structural frequency 中文意思是什麼

structural frequency 解釋
結構自振頻率
  • structural : adj. 構造上的，結構上的，組織上的。adv. -ly
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. Abstract : a conclusion has been proved indelail that only if the na tural frequency k of a symmetric structure is nota duplicate root, the vibra tion mode of the strusture must be symmetrical orantisymmetrical. this conclusio n is advantageous to simplify the structural dynamicanalysis and pratically usef ul

    文摘:給出了有關對稱結構體系的動力特性的一個結論：對稱的結構振動體系，對應于任一非重根的自振頻率，其主振型必定是對稱的或反對稱的.並給出了詳細的證明.應用這個結論，有利於對稱結構動力分析的簡化，具有實用價值
  2. We rounded analysis that ring stator ’ size parameter how to affect ring stator ’ characteristic frequency by use the software for numeric analysis, and afford theoretical foundation for the optimum design of ultrasonic motor ’ structural parameter

    本文還利用分析軟體，全面地分析了定子圓環各個尺寸參數對特徵頻率的影響，為超聲波電機結構參數的優化設計提供了理論依據。
  3. It can dynamically determine the structure information need to index according to real query loads and opti mization of index. second, to consider the effects of structural information on result relevance ranking, this dissertation proposes a ranking algorithm that consider both the frequency distribution and structural distribution of keywords in the result, and a dynamic element - oriented method to compute the weight of keywords

    第二，為考慮xml數據中的結構信息對查詢結果相關度值的影響，本文提出了一種綜合考慮關鍵字頻率分佈特徵和結構分佈特徵的查詢結果相關度演算法，以及一種基於節點的關鍵字權重計演算法，取得了更優的檢索性能。
  4. The main contents of this paper is according to the structural characteristic of forced vibration, making use of the varying quantity data of free frequency of two different physical cantilever beam on the structural damage experiment basis, then using the bp network, genetic algorithm and the genetic bp algorithm to build up relation model between position, extent of structural damnification, and the varying quantity of free frequency

    其主要內容就是根據結構受迫振動特性，利用試驗測得兩根不同物理性質懸臂梁在受損傷產生裂紋前後的固有頻率改變量，使用bp網路、遺傳演算法、遺傳bp演算法，建立了結構損傷的位置、程度與結構固有頻率損傷前後改變量之間的關系模型。
  5. Methods of structural damage detection based on frequency change

    基於頻率變化的結構損傷識別方法
  6. By using single strand conformation polymorphism analysis of polymerase chain reaction ( pcr - sscp ), the frequency of codon 54 mutant allele of mbl structural gene in the population of hans was investigated. 3. the molecular beacon ( mb ) hybridization technique with visual monitoring was established

    建立聚合酶鏈反應單鏈構象多態性分析inglestrandconforma tlonpolymorphlsmanalysisofpol仰erasechainreactionproduction ， pcr sscp ）方法，初步調查漢族人群mbl基因ggc54gac突變情況。
  7. The vibration of upper structure of bridge which caused by the dynamic action of vehicle pass the railway bridge may make the structural component fatigue and decrease the intensity and stability. the more vibration of bridge will influence the safety and stability of vehicles ; when the dynamic changing frequency of vehicle equal or approach to the free vibrational frequency of bridge, wh ich will make the resonance may intensify the response of bridge and vehicles

    列車動力作用引起橋樑上部結構的振動可能使結構構件產生疲勞，降低其強度和穩定性；橋梁振動過大可能會對橋上車輛的運行安全和穩定性產生影響；當列車的動力變化頻率與橋跨結構自振頻率相等或接近時，引起的共振可能會使車橋動力響應加劇。
  8. Consumer ' s personal characteristic including education, age, job, engaged in trade, family ' s monthly gross income, situation of relocation household and live in the area now, and the commercial residential building demand includes the house - purchase purpose, buy property frequency, house type demand, structural demand, house demand characteristic, house - purchase influence factor, sets of type area demand and price endurance, etc

    消費者個人特徵包括學歷、年齡、職業、從事行業、家庭月總收入、拆遷戶情況和現居住區域，而商品住宅需求包括購房目的、置業頻次、住宅類型需求、室內結構需求、住宅需求特徵、購房影響因素、套型面積需求和價格承受能力等。
  9. 3. with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit, we have successfully enhanced sensitivity, expanded dynamic range, increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption. 4

    3 、對通信機的全面改進，包括lna結構的調整、鎖相環環路濾波器的優化、發射部分結構的調整以及中頻解調電路的相差調整，提高了系統的接收靈敏度、改善了本振的頻譜純度、減少了鎖相環的鎖定時間、使中頻解調后的信號質量大為提高，同時還減少了體積、節約了系統的功耗。
  10. Topology optimization of truss structures with frequency constraint based on structural reliability

    具有頻率約束的桁架結構可靠性拓撲優化
  11. It is shown by structural seismic response of four wavelets that littlewood - paley wavelet is not suitable for structural seismic response, because structural response is too small, meyer wavelet is a better wavelet for structural seismic response, for it ' s structural response is agreement with the finite element method, and also harmonic wavelet, structural response under earthquake is a little bigger than finite element method, structural response under odd exponent wavelet is also bigger than finite element method, this method is very simple by wavelet transform, wavelet transform method is different from old methods, one is with which not only knows the effects of earthquake wave detail frequency - band on structural response, but also considers earthquake wave ' s non - stationary of frequency and time - domain value, another is the second mode shape and higher mode shape response that do n ' t attenuate so fast

    通過對這四種小波的結構地震反應分析研究說明： littlewood ? paley小波不適合於用來作結構地震反應分析，因為在littlewood ? paley小波下的結構地震反應太小，不符合實際情況；用meyer小波作結構地震反應分析比較合適，和有限元法的結果比較接近；也可以用諧波小波來作結構地震反應分析，只是在諧波小波下的結果略為偏大；單邊指數小波下的結構地震反應分析比有限元法稍大一點，它通過小波變換大大簡化了結構地震反應分析。用小波變換方法來進行結構地震反應分析和以往方法不同的是：它不僅可以知道地震波的具體頻率段對結構反應的影響，而且同時考慮了地震波的幅值非平穩性以及頻率非平穩性；另外與以前方法得到的結果有差異的是，第二振型及以後的高一點的振型的反應沒有以前的方法衰減得快。
  12. With the increasing of digital cable transmission frequency, srl ( structural return loss ) on - line evaluation using diameter data of digital cable core became a method of cable quality control. higher measuring precision and higher measuring speed of the diameter gauge was required

    此外，由於數字通信電纜傳輸頻帶的提高，對均勻性要求也不斷提高，採用直徑信息來在線評估數字通信電纜的srl （結構回波損耗）成為也質量控制一種方法，這就對測徑儀的測試性能提出了更高的要求。
  13. Under these assumptions, three kinds of excitations, namely, harmonic force with frequency equal to the structural fundamental frequency, harmonic force with frequency equal to half of the structural fundamental frequency and pulse force are inputted to the undamaged and damaged structures. then under the same excitation, the undamaged structural displacement responses, velocity responses, acceleration responses, jerk responses and responses of integrated displacement are compared with that of the damaged ones

    在此假定基礎上，分別將激勵頻率等於結構基頻的簡諧形激勵、激勵頻率等於結構基頻之半的簡諧形激勵和錘擊激勵輸入結構，而後比較了損傷前後結構在相同激勵下的位移響應、速度響應、加速度響應、加加速度響應和位移積分響應。
  14. In this paper, through the self oscillation analysis and the earthquake response analysis, the frequency, the oscillation mode, the transverse and vertical earthquake response of the different cable form projects and the relevant single - layer spherical latticed shell were compared, the effect of different cable form projects to the structural dynamical stability was obtained

    本文對選定的三個布索方案進行了自振特性分析和地震響應分析，比較了各方案的頻率、振型以及橫向和豎向地震反應，並和相應單層球面網殼進行了對比，得到了布索圈數對結構動力性能的影響。
  15. Based on the optimal topological, structural modification has been implemented ; and it makes the structure has higher first - order natural frequency and less weight

    在最優拓撲結構的基礎上進行結構修改後，一階固有頻率明顯提高，而重量有所減小。
  16. With an analysis of the influence of service frequency, the cars organization on the available length of the platform, and the influence of the station, the circumstance control system, as well as the equipment on the scales of station, the author agrues that the station scale shall be reduced by way of increasing the service frequency, cutting down the length of the platform, compressing the structural height of the station, so as to reach the goal of rational distribution of the auxiliary establishments

    摘要通過分析發車頻率及列車編組對站臺有效長度的影響，以及車站結構型式、環控系統制式的選取和車站設施的布置對于車站面積的影響，初步探討了縮小車站規模的方法和途徑：提高發車頻率，以縮短站臺有效長度；選擇合理的車站層數來壓縮車站的高度；從環控系統的選取以及各種設施用房的合理布置上來減少車站用房面積。
  17. So the result is more accurate than old methods. the result of structural energy response based on wavelet provides a practicable method for structure design and design energy dissipation system in structure, this chapter ' s analysis and contrast tell us littlewood - paley wavelet is not suitable for analyzing energy of earthquake ground motion and structural energy response. on the purpose of calculating energy, meyer wavelet must be modified so that its frequency integral is a constant, the result of energy by modified meyer wavelet and harmonic wavelet is practicable, only the later is bigger but in the same energy level

    通過三種小波基（ littlewood ? paley小波、 meyer小波、諧波小波）下的地震地面運動能量分析以及結構地震能量反應分析說明：直接通過加速度記錄可以求得地震動能量，由於小波系數中同時含有時域和頻域的能量，由此得出的能量比以往的方法更準確；在此基礎上求得了結構的能量反應時程，為結構設計及結構中設計耗能體系提供了具體的方法；通過這一章對比分析得出， littlewood ? paley小波不適合於作地震動能量分析和結構能量反應分析。
  18. Three kinds of excitations, namely, harmonic force with frequency equal to the structural fundamental frequency, harmonic force with frequency equal to half of the structural fundamental frequency and pulse force are applied to such four kinds of models. the displacement responses of the four kinds of models are calculated using sap2000 and the integrations of displacement responses are obtained by numerical calculations

    將三種激勵形式:激勵頻率等於結構基頻的簡諧形激勵、激勵頻率等於結構基頻之半的簡諧形激勵和錘擊激勵分別施加在這四種模型上，通過計算得到四種模型的位移響應，進而得到位移積分響應。
  19. The computation of the sensitivity of structural frequency response and its response modification

    結構頻率響應靈敏度計算及響應修改研究
  20. Since the structural dynamic characteristic will be changed with its damage, the great difference of structural frequency exists between the theoretical value and the practical value. the problem we are confronted with is how to correct structural fem to make the theoretical value equal to the practical value

    由於模型描述實際結構的不精確性，結構模態參數的實測值與有限元理論值之間常常存在較大的差異，因而迫切需要解決的問題便是如何對有限元模型進行修正，使得模型模態特性的理論值趨近於實測值。
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