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旋转中心刚体-FGM梁刚柔热耦合动力学特性研究

范纪华 陈立威 王明强 章定国 杜超凡

范纪华, 陈立威, 王明强, 章定国, 杜超凡. 旋转中心刚体-FGM梁刚柔热耦合动力学特性研究[J]. 力学学报, 2019, 51(6): 1905-1917. doi: 10.6052/0459-1879-19-241
引用本文: 范纪华, 陈立威, 王明强, 章定国, 杜超凡. 旋转中心刚体-FGM梁刚柔热耦合动力学特性研究[J]. 力学学报, 2019, 51(6): 1905-1917. doi: 10.6052/0459-1879-19-241
Fan Jihua, Chen Liwei, Wang Mingqiang, Zhang Dingguo, Du Chaofan. RESEARCH ON DYNAMICS OF A RIGID-FLEXIBLE-THERMAL COUPLING ROTATING HUB-FGM BEAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1905-1917. doi: 10.6052/0459-1879-19-241
Citation: Fan Jihua, Chen Liwei, Wang Mingqiang, Zhang Dingguo, Du Chaofan. RESEARCH ON DYNAMICS OF A RIGID-FLEXIBLE-THERMAL COUPLING ROTATING HUB-FGM BEAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1905-1917. doi: 10.6052/0459-1879-19-241

旋转中心刚体-FGM梁刚柔热耦合动力学特性研究

doi: 10.6052/0459-1879-19-241
基金项目: 1) 国家自然科学基金(11502098);1) 国家自然科学基金(11772158);1) 国家自然科学基金(11802263);江苏省自然科学基金(BK20180895);江苏省高校自然科学研究面上项目(15KJB130003);江苏科技大学博士科研启动基金资助项目(120140003)
详细信息
    通讯作者:

    范纪华

  • 中图分类号: O313.7

RESEARCH ON DYNAMICS OF A RIGID-FLEXIBLE-THERMAL COUPLING ROTATING HUB-FGM BEAM

  • 摘要: 对旋转中心刚体-功能梯度材料(functionally graded material,FGM)梁刚柔热耦合动力学特性进行研究.FGM梁为物理性能参数沿厚度方向呈幂律分布的欧拉伯努利梁.考虑柔性梁的横向弯曲变形和轴向拉伸变形, 并计入横向弯曲变形引起的纵向缩短,即非线性耦合变形量.考虑变截面空心梁在外部高温、内冷通道冷却情况下的热力耦合对系统动力学特性的影响,求解得到FGM梁沿厚度方向分布的温度场, 进而在本构关系中计入热应变.采用假设模态法对柔性梁变形场进行离散,运用第二类拉格朗日方程推导得到系统的刚柔热耦合动力学方程,并编制动力学仿真软件, 然后通过仿真算例对系统的动力学问题进行研究.结果表明:不同截面梁动力学响应差异较大, 因此需对实际系统合理建模;大范围运动已知时, 考虑热冲击载荷的FGM梁将有效抑制横向弯曲变形,而大范围运动恒定时随热冲击的叠加会出现高频振荡; 大范围运动未知时,外力矩和热冲击载荷相互作用产生热力耦合效应, 导致系统呈现高频振荡,同时与中心刚体大范围旋转运动产生刚柔热耦合效应.

     

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  • 收稿日期:  2019-08-28
  • 刊出日期:  2019-11-18

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