Application of Lagrange's equation of motion to estimate natural frequencies of monopile foundations

Feng Chien Su, Chih Yin Chung, Sheng Yan Chiu, Ming Ju Wu, Yu Shu Kuo

研究成果: Paper同行評審

摘要

Determination of natural frequencies is essential to design offshore wind turbine foundations and is relevant to the stability of supporting structure. When the natural frequencies offshore wind turbine foundations are close to the external loading frequencies, excess deformations may occur due to resonance and lead to collapse of supporting structures. The natural frequencies of supporting structure change with foundation geometries, soil properties and structure stiffness. In the existing offshore wind farm in Europe, in most cases monopile foundations have been built as support structures for the wind turbine. To evaluate the natural frequencies and vibration responses of monopile foundation in the preliminary design of offshore wind turbine, a simplified method considered the pile-soil stiffness and deformation responses of supporting structure is presented in this study. The kinetic and strain energies of a structure system are applied to Lagrange's equation of motion to determine the natural frequency of monopile foundation. The natural frequencies of monopile foundation installed in soil with different properties can be determined quickly.

原文English
頁面671-679
頁數9
出版狀態Published - 2012 一月 1
事件6th Chinese-German Joint Symposium on Hydraulic and Ocean Engineering, CGJOINT 2012 - Keelung, Taiwan
持續時間: 2012 九月 232012 九月 29

Other

Other6th Chinese-German Joint Symposium on Hydraulic and Ocean Engineering, CGJOINT 2012
國家/地區Taiwan
城市Keelung
期間12-09-2312-09-29

All Science Journal Classification (ASJC) codes

  • 海洋工程
  • 水科學與技術

指紋

深入研究「Application of Lagrange's equation of motion to estimate natural frequencies of monopile foundations」主題。共同形成了獨特的指紋。

引用此