The invention relates to grounding vibration experimental method and
system of a steel
catenary riser. The grounding vibration experimental method of the steel
catenary riser comprises the following steps of, firstly, arranging a
flume, paving clay which has close
physical property and
mechanical property with prototype
seabed soil at the bottom of the
flume, arranging a wave absorbing region at the end of the
flume, arranging a water outlet on the flume above the wave absorbing region, and simulating an
ocean current in a riser grounding region in a mode of circulating refluxing of
effluent, wherein the
water level in the flume is higher than the upper surface of the clay; secondly, with the application of a method of truncation
simulation, arranging a riser grounding segment model in the limited flume, applying the
vertical load and the horizontal lateral load at one end of the riser grounding segment model, and simulating grounding vibration of the steel
catenary riser caused by motion of a floating body and a
seabed groove formed with
pipe-soil interaction; and thirdly, through an acceleration sensor and a
strain gauge which are arranged on the riser grounding segment model at intervals, collecting a response
signal of grounding vibration of the model, thereby influences on grounding vibration of the steel catenary riser of the
seabed surface soil body property and different flow rate damping conditions are acquired.