出自一篇外文学术会议
题目:Modal identification of solar array using vibro acoustic test data
摘要:The IMENE method provides a modal identification tool where only the structural responses but not the excitation need to be measured to identify the vibration modes and to estimate the damping of a dynamic system. The excitation might be of any nature, e.g. flow-induced or resulting from wind loads or vibro-acoustic noise. The IMENE method is based on a time domain parametric model Successful industrial applications have been particularly in the power industry to identify the modal characteristics of power plant components. Using vibro-acoustic test data to perform a modal identification of large surface structures as e.g. solar arrays or antenna reflectors can significantly reduce testing effort and costs. A pilot study has been carried out to investigate the applicability of the IMENE method to modal identification using such vibro-acoustic test data and, if necessary, to adapt the IMENE to even more efficiently perform this task. In the paper the results of the pilot study will be presented, shortcomings of the vibro-acoustic test data provided for this activity will be identified and recommendations given how this data should be prepared in future to allow for an adequate and efficient modal identification with IMENE.