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Since the early 1970s, the accidental damage of small bore piping has been frequently reported. When an accident occurs, an immediate response is not currently possible, because maintenance and repairing technology are not institutionalized in KOREA. Purpose of this research is to develop an online repairing technology for socket welded in a nuclear power plant using development technology by KOREA...
Magnetostriction of grain-oriented 3% SiFe sheets was measured prior to assembly into model transformer cores. Core vibration was measured using a laser scanning vibrometer and harmonic spectra of acoustic noise were evaluated from the microphone outputs. Explanations show why no correlation exists between vibration harmonics profiles and A-weighted acoustic noise spectra. High localized vibration...
The reinforced concrete hybrid structure is a new special industrial structure in large thermal power plants. It is composed of a spatial steel truss and reinforced concrete tubular columns. Its stiffness and mass is highly non-uniform at vertical direction. Its mechanical behaviors are complicated. There aren't any codes relating to these structures in China, and even there are few references on...
The problems existing in domestic super-heavy vibrating screens have been deeply analyzed. Research on 2YAC2460 super-heavy vibrating screen through modern designs, the three-dimensional entity design, modeling of elements and assemblies have been done. Besides virtual prototype design and analysis and innovative processing have also been made. After realizing introduction, digestion, absorb and research...
Using ANSYS, static analysis and dynamic analysis were made for a certain large-scale linear vibrating screen structure, weak links were found out in structural design. The improved schemes were proposed for vibrating screen structure. The static and dynamics analysis's results of each schemes were compared, the optimal improved scheme was obtained. It is shown that, in the vibrating screen structure,...
Numerous connections brittle fracture happened in the Wenchuan Sichuan earthquake, which indicates that cognitions on the damage mechanism of beam to column connection are rather inadequate. It need to improve in constitution, there are four kinds of connections are analyzed by the finite element. Under the repeat load, which seismic behavior of improved connections are better and can satisfy the...
The model of ultra-heavy vibrating screen has been established by using finite element analysis software ANSYS, the stress distribution of the screen box has been revealed under static load, meanwhile, analyses dynamic characteristics of the screen box structure for ultra-heavy vibrating screen, then, has gotten the low order natural frequency and vibration mode of the screen box, and the stress distributions...
An important source of transformer noise is magnetostrictive vibration of the magnetic core. This paper outlines some important effects of mechanical building stress on magnetostriction. Harmonic analysis of magnetostriction is necessary to quantify its influence on acoustic noise but it implied here that the most important magnetostrictive parameter has not yet been identified. A route is proposed...
The steel-concrete hybrid structure is a new special industrial structure in large thermal power plants. It is composed of a spatial steel truss and steel-concrete tubular columns. Its stiffness and mass is highly non-uniform at vertical direction. Its mechanical behaviors are complicated. There aren't any codes relating to these structures in China, and even there are few references on them until...
Relaxor-based ferroelectric Pb(Zn1/3Nb2/3)O3 -(6-7)%PbTiO3 single crystal of [110]Ltimes[001]T(P) cut exhibits high d31 and low s11E values, making it candidate for piezoelectric energy harvesting. In this work, a cantilever piezoelectric power generator using this crystal cut has been designed and fabricated. The device is designed for 110 Hz of resonance. The peak voltage generated from the prototype...
Frameless thin film photovoltaic module is mounted to metal rails by acrylic tape. Theoretical and FEA simulation show that the bonded rail mounting configuration can be modeled as beam series consisting of cantilever beams and fixed-fixed beams. A design rule was found for the relationship between tape-to-tape spacing and tape to glass edge spacing. The optimized mounting solutions were obtained...
Based on finite element method and ANSYS software, vibration feeder is fatigue break influenced by exciting force alternate load. This paper introduces the rational finite element model of vibration feeder. It discusses harmonic response analysis and discovers weak links which is angle steel junction of side plate, feed inlet and junction panel between no feed side plate and bottom plate then makes...
Riding chip scale packages (CSPs) in the z-direction enables high-density 3D electronic packaging in which the shorter, through-interposer interconnections can provide faster signal transmission and integrity. Successful applications of such 3D stacking packages require a better understanding of their mechanical responses to and reliability under various loading conditions. In this paper, we present...
Variant-frequency vibration cropping is a new approach of low-stress manufacturing technology, which utilizes the stress concentration effect of V-shaped notch to realize the regular fracture of metal bar under conditions of low cycle fatigue. The material fracture process has a great effect on the manufacturing quality obtained by this cropping method. Aiming at the geometric shape of fracture surface...
The method of account of internal dispersion of energy is offered. On the example of two electromechanics transformers verification of its fitness is realized to the practical calculations and subsequent design after other criteria. Certainly method of quantitative and high -quality estimation of transformers after dispersion energies, found them main power parameters.
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