Optimization of natural frequency for hexachiral structure based on response surface method

Luyun Chen, Hong Yi
2020 Journal of Vibroengineering  
To improve the resistance to vibration and reduce its structure mass, the structural dynamic properties of hexachiral structure with negative Poisson's ratio (NPR) are investigated. The optimization function of natural frequencies parameters is established, in which the thickness of circular nodes wall and ligaments of the hexachiral structure are defined as design variable. By normalizing the weight coefficients corresponding to the natural frequencies of different orders, the multi-objective
more » ... ptimization problem is converted into a single objective structural optimization problem. Finally, the cell of hexachiral structure for example, by introducing the response surfaces method, the structural optimization is carried out. The numerical analysis shows that the natural frequency is greatly increased, and the vibration resistance is strengthened. The results provide technical support for the design and application of high performance materials.
doi:10.21595/jve.2020.21350 fatcat:uvl6ybkwp5fhhpc5kpl7bmu7o4