CAJ | 학술논문

为得到水流作用下管道的实时振动响应和位移值，提出动态应变测试和数据分析方法。通过小波变换对采集的应变数据进行去噪处理，利用Morlet小波对测试数据进行时间－频域分析，得到管道振动频率随时间变化规律，结合振型分解法求解管道各点振动实时位移。在大型波浪流水槽中布置光纤光栅传感器，进行管道振动实验，对该方法进行验证，结果表明可实现水下输油管道实时动态监控。
위득도수류작용하관도적실시진동향응화위이치，제출동태응변측시화수거분석방법。통과소파변환대채집적응변수거진행거조처리，이용Morlet소파대측시수거진행시간－빈역분석，득도관도진동빈솔수시간변화규률，결합진형분해법구해관도각점진동실시위이。재대형파랑류수조중포치광섬광책전감기，진행관도진동실험，대해방법진행험증，결과표명가실현수하수유관도실시동태감공。
In order to acquire the real-time vibration response and displacement of pipeline subject to current, the dynamic strain measuring and data analyzing method is proposed.Denoised strain data is gained by wavelet transform denoising technolo-gy.Through the Morlet wavelet transform analysis, the pipe vibration frequencies that varied with time are obtained.Real-time amplitudes of oscillation at each point of pipeline are solved by using the modal decomposition method.Model experiment of pipe-line vibration with fiber bragg grating sensing technology is conducted in a large wave-current flume to validate the method.