1、

The effects of the rigid or free surface on acoustic power and radiation directivity radiated by a pulsating sphere are analytically studied.

数值结果表明:在低频和自由表面距离脉动球源较近时,自由表面的存在会大大地减小脉动球源的辐射声功率,自由表面对辐射声功率的影响可高达-40dB左右。

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2、

The pulsating pressure data measured in draft tube of hydro-turbine model test for the Three Gorges Power Station working under 73 m water head are utilized to generate the pulsating pressure field in the whole flow passage.

本文利用三峡电站73m水头水轮机模型试验中脉动压力的实测数据,构造出整个流道内脉动压力场,求出了厂房结构在各种振源联合作用下的动力响应。

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3、

Pulsating flow hydraulic ( PFH) system which transmit power and signal with the oil reciprocating vibration in the pipeline are common used in the mining, metallurgical, construction, manufacturing, scientific experiments and other industrial equipment.

油液在管道内以往复振动的形式传递功率和信号的交流液压系统常见于矿山、冶金、建筑、制造、科学试验等工业设备中。

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