An impedance technique of modeling fluid-loaded structures is proposed. The fluid loading effect is expressed discretely using the frequency response function, and then a formulation that assembles the acoustic impedance and the structural impedance is developed to determine the response of the fluid-loaded structure. The advantage is that the response of the fluid-loaded structure can be found without deriving the equation of motion, which usually encounters difficulties when the structure is either in an irregular shape or with complicated boundary conditions. The fluid loading calculated using the impedance technique is validated numerically, and its accuracy depends on the size of the structural segment relative to the acoustic wavelength. Although this modeling technique is effective provided that the acoustic wavelength is larger than that of the structural segment, however, for a heavy fluid loading the validness of this model can be extended to higher frequencies.
展开▼
