STRUCTURE-MODIFIED INFLUENCE ON THE INTERIOR SOUND FIELD AND ACOUSTIC SHAPE SENSITIVITY ANALYSIS

The covering-domain method is adopted to calculate first the interior sound field of a complex-shaped cavity stiffened with stringers, then the influence of an appended mass on the complex cavity wall is further analyzed based on the covering-domain method. Besides, the method is applied to analyze acoustic shape sensitivity of complex-shaped cavity. Combining a specific cavity, we calculate the corresponding acoustic shape sensitivity when every dimension of the cavity varies respectively. This will provide theoretical instruction for dynamic structural modification of the complex-shaped cavity.