Monitoring of Structural Dynamic Characteristics of Socheongcho Ocean Research Station

Kim, Wonsul; Yi, Jin‐Hak; Min, In Ki; Shim, Jae-Seol

doi:10.2112/si85-239.1

Cited by 4 publications

(1 citation statement)

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“…. 이후 이들 과학기지에 동 적응답 계측시스템을 구축하였으며, 계측결과를 이용하여 환 경조건에 따른 동특성 변화 및 구조해석모델 개선 등을 수행 한 바 있다 (Kim et al, 2018;Kim et al, 2019;Yi et al, 2020). 한편 세굴 깊이와 관련한 기존 연구로는 해상풍력터 빈 기초부에 발생한 세굴을 고려하여 구조물의 고유주파수 변 동을 분석한 연구 (Yi et al, 2015(Yi et al, , 2016와 교각에 발생한 세 굴의 깊이를 구조물의 고유주파수를 이용하여 분석하고자 한 사례가 있다 (Park et al, 2005 (Jin, 2017;Yi et al, 2013;Yun et al, 2004).…”

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Identification of Dynamic Characteristics Using Vibration Measurement Data of Saemangeum Mangyeong Offshore Observation Tower and Numerical Model Updating by Pattern Search Method

Park¹,

Jun²,

Cho³

et al. 2020

J Korean Soc Coast Ocean Eng

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In the case of small observation towers located at sea, it is necessary to confirm the change in dynamic characteristics due to the influence of environmental loads. In this study, the dynamic characteristics were analyzed and the numerical analysis model was designed through field dynamic response measurement on the Mangyeong Offshore Observation Tower (Mangyeong Tower) located near the Saemangeum Embankment. As a result of the measurement, the natural frequency was found to increase slowly as the tide level is lowered. In addition, it was confirmed that the same mode has two frequencies, which was judged to be a phenomenon in which the natural frequency was partially increased when the pile and the ground contacted by scouring. For numerical analysis, the upper mass, artificial fixity point, scour depth and fluid influences are reflected in the structural characteristics of the Mangyeong Tower. In addition, the model updating from the estimated natural frequency and pattern search algorithm was performed. From the model updating, it is expected that it can be applied to future studies on stability of Mangyeong Tower.

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Identification of Dynamic Characteristics Using Vibration Measurement Data of Saemangeum Mangyeong Offshore Observation Tower and Numerical Model Updating by Pattern Search Method

Park¹,

Jun²,

Cho³

et al. 2020

J Korean Soc Coast Ocean Eng

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The study of marine sediment distribution characteristic interpolation based on GIS

Han

Wang

2020

Arab J Geosci

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Intense atmospheric frontogenesis by air–sea coupling processes during the passage of Typhoon Lingling captured at Ieodo Ocean Research Station

Yang

Moon

Bae

et al. 2022

Sci Rep

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The Ieodo Ocean Research Station (Ieodo ORS) is a fixed marine observation platform at the boundary of the Yellow and East China Seas. In 2019, a Category 4 Typhoon Lingling passed by the Ieodo ORS very closely. At that time, the Ieodo ORS observed Sea Surface Temperature (SST) cooling of 4.5 °C by vertical mixing and negative turbulent heat flux (i.e., the sum of sensible and latent heat fluxes) due to the SST cooling. In this study, uncoupled and coupled simulations were conducted to examine the role of air-sea interactions in changes in atmospheric frontogenesis around the typhoon passage. In the coupled simulation, SST cooling up to 6 °C occurred over the dangerous semicircle due to vertical mixing induced by wind stress. Strong wind stress also enhanced the SST gradient and, therefore, contributed to the formation of a steeper atmospheric frontal zone. Moreover, the comparison with reliable datasets supports the physical linkage between SST cooling and atmospheric frontogenesis by utilizing the meridional theta-e gradient and moisture convergence zone. Therefore, from the simulation results, we hope to improve our understanding of atmospheric frontogenesis by air–sea coupling processes in the future development of a coupled atmosphere–ocean modeling system.

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Monitoring of Structural Dynamic Characteristics of Socheongcho Ocean Research Station

Cited by 4 publications

References 0 publications

Identification of Dynamic Characteristics Using Vibration Measurement Data of Saemangeum Mangyeong Offshore Observation Tower and Numerical Model Updating by Pattern Search Method

Identification of Dynamic Characteristics Using Vibration Measurement Data of Saemangeum Mangyeong Offshore Observation Tower and Numerical Model Updating by Pattern Search Method

The study of marine sediment distribution characteristic interpolation based on GIS

Intense atmospheric frontogenesis by air–sea coupling processes during the passage of Typhoon Lingling captured at Ieodo Ocean Research Station

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