ABSTRACT
All real physical structures behave dynamically when subjected to loads or displacements. This research paper, therefore,
presents seismic response of field fabricated liquefied natural gas spherical storage vessels using finite element
analysis. The seismic analysis procedure used represents a practical approach in quantifying the response of spherical
storage vessel with its content when it is subjected to seismic loading. In the finite element method approach, six degrees
of freedom per node is used for legs/column of the spherical storage tanks. Lumped mass procedure is employed
to determine system mass matrix of the structure. Computer programme code is developed for the resulting matrix
equation form finite element analysis of the structure using FORTRAN 90 programming language. The modeling of the
seismic load utilizes the ground acceleration curve of a site. From the results of the modal analysis, the system is uncoupled
thereby gives way to the application of Newmark’s method. Newmark’s method as one of the widely used
time-step approach for the seismic response is applied. The developed programme coding is validated with analytical
results (P > 0.5). It shows that the approach in this research work can be successfully used in determine the stability of
large spherical storage vessels against seismic loadings when base acceleration spectral of the site are known. This approach
gives better results than the static-force approach which gives conservative results. While the approach used in
this research treats seismic loads as time event, static-force approach assumed that the full ground force due to seismic
motion is applied instantaneously
Adeyefa, O (2021). Finite Element Modeling of Seismic Response of Field Fabricated Liquefied Natural Gas (LNG) Spherical Storage Vessels. Afribary. Retrieved from https://afribary.com/works/finite-element-modeling-of-seismic-response-of-field-fabricated-liquefied-natural-gas-lng-spherical-storage-vessels
Adeyefa, Oludele "Finite Element Modeling of Seismic Response of Field Fabricated Liquefied Natural Gas (LNG) Spherical Storage Vessels" Afribary. Afribary, 21 Apr. 2021, https://afribary.com/works/finite-element-modeling-of-seismic-response-of-field-fabricated-liquefied-natural-gas-lng-spherical-storage-vessels. Accessed 26 Dec. 2024.
Adeyefa, Oludele . "Finite Element Modeling of Seismic Response of Field Fabricated Liquefied Natural Gas (LNG) Spherical Storage Vessels". Afribary, Afribary, 21 Apr. 2021. Web. 26 Dec. 2024. < https://afribary.com/works/finite-element-modeling-of-seismic-response-of-field-fabricated-liquefied-natural-gas-lng-spherical-storage-vessels >.
Adeyefa, Oludele . "Finite Element Modeling of Seismic Response of Field Fabricated Liquefied Natural Gas (LNG) Spherical Storage Vessels" Afribary (2021). Accessed December 26, 2024. https://afribary.com/works/finite-element-modeling-of-seismic-response-of-field-fabricated-liquefied-natural-gas-lng-spherical-storage-vessels