지진 및 모델 불확실성 하에서 TMD 설계 방법의 배관계통 응답 저감 효과 연구

초록

This study analyzed the effect of tuned mass damper (TMD) design methods on reducing seismic responses in piping. Specifically, a numerical piping model was established and validated using shaking table tests conducted on actual piping in a nuclear power plant (NPP). The optimal TMD installation location was determined using the validated piping model, and several methods were employed to derive the TMD design values. In addition, the study adopted the geometric mean of the existing design method as the TMD design value. Ultimately, the performance of the TMD, designed for the existing piping, was validated considering the randomness of earthquakes and the uncertainties associated with earthquakes and target materials. The operability of the TMD designed according to the geometric mean model was also verified. Consequently, a comparison of performance differences across various TMD design methods showed that the geometric mean model encompassed the characteristics of the existing design method. This proposed model is expected to be useful as an initial value in future repetitive numerical analyses. Furthermore, these analytical results are anticipated to provide valuable data for improving the seismic performance of TMD designs in NPP piping systems.

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