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为了有效降低孔边应力水平,以某型航空发动机封严篦齿盘5参量单轴对称异型孔为研究对象。针对此类异型孔的公差设计问题,利用蒙特卡洛模拟技术,通过构造异型孔孔边应力状态的响应面函数以对设计参数进行灵敏度分析,确定了需要给定公差的设计变量。讨论了异型孔的重要设计尺寸公差带对孔边应力分布及配合的影响,并参照美制紧固件螺栓通孔设计标准,确定了此类异型孔尺寸公差选取应满足的强度要求及装配等级。
In order to reduce the stress level at the edge of the hole, a parametric uniaxial symmetrical hole of a certain aero-engine sealed gaggle disk was taken as the research object. In order to solve the design problem of tolerance for such shaped holes, Monte Carlo simulation technique was used to analyze the sensitivity of design parameters by constructing the response surface function of the stress state of abnormal holes, and the design variables that required given tolerances were determined. The influence of important design dimension tolerance band of profile hole on hole edge stress distribution and its cooperation is discussed. With reference to the design standard of bolt hole of American fastener, the strength requirement and assembly grade which should be satisfied by selecting the dimension hole tolerance of profile hole are determined.