Scholarlink

<p>Nonlinear modeling of bolted joints is a highly challenging scientific task in structural dynamics. Considering the contact nonlinearity of joint interfaces, this study presents an analytical nonlinear vibration model for flange-bolted lap joints. Firstly, through co-simulations of finite element (FE) software Hyperworks and ANSYS, the detailed FE model of the flange is constructed, and the elastostatic properties are investigated numerically, indicating that the bending stiffness exhibits significant nonlinearity under positive and negative moments. Meanwhile, further studies indicate that the nonlinear bending stiffness is caused by interfacial contact nonlinearity. Subsequently, the nonlinear rotational springs with different bending stiffness are introduced to model the flexural behavior of the joint, and the nonlinear vibration model for the flange is further developed based on Euler–Bernoulli beam theory. The results indicate that the flange theoretically exhibits bi-linear flexural frequencies. Finally, the presented model is verified through impact experiments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nonlinear vibration modeling for flange-bolted lap joints

  • 期刊论文

  • 发表日期：

    2025年10月3日

查看全文
  • Wenbo Shi,
  • Shangzi Wu,
  • Tonghang Zhao,
  • Zhousuo Zhang

摘要

Nonlinear modeling of bolted joints is a highly challenging scientific task in structural dynamics. Considering the contact nonlinearity of joint interfaces, this study presents an analytical nonlinear vibration model for flange-bolted lap joints. Firstly, through co-simulations of finite element (FE) software Hyperworks and ANSYS, the detailed FE model of the flange is constructed, and the elastostatic properties are investigated numerically, indicating that the bending stiffness exhibits significant nonlinearity under positive and negative moments. Meanwhile, further studies indicate that the nonlinear bending stiffness is caused by interfacial contact nonlinearity. Subsequently, the nonlinear rotational springs with different bending stiffness are introduced to model the flexural behavior of the joint, and the nonlinear vibration model for the flange is further developed based on Euler–Bernoulli beam theory. The results indicate that the flange theoretically exhibits bi-linear flexural frequencies. Finally, the presented model is verified through impact experiments.