damped frequency 中文意思是什麼
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An accurate modal superposition method for calculating frequency response function of viscoelastically damped structures
粘彈阻尼結構頻響函數計算的高精度模態展開法 -
Through the research on the sophisticated physical and mathematical separation technique of modes in experimental modal analysis, this thesis intends to improve the estimated accuracy and efficiency of modal parameters of highly damped structure or structure with close frequency modes and the automatization of the technique in the process of analysis
本文旨在研究實驗模態分析中先進的模態物理分離技術和模態數學分離技術，提高識別大阻尼或模態密集復雜結構模態參數的精確度與效率，提高分析中的自動化程度。 -
In viscoelastic media, the high frequency waves propagate and are damped more quickly than the low frequency ones, so that the shape of the wave will change continuously as it propagates
在粘彈性介質里，頻率高的波相對于頻率低的波而言不僅傳播快，同時也衰減快，這樣在傳播的過程中它的波形發生連續微小的變化。 -
The thesis mainly deals with the third part of across : " sompi " cepstrum methods. the principle and system structure of across a re first introduced. the propagation of wave in media is simply studied and its transfer function in frequency domain is modeled as superimposed damped exponential sinusoids, each damped exponential sinusoid is called as a wave element and its exponential index part consists of two factors : group velocity travel time and decayed factor
為此，首先介紹了across的原理與組成和通過簡單地討論地震波在介質中的傳播情況建立起介質的傳遞函數模型，指出：在一個狹窄的頻率窗口裡，介質的傳遞函數可以用有限個阻尼正弦項的疊加的形式表示，每個阻尼正弦項代表一個波成分，其指數部分包括兩個因子：波成分在介質中的傳播時間和衰減因子。 -
Damped natural frequency
阻尼固有頻率
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