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利用水下地震-波流联合模拟实验系统研究了海底管线在波浪、水流和地震作用下的动态响应特征。实验中考虑了有无地震作用、悬跨长度、波浪高度、水深、水流速度以及是否满管状态等因素。通过DDP动态数据后处理软件对实验结果进行处理分析,得到海底悬跨管道的动态响应特性。实验结果表明:在浅海海域,悬跨管线的动态反应受波浪及水深变化的影响不明显,悬跨长度是影响管道动态响应的主要影响因素;悬跨管线在地震与波流共同作用下的反应与仅地震作用下的应变存在差别;在波浪力作用下,空管时管线的应变要小于满管时的情况。
The dynamic response characteristics of submarine pipeline under the action of wave, water current and earthquake are studied by underwater seismic-wave combined simulation system. In the experiment, the factors such as earthquake effect, length of suspension span, wave height, water depth, water flow rate and whether the pipe is full or not are considered. The experimental results were processed and analyzed by DDP dynamic data postprocessing software to get the dynamic response characteristics of subsea suspended pipelines. The experimental results show that the dynamic response of the suspended pipeline is not affected by the wave and water depth changes in the shallow sea area. The length of the suspension span is the main factor that affects the dynamic response of the pipeline. The response of the suspended pipeline under the combined action of the earthquake and the wave current Which is different from the strain under earthquake only. Under the action of wave force, the strain of the pipeline in the empty tube is smaller than that of the full tube.