地震载荷作用下海洋平台振动控制仿真研究
|
摘要
分别以海洋平台的前三阶固有频率作为被控频率,振动控制系统的参数在最优参数区间内取值,应用ANSYS有限元分析软件,对海洋平台在三维地震载荷作用下的振动控制进行仿真研究。结果表明,地震载荷作用下,振动控制系统具有明显的减振效果,减振率都在60%以上。控制平台的第一阶固有频率可以得到很好的振动控制效果。同时控制平台的前二、三阶固有频率,振动控制效果在Y和Z方向有所提高,分别为10%和20%左右。
The simulation of vibration control of offshore platforms under earthquake loadings was performed by using the ANSYS,in which the first 3 order natural frequencies of the platform were controlled by the ETMD system where the parameters of the system were taken in the optimal regions.The results showed that the ETMD system can reduce the vibration of the platform effectively under earthquake loadings.Another important conclusion was that reasonable control effects can be obtained by control the first order natural frequency.The control effects increase 10% and 20% in Y and Z directions when the first two and three order natural frequencies are controlled simultaneously.
The simulation of vibration control of offshore platforms under earthquake loadings was performed by using the ANSYS,in which the first 3 order natural frequencies of the platform were controlled by the ETMD system where the parameters of the system were taken in the optimal regions.The results showed that the ETMD system can reduce the vibration of the platform effectively under earthquake loadings.Another important conclusion was that reasonable control effects can be obtained by control the first order natural frequency.The control effects increase 10% and 20% in Y and Z directions when the first two and three order natural frequencies are controlled simultaneously.
引文
[1]霍发力,嵇春艳,陈明璐,等.海洋平台的滑移模态控制MRFD半主动振动控制研究[J].船海工程,2009,38(2):118-119.
[2]马汝建,赵东,王威强,等.ETMD在振动控制中的应用[J].济南大学学报,2005,19(1):89.
[3]王均刚.海洋平台振动控制研究及相似模型设计[D].济南:济南大学,2007.
[4]王均刚,马汝建,赵东.ETMD系统振动控制效果分析[J].山东科技大学学报:自然科学版,2007,26(pl):14-16.
[5]LI C.Performance of multiple tuned mass damper forattenuating undesirable structure under the groundacceleration[J].Earthquake Engineering&StructuralDynamics,2000,29(9):1405-1421.
[6]AYMAN B.MAHFOU Z.Predicting the capability-polar-plots for dynamic positioning systems for off-shore platforms using artificial neural networks[J].Ocean Engineering,2007,34(8):1151-1163.
[2]马汝建,赵东,王威强,等.ETMD在振动控制中的应用[J].济南大学学报,2005,19(1):89.
[3]王均刚.海洋平台振动控制研究及相似模型设计[D].济南:济南大学,2007.
[4]王均刚,马汝建,赵东.ETMD系统振动控制效果分析[J].山东科技大学学报:自然科学版,2007,26(pl):14-16.
[5]LI C.Performance of multiple tuned mass damper forattenuating undesirable structure under the groundacceleration[J].Earthquake Engineering&StructuralDynamics,2000,29(9):1405-1421.
[6]AYMAN B.MAHFOU Z.Predicting the capability-polar-plots for dynamic positioning systems for off-shore platforms using artificial neural networks[J].Ocean Engineering,2007,34(8):1151-1163.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心