LIU Gao, CHEN Shang-you, LIU Tian-cheng, WANG Kun-peng. An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges[J]. Applied Mathematics and Mechanics, 2017, 38(1): 75-89. doi: 10.21656/1000-0887.370553
 Citation: LIU Gao, CHEN Shang-you, LIU Tian-cheng, WANG Kun-peng. An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges[J]. Applied Mathematics and Mechanics, 2017, 38(1): 75-89.

# An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges

##### doi: 10.21656/1000-0887.370553
Funds:  The National Hightech R&D Program of China (863 Program)（2007AA11Z101）
• Rev Recd Date: 2016-12-23
• Publish Date: 2017-01-15
• The motion equation for wind-wave-bridge coupling systems was established, based on the combination of the finite element method and the boundary element method, to consider the characteristic parameters’ correlation of the wind-wave coupling fields. In turn, the wave induced force acting on the large-scale deepwater foundation was calculated according to the potential flow theory and the boundary element method firstly, then transferred to the finite element model of the foundation based on the finite/boundary element mapping relation; the aerodynamic forces acting on the bridge were calculated with the finite element method, including the fluctuating wind induced unsteady buffeting force and the aeroelasticity interaction induced self-excited force. By means of the pseudo-excitation method, the random vibration analysis framework for the wind-wave-bridge coupling system was developed. A sea-crossing super-large bridge scheme was taken for example. The research shows, the wind-wave coupling induced bridge foundation internal forces are significantly larger than those induced by wind alone, of which the shear forces are mainly caused by wave, and the lateral moments caused by wave are equal to those caused by wind near the seabed but are larger below. So, the wind-wave coupling effects should be considered in the design of sea-crossing bridges.
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沈阳化工大学材料科学与工程学院 沈阳 110142

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