maths model between single-span beam and multispan beam in the design of anti-wind pressure for curtain wall' s vertical column.

CALCULATING AND COMPARING THE MATHS MODEL BETWEEN SINGLE-SPAN BEAM AND MULTISPAN BEAM IN THE DESIGN OF ANTI-WIND PRESSURE FOR CURTAIN WALL' S VERTICAL COLUMN

Bifurcated point elastic and elastic-plastic lateral bucklingcritical loads of single beam and girder truss of bridging machine are computed with the helpof Potential Energy Stationary Principle,The Numerical results are compared with classicalsolutions of single-span beam.

The vibration mode functions and frequency equations of laminated continuousbeam during nature vibration are obtained in this paper on the basis of considering many--spanlaminated beam as single-span beam by using laplace transform

Byusing the reciprocal displacement theorles,the relationship between the deflection and the angles of the rotation and the principles of the supersition, it was convenient to find the displacement at any point and the angles of the rotation at any cross section of the single span beam through by means of the deflection curve equation.

As prestressed wire prolongs multispan and multiwave,the loss of prestress due to friction between the wire and hole is more server than in single span beam.

This paper demonstrates that,calculation formulas and pictures of theinternal force of single span beams in rectangular nonuniform section are verysimple in actual engineering.

Second, we analyze, in terms of weak localization of EP's, the coherent light emission in the direction normal to the surface under a single beam pumping tilted from the normal to a planar semiconductor microcavity.

A highly efficient summing of mutually coherent beams (channels) into a single beam with the same divergence and aperture (an inverse acoustooptic problem) is realized via diffraction in a Bragg cell.

It is shown for the first time that holograms can be rewritten by a single beam of incoherent light without an accompanying growth of the frequency of the carrier fringes of the rewritten holograms.

The spectral combination characteristic of a grating is the capability of combining multiple light beams of different wavelengths incident from specific angles into a single beam.

The results show that the double beam technique eliminates instrumental drift in the single beam measurement and therefore the stability of the system increases by more than 20%.

The bridge is modeled as a single span beam with even and uneven decks.

The significance of prefailure joint dilatancy is investigated by means of a simple analysis of a single span beam.

In nuclear reactor engineering, the vibration of fuel element rod aud tube of heat exchanger is frequently induced by coolant flow. They always strike intermediate supporting baffles during their vibration. This kind of impact is intermittent and repeated. As a result, the wear and fretting of tube will be created and the damage would be caused finally. Therefore, it is very important to study dynamic effect of this impact. Recent years, the investigation for this problem has been made by some authors.The dynamic...

In nuclear reactor engineering, the vibration of fuel element rod aud tube of heat exchanger is frequently induced by coolant flow. They always strike intermediate supporting baffles during their vibration. This kind of impact is intermittent and repeated. As a result, the wear and fretting of tube will be created and the damage would be caused finally. Therefore, it is very important to study dynamic effect of this impact. Recent years, the investigation for this problem has been made by some authors.The dynamic effects of impact for a tube with fixed ends against multiintermediate supports have been studied experimentally and analytically in this paper. The tested model is a stainless steel tube of 13.20 mm O. D., 10.20 mm I. D. and 1436 mm in length. Its ends are clamped. The baffles are simulated with support plates.Their number is up to three and their positions are adjustable. The rigidities of support plates are different. The clearances between the tube and plates are in the range from 0.20mm to1.00 mm. The tested tube is exited by unload The duration and number of times for impact, and time-history of response of the tube motion are recorded.The test results show the tube dominantly vibrates in the form of beam with single span, but the fundamental frequency is higher than its first natural frequency. The curve of the ratio of fundamental frequency of response to first natural frequency of beam vs. the ratio of initial displacement to clearance is given. Also the curve of the duration for contact with support vs. initial displacement-clearane ratio is obtained. The calculation is made by the theory of beam vibration. The analytical and experimental results are in good agreement. Many components of higher frequency are introduced into the response of motion. Their frequencies depend upon the position of support and their magnitudes are relative to intensity of impact. The linear spectrum of frequency for the motion response is given by Fourier Analysis.

The present Paper,based on a study of the Simple cross beams under different loads and varied boundary conditions,analysizes the conditions of the joints between the section of beam,to draw a formula which makes it possible for the computer to calculate the continuous beam flexivity under linear loads.

In this paper, the effect of loading forms and supporting types on the ultimate stress of unbonded prestressed tendons is analyzed by using the coefficients of loading and supporting condition in thedeflection formula of onespan beams. Analysis results show that the accuracy and the available range of formulas to calculate the ultimate stress of unbonded prestressed tendons, which are used in practical design now, would be limited without considering those factors.