记录其断裂时最大扭距(Mnmax)和变形角(φmax)。按White等［8］公式计算其抗扭刚度(GIP),公式为:GIP=Mnmax/φmax。
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The geometric dimensions and balance parameters of the beam pumping units are optimized. As a result, Me is re- duced 31.2% and Mnmax is reduced 35.3% than phased balance.
文章对其几何尺寸与平衡参数进行了优化设计，证实该机型曲柄轴的均方根扭矩比异相型减少了31.2％，最大扭矩减少了35.3％，平衡效果显著。
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