Wyniki wyszukiwania - BazTech

1

Apply to the Township's Small Substation

Ding S., Xiao L., Huang R., Liu J., Yang S., Chai X.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

13--14

EN

This paper designed a small terminal of a 35kV substation; it can meet the substation area electricity and the future development of the needs of the vision of growth in electricity demand. The article presents the design of transformers, substation main connection, and lightning protection. The practice shows that it applies to the township (town) of agricultural load and small-scale processing enterprises in electricity.

PL

W artykule przedstawiono projekt przyłącza podstacji elektroenergetycznej 35kV. W opisie uwzględniono projekt transformatorów, głównego przyłączenia podstacji oraz ochronę odgromową. W praktycznym ujęciu, projekt może mieć zastosowanie w rejonach agroturystycznych i niewielkich zakładach.

2

Intelligent Digital Multi-purpose Vehicle Instrument

Ding S., Li J., Xiao L., Huang R., Yang S.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 5b

64-67

EN

This paper analyzed and studied the development and needs of the vehicle instrument. By the electronic circuit and microcontroller technologies it achieved the high-precision digital display of the speed, and the mileage and the fuel, and also this vehicle instrument realized the function of password protection, and alcohol concentration detection and reversing radar measuring the distance. Practice shows that the digital vehicle instrument has an intuitive digital display and high intelligence.

PL

Przedstawiono nowy inteligentny mikroprocesorowy instrument pokładowy samochodu. Instrumetn pozwala nie tylko mierzyć prędkość i dystans, ale także wykrywa obecność alkoholu i działanie radaru.

3

Stress distribution in the material and development of loads on the wall during hopper filling

Ding S., Enstad G. G.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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2003

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Vol. 7, No 4

513-524

EN

Stress distributions developing in granular materials in hoppers during the process of filling is fundamental for an understanding of the phenomena observed in hoppers. Predictions of such stress distributions are therefore essential. In this paper, based on a model which was created to simulate various filling procedures, an (ABAQUS) analysis has been carried out to investigate the development of stress distribution in the material and the loads on the hopper wall when the hopper is filled by the concentric-filling method. Calculations have been carried out either according to a procedure known as "switch-on" or according to the so-called layer-by-layer procedure. It was found that the maximum stress developed at the end of the filling, not at the bottom, but somewhere in the lower area of the hopper (layer 3). The stresses developed during layer-by-layer filling were greater than those developed during the switch-on filling in the lower area of the hopper, but were smaller in its upper area. Maxima of normal pressure along the wall were not at the outlet, even from the very beginning of filling. Instead, it was located at a position around 2/5 of the length of the wall from the outlet when the filling was finished. Various filling methods would have an effect on the stress distribution within the material and, consequently, affect the type and magnitude of loads on the hopper wall, and particularly at the hopper outlet.

4

Loads on walls and inserts in a mass-flow silos

Ding S., Wójcik M., Jecmenica M., Silva de S. R.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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2003

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Vol. 7, No 4

525-538

EN

A finite element analysis has been carried out to investigate flow patterns and loads on silos either with a ralatively steep hopper, or with a shallow hopper but in the presence of an insert. A Lagrangian-Eulerian approach was first adopted to simulate the material flow pattern, with the precondition that mass flow was obtained. It was then attempted to predict the loads exerted by granular materials on the walls of such silos. The load on the insert was also simulated. Techniques such as the adoption of adaptive meshes and filleting along sharp corners were applied in the analysis to overcome the difficulties usually encountered with large deformations in the FEM and the mathematic singularity presented by the abruptness of geometry. Filleting proved to be necessary to bring down the pressure peak at the transition level. The insert took over a significant part of the loads. Comparison with the classic theories have confirmed that the loads predicted on the wall agree quite well with the theoretical results in the silo's cylinder section, but that differences exist in the hopper section; the difference is greater when the hopper is shallower. It has also shown the limitations of predicting flow patterns of granular materials with the traditional elastic-plastic model; a more advanced model is needed.