CAJ | 학술논문

基于模拟生成的两个具有不同非线性特性的桥梁断面涡激振动系统对传统经验非线性模型做了进一步研究，研究表明经验非线性模型虽然很好模拟了原始系统自限幅振动特性，却无法模拟系统非线性气动力的形式。提出了一种基于力-状态映射的涡振分析方法，该方法既可以模拟系统自限幅振动特性，也可以模拟系统气动力的形式。并且，可以通过均方差(MSE)和重要性指数对总体气动力中的各项贡献进行评价，为气动力形式的确定提供依据。
기우모의생성적량개구유불동비선성특성적교량단면와격진동계통대전통경험비선성모형주료진일보연구，연구표명경험비선성모형수연흔호모의료원시계통자한폭진동특성，각무법모의계통비선성기동력적형식。제출료일충기우력-상태영사적와진분석방법，해방법기가이모의계통자한폭진동특성，야가이모의계통기동력적형식。병차，가이통과균방차(MSE)화중요성지수대총체기동력중적각항공헌진행평개，위기동력형식적학정제공의거。
A detailed study on the conventional nonlinear semi-empirical model was conducted through two different vortex-in-duced vibration (VIV)systems of bridge decks.Results indicate that the nonlinear semi-empirical model can reproduce the lim-it cycle oscillation (LCO)of the original systems,but it cannot reproduce the forms of nonlinear aerodynamic forces.A new approach,which is based on the force-state mapping method,was proposed for simulating the VIV of original systems.This approach performs well in simulating both the LCO and the aerodynamic forces of the original systems.Moreover,the mean square error (MSE)and the significant factor can be used as a criterion in determining the form of nonlinearities in aerodynamic forces.