A calculation method of structural response considering dynamic characteristics of damping materials

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (24) : 56-62.

LIU Lan1,LIU Yunong1,2,LIU Chao1,LIU Geng1,WU Liyan1 YUE Yanjiong3

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Abstract

In order to accurately calculate the vibration response of an additional damping structure, a structural response calculation method which considers the dynamic characteristics of the damping materials was proposed, which can accurately extract the modal parameters and calculate the vibration responses of the additional damping structure.The material properties of damping materials are affected by the excitation frequency, which may cause the calculation of the vibration response inaccurate.Based on the traditional modal strain energy method, an improved modal strain energy method considering the dynamic characteristics of materials was established.The modal parameters of the composite structure were extracted accurately, which were verified by a modal test.Then the modal parameters were accurately substituted into the structural vibration response calculation.By comparing the acceleration frequency response curves of the observation points in simulation and experiment, the accuracy of the response calculation method was verified.The results show that the modal parameters of the additional damping structure can be accurately extracted and the vibration response of the structure can be calculated by this method.

Key words

additional damping structure / dynamic characteristics of damping materials / modal strain energy method / structural vibration response

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LIU Lan1,LIU Yunong1,2,LIU Chao1,LIU Geng1,WU Liyan1 YUE Yanjiong3. A calculation method of structural response considering dynamic characteristics of damping materials[J]. Journal of Vibration and Shock, 2019, 38(24): 56-62

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