Experimental Research on Damage Recognition of T-shaped Beam on an Areospacecraft

Jiazhao Chen; Xueren Wang; Tongtong Huo; Peng Qi

doi:10.54097/bc6yqk34

Authors

Jiazhao Chen Rocket Force University of Engineering, 2# Tongxin Road, Baqiao District, Xi’an, Shaanxi, 710025, China
Xueren Wang Rocket Force University of Engineering, 2# Tongxin Road, Baqiao District, Xi’an, Shaanxi, 710025, China
Tongtong Huo Science and Technology Bureau of Jimo District, Huo Tongtong, Jimo District, Qingdao City, Shandong Province, China
Peng Qi Rocket Army Representative Office, Xi’an, Shaanxi, 710025, China

DOI:

https://doi.org/10.54097/bc6yqk34

Keywords:

T-shaped beam; damage recognition; experiment; location; quantification.

Abstract

The paper pre-set some damages in different level in the T-shaped beam test specimen by wire cutting, and obtained modal data of the damaged T-shaped beam by experiment. It adopted two methods, i.e. element modal strain energy change rate and element modal strain energy basis, to recognize damage locationally, and it adopted two methods, i.e. sensitivity matrix and second order generalized flexibility matrix, to recognize damage quantificationally. The result showed that the element modal strain energy basis had better locational recognition result while the second order generalized flexibility matrix had better quantitative recognition result. Therefore, using a combination of the two methods will get good recognition result, i.e., firstly using the element modal strain energy basis to recognize damage locationally, and then using the second order generalized flexibility matrix to recognize damage quantificationally.

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