航空发动机静子系统中螺栓连接结构的建模与修正

推进技术 ›› 2015, Vol. 36 ›› Issue (3): 450-457.

航空发动机静子系统中螺栓连接结构的建模与修正

翟学¹,王建军¹,翟庆刚²,刘玉¹

北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,北京航空工程技术研究中心，北京 100076,北京航空航天大学能源与动力工程学院，北京 100191

发布日期:2021-08-15
作者简介:翟学(1987—)，男，博士生，研究领域为整机动力学建模与仿真。

关键词:有限元建模；模型修正；概率设计；蒙特卡洛；接触单元

School of Jet Propulsion，Beihang University，Beijing 100191，China,School of Jet Propulsion，Beihang University，Beijing 100191，China,Beijing Aeronautical Technology Research Center，Beijing 100076，China and School of Jet Propulsion，Beihang University，Beijing 100191，China

Published:2021-08-15

摘要/Abstract

摘要： 基于概率设计方法对航空发动机静子系统中螺栓连接结构进行模型修正研究。静子系统中不同的机匣结构由螺栓连接在一起，采用具有一定材料属性的层单元法来等效模拟螺栓连接结构，通过调节层单元材料属性来提高有限元模型精度。首先采用灵敏度分析方法确定修正区域，然后基于概率方法设计修正参数，利用蒙特卡洛抽样法选取样本点，最后基于静力学试验数据选择合理的目标函数，通过迭代优化计算得到修正后的模型参数。结果表明，修正后的静子系统有限元模型计算得到的刚度值与试验数据更加接近，修正后的相对误差都在5%以内。

关键词: 有限元建模；模型修正；概率设计；蒙特卡洛；接触单元

Abstract: Model updating for bolted joints structure in the aero-engine stator system was carried out using a probabilistic design method. These casing components in the stator system were assembled together with differ ent kinds of bolted joints and modeled with a method of thin layer elements having a certain material properties，which may be adjusted to improve the prediction accuracy of the finite element model. For the typical structure of the aero-engine stator system，the sensitivity analysis was performed to select modified region. Then，the proba bilistic method was used to design updating parameters and through Monte Carlo method to select sampling points. An effective objective function was determined based on the static stiffness testing and finally the updated parameters could be obtained by optimization iteration computation. The results show that the casing stiffness cal culated from the updated model agrees better with the measured data，the relative errors were all within 5% after updating.

Key words: Finite element modeling；Model updating；Probabilistic design；Monte Carlo method；In?

翟学,王建军,翟庆刚,刘玉. 航空发动机静子系统中螺栓连接结构的建模与修正[J]. 推进技术, 2015, 36(3): 450-457.

ZHAI Xue¹,WANG Jian-jun¹,ZHAI Qing-gang²,LIU Yu¹. 关键词:有限元建模；模型修正；概率设计；蒙特卡洛；接触单元[J]. Journal of Propulsion Technology, 2015, 36(3): 450-457.

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