RESEARCH ON DYNAMICS OF A RIGID-FLEXIBLE-THERMAL COUPLING ROTATING HUB-FGM BEAM 1)
Fan Jihua,*,2), Chen Liwei*, Wang Mingqiang*, Zhang Dingguo?, Du Chaofan*** School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, China ** College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China
Abstract The rigid-flexible-thermal coupling dynamics of the hub-FGM beam system under large overall rotating motion is studied. The FGM beam is an Euler-Bernoulli beam, and its physical properties follow certain kinds of power law gradient distribution and vary in the thickness direction. The longitudinal deformation and the transverse deformation of the flexible beam are considered and the coupling term of the deformation which is caused by transverse deformation of the flexible beam is included in the expression of longitudinal deformation. Considering the influence of the thermal coupling of the tapered hollow beam which is under the condition of external high temperature and internal cooling passage cooling on the dynamic characteristics of the system, the temperature field distributed along the thickness direction of the FGM beam is obtained, and the thermal strain is included in the constitutive relationship of the beam. By using the assumed mode method to describe the deformation of the beam, the rigid-flexible-thermal coupling dynamic equations of the system are derived via employing Lagrange's equations of the second kind, as well as to compile the dynamics simulation software. Then the dynamics of the system are studied through simulation examples. The results show that the dynamic response of beams with different sections is quite different, so it is necessary to model the actual system reasonably. When the large overall rotating motion is known, the FGM beam considering the thermal shock load will effectively suppress the transverse bending deformation, and the high-frequency oscillation will occur with the superposition of the thermal shock when the large overall rotating motion is constant; When the large overall rotating motion is unknown, the external torque and the thermal shock load interact to produce a thermal coupling effect, which causes the system to exhibit high-frequency oscillation, at the same time , the rigid-flexible thermal coupling effect of the hub-FGM beam system is appeared. Keywords:functionally graded material;tapered hollow beam;rigid-flexible-thermal coupling;dynamic simulation
PDF (639KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 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 1). 力学学报[J], 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 1). Chinese Journal of Theoretical and Applied Mechanics[J], 2019, 51(6): 1905-1917 DOI:10.6052/0459-1879-19-241
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