Spiral-Groove gas seals work by maintaining a narrow clearance between the rotating and stationary rings. The finited element method is used to solve Renolds equation of the gas.
分析了螺旋槽气体密封间隙内的气体运动并建立了雷诺方程，将用有限元素法对该方程求解所得的结果与有关文献中的结论进行了比较；
Based on the stationary condition of energy functional, we set up the integral theorem along the boundary of arbitrary element and get the energy release quantity with the integral theorem.
根据裂纹扩展时能量泛函的驻值条件，建立了任意元素的围道积分定理。
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