Bahari Ako, Popplewell Neil
Sound & Vibration Laboratory, Department of Mechanical Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
J Acoust Soc Am. 2015 May;137(5):2966-9. doi: 10.1121/1.4919293.
A closed form solution was derived previously for the response of a submerged spherical shell when the shell was excited by a spatially distributed, transient load at its inner surface [Zakout (2001). J. Acoust. Soc. Am. 109(6), 2789-2796]. Numerical results were presented for the modal and total acoustic pressures outside the empty sphere when the load's temporal history corresponded to the Heaviside step function. However, the result presented for the shell's "breathing" mode was inconsistent with these data as it corresponded to the delta Dirac (impulse) function. Furthermore, numerical results, which were given later for the total acoustic pressure responses, did not involve either of these excitations. Consequently the present objective is to rectify these anomalies.
先前已经推导出了一个封闭形式的解，用于描述当浸没在水中的球形壳内表面受到空间分布的瞬态载荷激励时的响应[扎库特（2001年）。《美国声学学会杂志》109(6)，2789 - 2796]。当载荷的时间历程对应于海维赛德阶跃函数时，给出了空球外部模态声压和总声压的数值结果。然而，给出的壳“呼吸”模态的结果与这些数据不一致，因为它对应于狄拉克δ（脉冲）函数。此外，后来给出的总声压响应的数值结果并不涉及这两种激励中的任何一种。因此，当前的目标是纠正这些异常情况。
