四川兵工学报
四川兵工學報
사천병공학보
SICHUAN ORDNANCE JOURNAL
2014年
12期
143-145
,共3页
矩形板%临界频率%声辐射效率%声元设计
矩形闆%臨界頻率%聲輻射效率%聲元設計
구형판%림계빈솔%성복사효솔%성원설계
rectangular Plate%coincidence frequency%sound radiation efficiency%acoustic element design
首先建立无限大薄板的声辐射模型，分析其在不同振动频率下的声辐射效率，进而分析有限大矩形板的声辐射效率随激振频率的变化规律，并从相元的角度探究矩形平板在临界频率附近的声辐射效率趋近于1的原因。结果表明，若将板表面划分成活塞小单元，随着频率的增大，对声辐射贡献的活塞单元越多，所以高频时结构的声辐射效率趋近于1。
首先建立無限大薄闆的聲輻射模型，分析其在不同振動頻率下的聲輻射效率，進而分析有限大矩形闆的聲輻射效率隨激振頻率的變化規律，併從相元的角度探究矩形平闆在臨界頻率附近的聲輻射效率趨近于1的原因。結果錶明，若將闆錶麵劃分成活塞小單元，隨著頻率的增大，對聲輻射貢獻的活塞單元越多，所以高頻時結構的聲輻射效率趨近于1。
수선건립무한대박판적성복사모형，분석기재불동진동빈솔하적성복사효솔，진이분석유한대구형판적성복사효솔수격진빈솔적변화규률，병종상원적각도탐구구형평판재림계빈솔부근적성복사효솔추근우1적원인。결과표명，약장판표면화분성활새소단원，수착빈솔적증대，대성복사공헌적활새단원월다，소이고빈시결구적성복사효솔추근우1。
An infinite Plate radiation model is established in this PaPer,the sound radiation efficiency of the different vibration frequencies is researched. And then,acoustic radiation efficiency of rectangular Plate with excitation frequency is discussed. In the follow research,the reason of the rectangular Plate’s sound radiation efficiency tends to unit near the coincidence frequencies using the Phase source method. Conclusion is drawn that,if we divide the Plate surface into small unit of Pistons,the Piston unit number which make contribution to sound radiation will increase with the increasing frequency. So at the high fre﹣quency,the sound radiation efficiency tends to unit.
