噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
1期
119-122,126
,共5页
声学%声辐射%声功率灵敏度%层合板
聲學%聲輻射%聲功率靈敏度%層閤闆
성학%성복사%성공솔령민도%층합판
acoustic%sound radiation%sound power sensitivity%laminate plate
采用分层理论结合有限元模型分析复合材料层合板结构的振动特性，并用声辐射模态理论进行结构声辐射分析。在此基础上，分析声功率关于设计参数的灵敏度，推导声功率灵敏度的表达公式。以四层复合材料层合板为例，着重对声功率关于层合板结构铺层角度和铺层厚度的灵敏度进行了分析研究。数值计算结果显示在层合板基频处，辐射声功率达到最大值，同时在该处灵敏度有明显的升降过程。另外，对于低噪声层合板应以±45°对称的铺设将是最为恰当的设计方案。
採用分層理論結閤有限元模型分析複閤材料層閤闆結構的振動特性，併用聲輻射模態理論進行結構聲輻射分析。在此基礎上，分析聲功率關于設計參數的靈敏度，推導聲功率靈敏度的錶達公式。以四層複閤材料層閤闆為例，著重對聲功率關于層閤闆結構鋪層角度和鋪層厚度的靈敏度進行瞭分析研究。數值計算結果顯示在層閤闆基頻處，輻射聲功率達到最大值，同時在該處靈敏度有明顯的升降過程。另外，對于低譟聲層閤闆應以±45°對稱的鋪設將是最為恰噹的設計方案。
채용분층이론결합유한원모형분석복합재료층합판결구적진동특성，병용성복사모태이론진행결구성복사분석。재차기출상，분석성공솔관우설계삼수적령민도，추도성공솔령민도적표체공식。이사층복합재료층합판위례，착중대성공솔관우층합판결구포층각도화포층후도적령민도진행료분석연구。수치계산결과현시재층합판기빈처，복사성공솔체도최대치，동시재해처령민도유명현적승강과정。령외，대우저조성층합판응이±45°대칭적포설장시최위흡당적설계방안。
The vibration characteristic of a composite laminate plate was studied by using FEM and laminate plate theo-ry, and the sound radiation mode method was used to analyze the structural sound radiation of the plate. Then, the sound radi-ation sensitivity to design parameters was analyzed by using the sound radiation power and its expression was formulated. A four-layer composite plate was used as an example, and the sound power sensitivities to the ply angles and thickness of the plate were investigated. The numerical simulations show that the 45° symmetric ply angle is the best for the laminate plate, and the noise of the plate can be reduced significantly. In addition, the acoustic power reaches the maximum at the fundamen-tal frequency of the laminate plate. Meanwhile, the acoustic power sensitivity has a peak value also at this frequency.
