A method for predicting the radiated sound field of a three-dimensional structural sound source in a shallow sea channel
A technology of three-dimensional structure and radiated sound, which is applied in the direction of measuring ultrasonic/sonic/infrasonic waves, seismology and instruments in areas covered by water, and can solve problems such as complex channel environment, large amount of calculation, and many coupled physical fields , to achieve high calculation efficiency, high accuracy of calculation results, and strong adaptability to channel environment and structure
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[0091] The embodiment of the present invention is specifically described below in conjunction with theoretical models and calculation examples, see figure 2 , the calculation theoretical steps of the invention are briefly as follows:
[0092] Step a. First establish a multi-physics field coupling model in the shallow sea channel, solve the channel transfer function G in two-dimensional axisymmetric coordinates through the ocean acoustic propagation theory, and use the space transformation technology to perform the three-dimensional space transformation of the transfer function G.
[0093] Step b. Establish a multi-boundary multi-physics field coupling acoustic field calculation model under the shallow sea channel, and consider the interaction of structures, fluids, and shallow sea boundaries through fluid-solid coupling, acoustic boundary coupling, and PML technology to obtain the real structure surface under the influence of the shallow sea channel environment The vibration ...
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