具有随机参数的盾构管片弹性密封垫防水性能优化分析

发布时间：2018-01-11 04:05

本文关键词：具有随机参数的盾构管片弹性密封垫防水性能优化分析　出处：《应用数学和力学》2017年08期 　论文类型：期刊论文

【摘要】：盾构管片接缝弹性密封垫断面的几何尺寸极易受生产工艺的影响而呈现出随机性,从而对盾构管片弹性密封垫的防水性能产生影响.该文选取密封垫的孔洞圆心坐标、孔径、断面宽度、断面高度等参数作为随机输入变量,运用ANSYS-PDS模块得出了各随机参数对密封垫防水性能的灵敏度数值,结果显示圆孔孔径对闭合压力及接触应力的影响较其他几何尺寸更大;圆孔垂向位置改变对闭合压力及接触应力的影响较横向位置更大.在此基础上,应用ANSYS优化设计模块,选取密封垫闭合压力和下表面平均接触应力作为状态变量,以在闭合压力不超过某一定值的条件下接触应力最大为目标函数,对密封垫进行几何参数优化分析,得出了某盾构隧道弹性密封垫优化断面,试验结果很好地验证了优化计算结果的可靠性.
[Abstract]:The geometric size of shield segment joint elastic gasket section easily affected by the production process and presents the random influence to seal waterproof performance of shield segment elastic. This paper selects hole center coordinates, seal aperture, section width, height of cross-section parameters such as the random input variables, using the ANSYS-PDS module that the numerical value of each random parameter on the sensitivity of seal waterproof performance, the result shows that the influence of aperture on the closure pressure and contact stress than other dimensions greater; hole vertical position change influence on closed stress and contact stress of a larger lateral position. On this basis, the application of ANSYS optimization module. Selection of seal closure pressure and the lower surface of the average contact stress as the state variables, in the closed pressure does not exceed a certain value under the condition of maximum contact stress as the objective function Based on the optimization analysis of the geometric parameters of the gasket, the optimal section of the elastic gasket of a shield tunnel is obtained. The test results verify the reliability of the optimization results well.

【作者单位】：同济大学铁道与城市轨道交通研究院;
【分类号】：U455.43
【正文快照】： 引言盾构隧道是由成千上万个管片通过螺栓联结而成的,管片接缝间的密封主要通过埋设其中的三元乙丙弹性橡胶密封垫压缩后防水.弹性密封垫的防水性能直接决定了盾构隧道的防水效果.为此,对橡胶密封垫的物理力学性能有严格的要求,断面结构型式的设计需要非常谨慎,力争获得较优的

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