复杂地形条件下浮式栈桥运动响应的频域分析

发布时间：2018-03-16 13:48

本文选题：浮桥工程　切入点：运动响应　出处：《中国造船》2017年02期 　论文类型：期刊论文

【摘要】：为了研究复杂地形条件下浮式栈桥的运动响应,并探讨波浪圆频率及浪向角等因素对浮式栈桥运动响应的影响。论文利用势流理论及波浪绕射/辐射理论对浮式栈桥所处流场的速度势进行了分析,并对复杂海底地形条件下浮式栈桥的运动特性进行了水池试验和数值模拟研究。基于水动力计算软件AQWA,将复杂海底地形作为一个潜体置于海底,进而考虑其与上部浮体及波浪的水动力干扰,从而建立了海底地形-浮式栈桥-波浪水动力耦合计算模型,模拟计算了浮式栈桥在复杂地形条件下的运动响应,并通过水池试验对数值计算结果进行了验证。结果表明,耦合计算模型能够较为准确地预报复杂地形条件下浮式栈桥的运动响应;复杂海底地形条件下浮式栈桥各桥节的运动响应有较显著的差异,且桥节RAOs随浪向角的变化曲线与平坦海底地形条件下的RAOs曲线有一定差异;浅水环境下海底地形对浮式栈桥运动响应和波浪传播特性的影响不能忽视。
[Abstract]:In order to study the motion response of floating trestle under complex terrain, The effects of wave circle frequency and wave direction angle on the response of floating trestle are discussed. The velocity potential of flow field in floating trestle is analyzed by using potential flow theory and wave diffraction / radiation theory. The motion characteristics of floating trestle under complex submarine topography are studied by tank test and numerical simulation. Based on hydrodynamic calculation software AQWA, the complex submarine topography is placed on the seabed as a submersible. Then considering the hydrodynamic interference with the upper floating body and wave, the coupled calculation model of submarine topography, floating trestle bridge and wave hydrodynamic is established, and the motion response of floating trestle bridge under complex terrain condition is simulated. The numerical results are verified by pool test. The results show that the coupled model can accurately predict the dynamic response of floating trestle under complex terrain. There are significant differences in the kinematic responses of the joints of the floating trestle under the complex submarine topography, and the variation curves of the RAOs with the wave direction are different from the RAOs curves under the flat submarine topography. The influence of submarine topography on the motion response and wave propagation characteristics of floating trestle can not be ignored in shallow water environment.
【作者单位】：中国船舶科学研究中心;解放军理工大学野战工程学院;
【基金】：工信部高性能船舶科研资助项目(工信部联装[2016]22号) 国家科技支撑计划课题(2014BAB16B05) 国家自然科学基金资助项目(51379213)
【分类号】：U448.19

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