TY - EJOU AU - Giridhara, G. AU - Gopalakrishnan, S. TI - Frequency Domain based Damage Index for Structural Health Monitoring T2 - Structural Durability \& Health Monitoring PY - 2009 VL - 5 IS - 1 SN - 1930-2991 AB - In this paper, a new damage measure in the frequency domain (FDI), which uses the definition of strain energy in the frequency domain, is proposed. The proposed damage index is derived using the definition of frequency domain strain energy. The base line responses and the strain energies are computed using Wavelet Spectral Finite elements, while the strain energies for the damaged structure is computed using four high fidelity experimental responses. The sensitivity of the damage measure in locating cracks of different sizes and orientation is demonstrated on a square plate, the rectangular plate and on a compressor blade. KW - Structural Health Monitoring KW - Wavelet Spectral Finite Element KW - Damage Index KW - Frequency Domain Strain Energy DO - 10.3970/sdhm.2009.005.001