单螺栓连接梁的非线性连接层建模与参数识别

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (1) : 190-197.

论文

刘鹏韬，关天赐，王小鹏

作者信息 +

Nonlinear connection layer modeling and parametric identification for single bolt connected beam

LIU Pengtao, GUAN Tianci, WANG Xiaopeng

Author information +

文章历史 +

摘要

针对线性的螺栓连接层等效模型无法表征进入微观滑移状态后结合部动力学行为的问题，用Voce本构关系对线性连接层等效模型做出了改进，使其能表征螺栓结合部的非线性动力学行为。以单螺栓连接梁为研究对象，实验探究了不同预紧扭矩对其固有频率的影响，测试了其在不同幅值谐波激励力下的频响函数。通过遗传算法对连接层等效模型的四个非线性参数进行了识别，分别包括初始屈服应力、切线模量和两个形状参数，识别了参数后模型频响函数计算值与实验值的误差在10%以内，表明改进后模型的准确性与可行性。改进后连接层等效模型可以用于装配结构非线性行为的预测。
关键词：螺栓连接；参数识别；非线性；连接层模型

Abstract

Aiming at the problem that the linear equivalent model of bolted joint layer can not characterize the dynamic behavior of the joint after entering the micro slip state, the linear equivalent model of bolted joint layer is improved by using Voce constitutive relationship to characterize the nonlinear dynamic behavior of bolted joint. Taking the single bolt connection beam as the research object, the influence of different pre tightening torques on its natural frequency was investigated experimentally, and the frequency response function under different amplitude harmonic excitation force was tested. The four nonlinear parameters of the equivalent model of the connection layer were identified by genetic algorithm，including initial yield stress, tangent modulus and two shape parameters. After identifying the parameters, the error between the calculated value of the model frequency response function and the experimental value is less than 10%, which shows the accuracy and feasibility of the improved model. The improved equivalent model of connecting layer can be used to predict the nonlinear behavior of assembly structure.
Key words: bolted joint; parameter identification; nonlinear; connective layer model

导出引用

刘鹏韬，关天赐，王小鹏. 单螺栓连接梁的非线性连接层建模与参数识别[J]. 振动与冲击, 2023, 42(1): 190-197

LIU Pengtao, GUAN Tianci, WANG Xiaopeng. Nonlinear connection layer modeling and parametric identification for single bolt connected beam[J]. Journal of Vibration and Shock, 2023, 42(1): 190-197

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