Non-Resonant Response of Stiffened Plate Structure Using Statistical Energy Analysis

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Project title

Code/計畫編號

NSC97-2221-E019-052

Translated Name/計畫中文名

加筋板結構非共振響應之統計能量分析

Project Coordinator/計畫主持人

Rong-Juin Shyu

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=1695819

Year

2008

Start date/計畫起

01-08-2008

Expected Completion/計畫迄

01-07-2009

Bugetid/研究經費

810千元

ResearchField/研究領域

機械工程

"在分析聲振耦合的問題時，統計能量法是常採用的分析方法，但是在處理結構被聲激勵的問題時，傳統的統計能量法，忽略結構非共振響應的計算。這在當結構的共振響應遠高於非共振時，以傳統統計能量法進行預估不會造成太大的影響，但是當結構的非共振響應值的大小接近甚至高於共振響應時，以傳統的統計能量法進行預估就會造成很大的誤差，本單位近年在統計能量法非共振傳遞的相關研究結果顯示[17-19]，考量非共振能量計算可以提昇立論預估的精確度；本計劃將對工程應用上常採用的加筋板結構進行研究，對不同構型的加筋板結構，其非共振響應與共振響應傳遞進行理論推導，建立修正的統計能量模型，對被聲激勵的加筋板結構響應，分別預估其共振與非共振振型的結構響應，以及板被激振後二次輻射噪音值，並進行實驗量測比對。一旦此分析之數值模型建立完成後，即可望能更準確預估加筋板結構振動量以及二次輻射噪音，以為船舶及航太降低振動與靜音工程應用。" "Although statistical energy analysis (SEA) is a suitable framework for predicting vibro-acoustic response, it has been found that when excited acoustically, conventional SEA does not predict the non-resonant response of structure. When the non-resonant structural response was as significant as the resonant response, it can lead large error by using conventional SEA prediction. Recently, our study indicates that the non-resonant response component should be included in the estimated responses to enhance predictive accuracy [17-19]. In this project, study is focused on the modeling of non-resonant energy transfer between acoustic field and stiffened plate. A modified SEA model is introduced to predict the non-resonant and resonant response for several kinds of stiffened plate. The estimated non-resonant and resonant responses are then compared with those obtained experimentally. Once the Modified SEA model has been established and verified, the modeling procedure can be used to enhance predictive accuracy."

Keyword(s)

統計能量法
非共振響應
加筋板
statistical energy analysis
non-resonant response
stiffened plate

DSpace CRIS

Non-Resonant Response of Stiffened Plate Structure Using Statistical Energy Analysis

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