基于VB的阶梯搅拌轴临界转速算法实现

针对阶梯搅拌轴的临界转速计算问题，提出了一种计算方法。该算法先将带叶轮的阶梯搅拌轴去除其叶轮及阶梯部分，运用传统算法计算出了简化后的临界转速；再计算所去除的叶轮及阶梯部分临界转速，该部分通过综合运用经典算法及积分法进行计算并得出了其临界转速；最后，利用邓柯莱累加法得出了原搅拌轴的临界转速。利用VB编程软件对算法进行了编程，以几种常用搅拌轴为例，对其一阶临界转速进行了计算。利用ANSYS软件对算例结果进行了计算对比。研究结果表明，该算法准确可靠，简单方便。

Critical speed algorithm of multi-diameter agitating shaft based on VB

In order to calculate critical speed of muhi-diameter agitating shaft with impellers ,a critical speed algorithm was proposed. Multi- diameter agitating shaft with impellers was simplified as the shaft without any impeller and multi-diameter parts. The critical speed value of this part can be calculated by the traditional algorithm. Then, critical speed value of the deducted components was calculated by classieal al- gorithm and integral method. Eventually, the critical speed of original agitating sh＇aft was obtained by dunkerley formula. The algorithm was programmed by VB software, the first order critical speed value of several contmonly used agitating shafts was calculated. The results were compared through ANSYS software. The resuhs imticate that the algorithm is simple,convenient and correct.