Dynamic analysis and inertia load of ITER equatorial port plug EPP9 DSM2

Authors: H. Zhang, Y. Zhai, P. Titus

Abstract: The work presented in this paper mainly focuses on the response spectrum analysis of ITER diagnostic equatorial port plug structure assembly (PPs) to extract dynamic behavior of PPs and the in-port diagnostic systems due to transient vacuum vessel (VV) movements during Non-symmetric plasma vertical displacement events (VDEs) and during the seismic loading. A generic equatorial port plug Structural (GEPP) analysis model was provided by ITER Organization (IO), Based on the GEPP model, the US ITER equatorial port #9 Diagnostic Shielding Module (DSM) with in-port systems such as the Electron Cyclon Emission (ECE) was integrated in and the latest design of closure plate was used to replace the simple plate in the generic model too to ensure structural integrity. Two types of response spectrum analysis were performed The floor response spectra (FRS) analysis based on random vibration (PSD) is to provide the input spectra for the response spectrum analysis of next level components that will be mounted to the DSM or the closure plate The dynamic behavior of PPs and the in-port diagnostic systems due to vacuum vessel (VV) movements during plasma vertical displacement events (VDEs) and during the seismic loading is simulated with response spectrum analysis based on the deterministic method (Multi- Point Response Spectrum (MPRS)).

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