Predicting Structure Dynamic Acceleration Based on Measured Strain
For complex structures, to understand its dynamical characteristics, it is desired that the dynamical responses under excitation, e.g. displacement or acceleration, could be measured directly. But at present, the measuring method for acceleration is still limited and constrained by many factors. Especially for complex structures, the direct measurement for acceleration is quite difficult. In contrast, strain measurement is relatively easy, since the strain sensor is simple and can be easily pasted on the surface of structure. Thus if the measured strain data can be used to predict the dynamical response of system, it will result in great benefit. In this paper, a method is proposed to predict the acceleration from the measured strain response, which needs only a few strain sensors. The validation experiments were carried out on a cantilever beam and a rectangle cylinder. The stochastic motion was chosen as the excitation source. The results prove that the presented method is effective and could reach a high precision.
KeywordsStrain mode Displacement mode Prediction Stochastic excitation
The support of National Natural Foundation of China (Grant No. 11672237) is gratefully acknowledged.
- 8.Iadicicco, A., Pietra, M.D., Gaudio, G., Campopiano, S.: Strain measurements of a multilayer panel via Fiber Bragg gratings as novel approach for deflection monitoring of tracking particle detectors. In: Proceedings of SPIE, 9506, Optical Sensors 95061L (2015)Google Scholar
- 10.Hong, W., Qin, Z., Lv, K., Fang, K.: An indirect method for monitoring dynamic deflection of beam-like structures based on strain responses. Appl. Sci. 8(811), 1–16 (2018)Google Scholar