Comprehensive reinforcement technique of bridge approach bump disease in the construction of transition section 過渡段施工橋頭跳車病害的綜合加固施工技術(shù)
The conveyor belt is turned from flat belt into tubular one at transition section , with the result that great additional deformation and stress in both side of belt , decrease in the belt safety factor 摘要在圓管帶式輸送機過渡段,輸送帶由平形變成圓管,其邊緣會產(chǎn)生較大的附加變形,產(chǎn)生附加應(yīng)力,使輸送帶安全系數(shù)下降。
By means of geometric analysis of belt deformation in transition section , the paper introduces how to calculate the length in transition section , with considering extension ratio of belt and the difference between head a and tail of extension section 本文通過對過渡段輸送帶變形的幾何分析,綜合考慮輸送帶伸長率以及頭尾過渡段區(qū)別,給出圓管帶式輸送機過渡段長度的理論計算方法。
2 . to design an axial magnetic field . the cathode lies in 0 . 4 - 0 . 7 of peak value of the magnetic field and excursion channel in a uniform magnetic field to suppress space charge effects ; to design transition section between the gun and excursion channel in converse computation . 3 選擇電子槍陰極處于軸向聚焦磁場峰值的0 . 4 - 0 . 7倍處;漂移通道(互作用區(qū))位于均勻軸向聚焦磁場中,以抑制電子束的空間電荷效應(yīng);使用反算法設(shè)計電子槍和漂移通道之間的過渡區(qū)。
The results indicate that the flow velocity is lower and the pressure is high in majority of the step cylinder , the distinct variations of the flow field occur in the threshold of the step cylinder at the bottom and the abrupt transition sections , the holes in the inner and outer tubes and the exhaust hole 結(jié)果表明:步進(jìn)缸內(nèi)大部分區(qū)域流體流速較小,壓力較高,且變化不大,發(fā)生明顯變化的部位主要分布在步進(jìn)缸底部水管入口及截面突變處、內(nèi)外套對孔處和排氣孔處。