knuckle joint是什么意思

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用法例句

In this paper, the pipe joint mechanical model and beam on elastic foundation method are put forward according to the characteristic of curve pipe jacking engineering, then they are used to calculate and analyze the jacking force, joint stretching value, pipe internal force, earth resistance and the stability of earth.

针对曲线顶管工程的特点 ,通过建立管节 -接头力学模型及弹性地基梁法 ,对顶管施工的顶力、管接头张开量、管段内力、土体抗力及土体的稳定性等进行了计算与分析 ,研究成果在大口径小半径曲线顶管施工实践中的成功应用 ,证明其对今后同类工程具有较好的指导意义和实用推广价