Application of CCFS Design Analysis Method for Multiple Excitation Problem

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  • 多入力応答スペクトル解析法(CCFS法)の原子力配管系耐震設計への適用性について

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This paper provides the seismic design analysis method of the multiply supported systems, as the one of the design methodology adopted in the equipment and piping system of the nuclear power plant. Through the numerical study focused on the typical piping system, seismic responses by applying the CCFS (Cross-oscillator, Cross-Floor response Spectrum) method or ISM (Independent Support Motion) method with SRSS or Absolute Sum combination have compared to the exact solution of modal time history analysis method considering multiple excitation condition. As the results, CCFS analysis method is found to be quite effective for a seismic design of multiply supported piping systems.

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