...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Mathematical Modelling >Dynamics of polymer and polymer composite rotors - An operator based finite element approach
【24h】

Dynamics of polymer and polymer composite rotors - An operator based finite element approach

机译：聚合物和聚合物复合材料转子的动力学-基于算子的有限元方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a differential time operator based approach to obtain equations of motion of a generally viscoelastic rotor-shaft after discretizing the shaft continuum with finite beam elements. The equations of motion are utilized to study dynamic behaviour of a generic viscoelastic composite rotor-shaft comprising of viscoelastic reinforcing fibres in a viscoelastic matrix. Anelastic Displacement Field model (ADF), a time-domain material model, is used to represent the viscoelastic constitutive relationships. The model parameters are extracted by a Genetic Algorithm based optimisation procedure from frequency-dependent values of storage and loss modulii. For an example the composite rotor is assumed to be made by reinforcing unidirectional long graphite fibres in a PVC (Poly-Vinyl-Chloride) matrix. The equations of motion are used for numerical simulation as well as comparison of stability limit of spin speed and unbalance response amplitude at the disc of two rotor-shaft systems, one made of pure PVC and the other made by reinforcing graphite fibres in the PVC matrix. It is concluded that reinforcement of long fibre, enhances the stability limit of spin speed as well as the first natural frequency in comparison with those of rotor-shaft made of pure PVC.
机译：本文提出了一种基于微分时间算子的方法，该方法在用有限梁单元离散化轴连续体后，获得一般粘弹性转子轴的运动方程。运动方程用于研究由粘弹性基质中的粘弹性增强纤维组成的普通粘弹性复合转子轴的动力学行为。非弹性位移场模型（ADF）是时域材料模型，用于表示粘弹性本构关系。通过基于遗传算法的优化程序从与频率相关的存储和损耗模量值中提取模型参数。例如，假定复合转子是通过在PVC（聚氯乙烯）基质中增强单向长石墨纤维制成的。运动方程式用于数值模拟，以及在两个转子轴系统的盘片上比较旋转速度的稳定极限和不平衡响应幅度，一个转子轴系统是由纯PVC制成，而另一个是通过在PVC基体中增强石墨纤维制成的。 。结论是，与纯PVC制成的转子轴相比，长纤维的增强提高了旋转速度的稳定性极限以及第一自然频率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号