Scholarlink

<p>In response to the demand for low-frequency micro-vibrations attenuation and suppression of high-precision spacecraft equipment, a curved negative Poisson’s ratio isolator (CNPRI) is designed, incorporating the geometric nonlinearity and negative Poisson’s ratio effect of the curved structure, along with the viscoelastic damping properties of silicon rubber material. Initially, the negative Poisson’s ratio effect of the structure is analyzed based on Euler-Bernoulli beam theory, and its theoretical derivation is validated using finite element method (FEM). Subsequently, modal analysis and frequency response analysis are employed for CNPRI to investigate the influence of inherent frequency and strain energy on vibration deformation and acceleration amplitude response characteristics. The impact of the isolator’s inner concave angle on the damping properties and vibration suppression effect is thereby delineated. Finally, an experimental platform for vibration isolation test is constructed, where sweep frequency and fixed frequency vibration tests are conducted to compare the designed isolator’s effectiveness with that of traditional rubber bearing. The results show that the vibration isolation rate of the CNPRS isolator first increases and then stabilizes as the inner concave angle increases (with vibration isolation rates of 82.1% at 20°, 89.7% at 25°, and 93.49% at 30°). Moreover, the vibration isolation effect under all angles is better than that of traditional rubber pads (vibration isolation rate ≤ 65%).</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

Investigation on a Novel Arc-Shaped Negative Poisson Ratio Structure Based on 3D Printing for Nonlinear Low-Frequency Micro-Vibration Suppression

  • 期刊论文

  • 发表日期：

    2026年2月6日

查看全文
  • Musen Liu,
  • Xiaoyu Sui,
  • Kai Guo,
  • Jie Sun,
  • Vinothkumar Sivalingam

摘要

In response to the demand for low-frequency micro-vibrations attenuation and suppression of high-precision spacecraft equipment, a curved negative Poisson’s ratio isolator (CNPRI) is designed, incorporating the geometric nonlinearity and negative Poisson’s ratio effect of the curved structure, along with the viscoelastic damping properties of silicon rubber material. Initially, the negative Poisson’s ratio effect of the structure is analyzed based on Euler-Bernoulli beam theory, and its theoretical derivation is validated using finite element method (FEM). Subsequently, modal analysis and frequency response analysis are employed for CNPRI to investigate the influence of inherent frequency and strain energy on vibration deformation and acceleration amplitude response characteristics. The impact of the isolator’s inner concave angle on the damping properties and vibration suppression effect is thereby delineated. Finally, an experimental platform for vibration isolation test is constructed, where sweep frequency and fixed frequency vibration tests are conducted to compare the designed isolator’s effectiveness with that of traditional rubber bearing. The results show that the vibration isolation rate of the CNPRS isolator first increases and then stabilizes as the inner concave angle increases (with vibration isolation rates of 82.1% at 20°, 89.7% at 25°, and 93.49% at 30°). Moreover, the vibration isolation effect under all angles is better than that of traditional rubber pads (vibration isolation rate ≤ 65%).