finite amplitude 中文意思是什麼
finite amplitude
解釋
有限振幅-
Damping wakes possible finite steady-state vibration amplitude at resonance.
在共振時，阻尼可能限制穩定振動的振幅。 -
We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna. then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys. through the analysis we got the system ' s connatural characteristic, the amplitude - frequency characteristic of harmonic response, the power spectrum density of random vibration response, the maximal amplitude and resuming time of impact response
其次藉助ansys有限元分析軟體，對系統進行了模態分析和動力學響應分析，獲得了不同天線結構參數下的衛星?天線系統的固有特性，簡諧響應的幅頻特性，隨機振動響應的功率譜密度，以及沖擊響應的最大幅值和恢復時間等。 -
Aapproximation of fourier inverse integral using fourier transform approximation for amplitude of harmonics in a finite fourier series summation
富氏級數中之諧波成份以富氏轉換近似並以有限級數和近似富氏逆轉換。 -
The wing is modeled structurally by vibrational modes, which are used as amplitude of motion by a finite element analysis. conservative full - potential equation and three dimensional unsteady euler equation are used to compute the unsteady transonic flows around airfoil and wings under simple harmonic motion
以給定機翼模態分佈下機翼上各點的模態值作為運動幅值，以三維非定常全位勢方程和三維非定常euler方程為控制方程，求解三維機翼簡諧運動下的非定常氣動力。 -
Three finite - difference methods, i. e., stagger grid, implicit and explicit algorithms, are analyzed in detail. multi - grid algorithm is firstly introduced in elastic wave simulation, to solve for the stability problem inherent in stagger grid and implicit algorithm, also for the efficiency problem inherent in explicit algorithm, and the precision, stability and efficiency for simulation of elastic wave arc increased by multi - grid method. phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation, based on phase delay and amplitude decaying features along wave propagation
在水平分層介質接收函數的波形反演研究的基礎上，本文系統闡述了非均勻介質中彈性波傳播數值模擬常用的三種有限差分方法：顯式差分、隱式差分和交錯網格法，首次將多重網格演算法應用於彈性波方程的數值模擬問題，克服了交錯網格法和顯式差分法穩定性差，以及隱式差分法計算效率低的缺點，大大提高了彈性波數值模擬的精度、穩定性和計算效率。 -
To study the acoustic unsteady combustion of srm, built the acoustic model of chamber. deduced the little amplitude sound wave 3d equation, used the finite volume discrete method to simulate. got the vibration model of three kinds of chamber
為研究固體火箭發動機聲不穩定燃燒特性，建立了燃燒室內聲學特性分析的物理數學模型，推導了小振幅聲波三維波動方程，採用有限體積離散方法進行模擬，得到圓柱型、四片翼柱彤和五片翼柱型藥柱三種燃燒室形狀聲學振動基本模態 -
Stress concentration measure on the model of boiler drum with two nozzles was executed and the testing results were compared with the asme criterion, experiential value and the value of finite element method respectively. this measurement result provides direction for evaluation of stress amplitude
設計模擬汽包進行應力測試，並與美國asme規范和經驗公式計算值、有限元計算結果進行比較，為后續的低周疲勞壽命估算時交變應力幅值的確定提供依據。 -
In this topic, the error characteristic of resistance voltage sensor was analyzed in theory, by using electric circuit analysis, the reasons which affected its error were gotten. based on theory analyses, initial structure was designed. then by using fem ( finite element method ) of simple resonance field, several structures electromagnetic field was calculated, and their amplitude errors, phase errors, maximum of electric field intensity and frequency characteristic of amplitude error were contrasted
本文從理論上分析了電阻式電壓傳感器的誤差，用電路分析法定性的研究了影響電阻分壓器誤差的因素；在理論分析的基礎上進行了電阻分壓器結構的初步設計；基於該設計，利用簡諧場的有限元方法進行了場的計算，比較了幾種結構方案的幅值誤差、相角誤差、最大場強值及其幅值誤差的頻率特性，從而得到一種最優方案；製作了分壓器樣機，並在本實驗室進行了實驗；最後，對電子電路部分進行了初步設計，並提出了抗干擾的措施。 -
Then the general plan of underwater vibrators is put forward. in chapter 3, combining fluid - solid coupling theory and mechanical vibration theory, we get the coupling equation of moving parts and water. the dynamic characteristics of moving parts are studied with theory of finite element, and additional mass of moving parts is found in fluid - solid coupling field, which makes vibrator ' s natural frequency descend and amplitude - frequency curve downward shift
第三章運用流固耦合理論和機械振動學理論相結合的方法建立運動部件與水的耦合運動方程，利用有限元法對其的動態特性進行了研究，得到了在流固耦合場下運動部件存在的附加質量，該附加質量導致固有頻率下降，單位推力下的加速度頻響曲線整體下移。 -
Based on the analyzing of the dss ' s basic theory of tomography, an inversion scheme that can be described as the combination of the finite - difference inversion and ray inversion using traveltime, amplitude and gravity data is proposed
在分析深地震測深剖面層析成像基本理論的基礎上提出了利用走時、振幅和重力數據，通過有限差分反演和射線反演方法對地殼上地幔結構進行層析成像的研究思路。 -
Digital halftoning technique, which is on basis of human visual attribution and color characteristic of image, is the tone rendition technology of transforming an image with greater amplitude resolution to one with lesser amplitude on two levels or on finite levels by mathematics and computer
數字半色調技術是基於人眼的視覺特性和圖像的成色特性，利用數學、計算機等工具，在二值設備或有限灰度級設備上實現圖像再現的一門技術。 -
Finite amplitude wave
有限振幅波 -
The direct solution for u ~ u and u ~ p form, the stagger solution for u ~ p form are compared in the convergency, stability and efficiency, from which it is concluded that the first solution used not widely before is characterized with weakly ill - conditioned stiffness and comparatively high efficiency. the finite element methods based on these three solving procedures are numerically implemented. the seabed soil under wave pressure with small amplitude can be viewed as elastic material
詳細比較廣義biot理論u u形式直接解法、 u p形式直接解法與交叉迭代法求解彈性、彈塑性問題的收斂性、穩定性與計算效率，認為以往較少應用的u u形式直接解法剛度陣病態性弱，求解效率高，更適合土工問題的數值模擬，小風浪作用下海床的動力響應特性可視為彈性的。 -
The former adds a strong restriction to the latter, thus denoting that the subcritical instability easily occurs for a finite - amplitude disturbance in the real atmosphere. the new criterion has greatly improved the previous results
該判據表明，在實際大氣中對于有限振幅擾動容易產生斜壓亞臨界不穩定，它大大地改進了以前的結果。
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