ANALYSIS AND RISK ASSESSMENT OF LNG PLANTS AND OF INNOVATIVE METAMATERIAL-BASED SHIELDS UNDER SEISMIC LOADING

Abstract eng:
The paper will show the application of risk-based methodology for assessing critical components of a typical LNG plant. Therefore, we will consider the LNG plant components subjected to a systematic list of top events and accident conditions caused by hazards on tank components leading to a loss of containment or physical damage owing to seismic loading. Thus, performance levels and critical scenarios for seismic events will be quantified. The novel concept of periodic metamaterials or metastructures will be applied to the vibration mitigation of tanks of a petrochemical plant subjected to both seismic shear and/or Rayleigh waves. In greater detail and with regard to vibrations due to the impulsive components of the contained fluid, new tanks will be conceived with novel periodic smart foundations endowed with resonators; whilst existing tanks will be equipped with periodic resonators. Moreover, tanks can also be treated as resonating systems by themselves. These novel design concepts will also be explored for other examples of important symmetric structures, like the tanks used in regasification stations.

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