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高品質信号取得のためのACROSS稠密地震観測アレイ

A Dense Seismic Array for Acquisition of High Quality Data in ACROSS Observation

鶴我 佳代子; 國友 孝洋; 羽佐田 葉子; 熊澤 峰夫; 茂田 直孝; 笠原 順三

Tsuruga, Kayoko; Kunitomo, Takahiro; Hasada, Yoko; Kumazawa, Mineo; Shigeta, Naotaka; not registered

コヒーレントな波動を能動的に使うACROSSがもつ高い潜在力を最大限に活用するには、稠密地震観測アレイをルーチンで運用できるようにすることである。そこで本報告では、正方稠密面アレイの構築とその試験観測、および試験的データ解析の一例を紹介し、我々が目指すべき観測システムを提案する。

There is a problem of vibration in a diagnosis system of helical evaporator tubes installed in a nuclear power station. Numerical simulations are implemented on the assumption that the vibration is caused by the Coulomb's friction. An analytical model is derived as a large scale nonlinear vibration system and a lot of computational cost would be required to carry out the simulations. The Transfer Influence Coefficient Method, which has high accuracy and efficiency in numerical computations, is applied and efficiently implements the simulations. The vibrations are qualitatively reproduced by the simulations. It enables us to make a pre-evaluation of several means to suppress the vibrations are qualitatively reproduced by the simulations. It enables us to make a pre-evaluation of several means to suppreess the vibration and the most effective devise is expected through the simulation.

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