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Natural frequency shift
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This article presents an improved procedure for detecting single damage in beam-like structures. Many damage detection methods are based on the analysis of beam natural frequency shifts in damaged and intact states and its analytical modal curvatures. They identify the damage by constructing curves of damage coefficients along the beam and visually determining the point of their mutual intersection.
15p
viberkshire
09-08-2023
4
3
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The results indicated the reduction of relaxation frequency with increasing the silica content due to the intensified interaction between nanoparticles and tryglycine sulfate inclusion. The nature of this interaction was thoroughly discussed in this study.
8p
tunelove
12-06-2021
8
1
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Our study includes the optimization of the geometries, the calculation of the binding energies and relevant vibrational frequencies along with a natural bond orbital analysis including the charges on the different atoms, the occupation of selected antibonding orbitals and the hyperconjugation energies.
8p
tamynhan8
04-11-2020
12
1
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In this communication, we report the synthesis of chitosan (CS, a biodegradable and biocom- patible natural polymer) [1] nanoparticles as drug carriers by ionic gelation. The method is based on ionic interactions between positively charged groups NH3 + of CS (in dilute CH3COOH solution) and negatively charged of sodium tripolyphos- phate, TPP).
2p
uocvong04
24-09-2015
83
3
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