基于有限元的螺栓连接参数化建模技术研究

推进技术 ›› 2016, Vol. 37 ›› Issue (7): 1364-1371.

基于有限元的螺栓连接参数化建模技术研究

翟学¹,翟庆刚²,王建军¹,姚星宇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,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，男，博士生，研究领域为整机动力学建模与仿真。

Parameterized Modeling Technology of Bolted Joints

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

Published:2021-08-15

摘要/Abstract

摘要： 为有效解决机械结构中众多螺栓连接力学特性的模拟问题，研究了基于有限元的螺栓连接不同刚度特性的参数化建模方法，形成了具有一定指导意义的参数化建模理论。基于两个典型实例研究，螺栓连接的参数化有限元模型固有频率计算值与试验值误差很小，都在5%以内，充分验证了螺栓连接参数化建模理论和建模方法的准确性和有效性。成功应用于现代高推重比涡扇发动机系统中，计算结果表明，参数化模型计算值与目标值的固有频率误差均在1%以内，且两种模型振型基本一致，模态置信度准则(MAC)值均接近于1，有效模拟了转、静子中关键螺栓连接结构的力学特性。

关键词: 有限元方法；螺栓连接；参数化建模；涡扇发动机；模态试验

Abstract: To effectively solve the simulation problem of bolted joint mechanics characteristics in engineering structure，the parameterized modeling method (PMM) of stiffness characteristic for bolted joints based on finite element (FE) has been researched，and a certain guiding significance theory of parameterized modeling (PMT) has been formed. Firstly，in light of two typical examples，the error of natural frequency results between parameterized finite element model (PFEM) of bolted joints and experimental test is small，which is all within 5%. The accuracy and effectiveness of the developed PMT and PMM are validated lightly. Then，the developed PMT and PMM have been successfully applied to a certain type of modern high ratio turbofan engine system. The calculated results indicate that the natural frequency errors between PFEM calculated values and experimental test values are all within 1%，and the mode shapes are also much similar，the values of MAC (modal assurance criterion) are all closed to 1. The key bolted joint structures in rotor and stator are established equivalently.

Key words: Finite element method；Bolted joints；Parameterized modeling method；Turbofan engine；Modal test

翟学,翟庆刚,王建军,姚星宇. 基于有限元的螺栓连接参数化建模技术研究[J]. 推进技术, 2016, 37(7): 1364-1371.

ZHAI Xue¹,ZHAI Qing-gang²,WANG Jian-jun¹,YAO Xing-yu¹. Parameterized Modeling Technology of Bolted Joints[J]. Journal of Propulsion Technology, 2016, 37(7): 1364-1371.

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