第五部門：応用数理問題―計算機科学から社会科学まで

[24007-12-06] Estimation bulging frequency of the real scale tank by micro-tremor measurement and calculation of natural frequency (Proceedings of Symposium on Applied Mechanics)

*Shu HIRAI¹, Taisuke ONO², Hirokazu HIRANO¹, Naotsugu SATO¹ (1. Chuo University, 2. NYK Co.Ltd.)

Keywords:Bulging, Micro-tremor measurement, Calculation of natural frequency, SUS panel tank

Bulging is a coupled vibration interacted the wall structure and fluid by short-period seismic motion, which causes the damages of water tanks during an earthquake. In this paper, we carried out micro-tremor measurement and calculation of natural frequency for the SUS panel tank and estimated the natural frequency. As a result, the effectiveness of the micro-tremor measurement method has been proven. In addition, it is found that there is a risk of bulging occurring in this tank.