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central angle
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  中心角
    Compared with the measured values of the burden profile on blast furnace No. 2 in Xiangtan Iron and Steel Company,the values of the Peripheral angle and central angle of burden profile calculated in our mathematical model are in agreement with the actal measured values.
    与湘钢2#高炉实测料面值比较,用本数模计算出的料面边缘角和中心角与实测值基本一致。
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  central angle
Initial data obtained show the critical buckling pressure to vary as a power of the thickness and almost linearly with central angle.
      
Parameters examined included thickness, central angle and toroidal radius.
      
The desired functions are represented by the product of a power function of the radial coordinate and the unknown function of the central angle in the cross section.
      
The lack of 13-day periodicity in the solar 10.7 cm flux is caused by its broad central angle dependence that averages out the 13-day variations and produces nearly sinusoidal 27-day variations.
      
The critical pressure is expressed explicitly by a function of the radius of the inclusion and the central angle sublended by the half length of the crack; especially it is inversely proportional to the square root of the radius of the inclusion.
      
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First of all, this paper introduced strian functions in the plane of flange slab and expounded that its normal stress of the cross section varied with the third power parabola distribution. Sccondly.by means of the variational principle the paper presented differential equations to obtain computational formulas of shear lag effect in curved box girder bridges. Finally, based on the above analysis, graphs of shear lag coefficient were organized in accordance with span width ratio and central angle of curvature....

First of all, this paper introduced strian functions in the plane of flange slab and expounded that its normal stress of the cross section varied with the third power parabola distribution. Sccondly.by means of the variational principle the paper presented differential equations to obtain computational formulas of shear lag effect in curved box girder bridges. Finally, based on the above analysis, graphs of shear lag coefficient were organized in accordance with span width ratio and central angle of curvature. These graphs were of practical value. The theoretical formulas given in the paper were general formulas of straight and curved box girder bridges.

首先,本文提出了翼缘板平面内的应变函数,其横截面的正应力按三次抛物线规律变化。其次,运用变分原理导出微分方程,从而得到曲线箱梁桥剪滞效应的计算公式。在此基础上,编制了考虑曲率中心角和宽跨比两个重要因素的剪滞系数图表,可供实际应用。本文的理论公式是直、曲箱梁桥的普遍公式。

The author has worked out a mathe-matteal model for burden profile in charge distribution on PW top of the blast furnace. The model and its application are introduced in the article. Compared with the measured values of the burden profile on blast furnace No. 2 in Xiangtan Iron and Steel Company,the values of the Peripheral angle and central angle of burden profile calculated in our mathematical model are in agreement with the actal measured values. Our developed model is of more practical use.

作者研究出PW炉顶布料料面数模及其应用范围。与湘钢2#高炉实测料面值比较,用本数模计算出的料面边缘角和中心角与实测值基本一致。表明它具有较高的应用价值。

 
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