Volume 30 Issue 12
Dec.  2015
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LI Hui, XUE Peng-cheng, XU Zhuo, SHEN Peng-fei, WEN Bang-chun. Identification of modal damping of composite cylindrical shell based on sliding-envelop method[J]. Journal of Aerospace Power, 2015, 30(12): 2833-2839. doi: 10.13224/j.cnki.jasp.2015.12.003
Citation: LI Hui, XUE Peng-cheng, XU Zhuo, SHEN Peng-fei, WEN Bang-chun. Identification of modal damping of composite cylindrical shell based on sliding-envelop method[J]. Journal of Aerospace Power, 2015, 30(12): 2833-2839. doi: 10.13224/j.cnki.jasp.2015.12.003

Identification of modal damping of composite cylindrical shell based on sliding-envelop method

doi: 10.13224/j.cnki.jasp.2015.12.003
  • Received Date: 2014-11-12
  • Publish Date: 2015-12-28
  • Due to the complexity of the damping mechanism of composite cylindrical shell, there is no practical and effective method to identify such structural damping.A modal damping test method based on sliding-envelop method was proposed.First, damping test principle and overall plan of sliding-envelop method for modal damping of composite cylindrical shell were clarified in details.Then, its test procedures in the actual test of modal damping of composite cylindrical shell were summarized.At last, a composite cylindrical shell coated with constrained layer damping materials was used as a study object, and its modal damping were well identified and the relation between external excitation level and modal damping was discussed.Test results showed that the maximum variance obtained by the proposed method corresponding to the first five orders damping result was less than 0.02%, and the damping results had good repeatability, thus ensuring high testing precision.

     

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