基于各向同性本构关系薄层单元的螺栓连接参数识别

姜东; 吴邵庆; 史勤丰; 费庆国;

振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 35-40.

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 35-40.
论文

基于各向同性本构关系薄层单元的螺栓连接参数识别

  • 姜东1, 2 吴邵庆1, 2 史勤丰1, 2 费庆国1, 2
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Parameter identification of bolted-joint using thin-layer element with isotropic constitutive relationship

  • Jiang Dong1, 2, Wu Shaoqing1, 2, Shi qinfeng1, 2, Fei Qingguo1, 2
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摘要

针对工程中大量存在的螺栓连接建模与参数识别问题开展研究。基于各向同性本构关系薄层单元理论,提出了一种螺栓连接结构接触面力学性能识别方法。对单个螺栓搭接和多个螺栓搭接两种结构分别进行有限元建模,忽略螺栓质量和螺孔的影响,搭接界面采用各向同性本构关系的薄层单元模拟。根据试验模态参数构造优化问题,识别搭接界面薄层单元材料参数。识别后,两种螺栓连接结构前四阶弯曲模态频率的计算精度较高,表明识别后的薄层单元能准确反映接触界面力学性能,本文的方法适用于单个螺栓和螺栓较密集工况的动力学精确模拟。

Abstract

Study on finite element modeling and parameter identification of bolted joints which are widely applied in engineering is conducted in this paper. By adopting the basic theory of the thin-layer element with isotropic constitutive relationship, a method based on parameter identification for recognizing the mechanical characteristics of contact surface in bolted structures is proposed. Finite element modeling for single and multiple bolted structures are investigated respectively, ignoring the hole and the mass of the bolt, and the contact surface is modeled by using of thin-layer element. An optimization problem is formulated using experimental modal data for identifying the constitutive parameters of thin-layer element. When the identify parameters are adopted in the finite element model, the maximum error of the computational modal frequencies compared with the experimental data is reduced reasonably. It is shown that thin layer element with the identified parameters can be used for accurately simulating the normal and tangential stiffness of the contact surface. The proposed approach in this paper is available for precisely simulating the single and multiple bolted structures.


关键词

螺栓连接 / 各向同性 / 薄层单元 / 参数识别

Key words

Bolted-joint connection / Isotropic / Thin-layer element / Parameter identification

引用本文

导出引用
姜东; 吴邵庆; 史勤丰; 费庆国;. 基于各向同性本构关系薄层单元的螺栓连接参数识别[J]. 振动与冲击, 2014, 33(22): 35-40
Jiang Dong;;Wu Shaoqing;;Shi qinfeng;;Fei Qingguo;. Parameter identification of bolted-joint using thin-layer element with isotropic constitutive relationship[J]. Journal of Vibration and Shock, 2014, 33(22): 35-40

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