natural frequency mode 中文意思是什麼
natural frequency mode
解釋
固有振動型式-
By calculating large quantity of examples, this text studies earthquake resistant behavior of tapered portal frame with pined bases and analyzes its natural frequency, natural period of vibration and vibration mode. by comparing interior forces of pillar top, beam end and span midpoint in two conditions that seismic action effect participates combination of forces and not when portal frame is n ' t changed, ensure conditions that combination of seismic action effect has controlling f unction during tapered portal frame design, and tapered portal frame demands anti - earthquake design
本文通過大量算例分析，研究柱腳鉸接楔形變截面門式剛架的抗震性能，並對其自振頻率、振型進行了分析；通過比較地震作用效應參與荷載組合與不參與荷載組合兩種情況下，樑柱截面尺寸不變時，柱上端、梁端、跨中截面處的內力大小，確定在什麼情況下地震作用效應組合起控製作用，變截面門式剛架需要進行抗震設計。 -
In the former, two computing modes of fem are built, aimed at the coupling of variable - profile pylon, curved - axis arch and flexible cable. the software algor feas is used to get the results of dynamic numerical analysis, such as natural vibration frequency, vibration mode, dynamic displacement, dynamic stress, which are compared with the results of shaking table test research to draw to important conclusions. these conclusions provide not only potent basis for the design and construction of nanjing century tower, but also reference for other pylon - cable - arch structures similar to the project
在動態數值分析中，針對世紀塔變截面的塔身，曲線軸線的拱以及柔性拉索相互耦合時清況，建立兩種有限元計算模式，利用有限元軟體algorfeas得到動力數值分析的結果，如：自振頻率、振型、動位移、動應力等等，再和振動臺試驗研究成果作比較，得到一些重要的結論，從而為南京世紀塔工程的設計和施工提供強有力的依據，而且為類以於世紀塔工程的其它塔-索-拱結構的設計也提供一定的參考。 -
Compared with non - slung - load flight, additional aerodynamic load, gravity load should be considered in the slung - load system. so the moment to the gravity center, flight mode and the natural frequency will change
直升機吊掛飛行，與直升機非吊掛飛行狀態相比，增加了新的氣動載荷、重力載荷，和因此產生的對直升機重心的力矩，其飛行運動模式、低頻振蕩固有頻率均發生改變。 -
Taking natural frequency and mode as damage principle, damage detection is studied as optimal problem based on genetic algorithm, and damage indices, symmetry and precision in the damage detection is discussed. numerical simulation of the damage detection of offshore platforms using genetic algorithm proves the feasibility of genetic algorithm in damage detection of large structure ; program all the process of genetic algorithm in damage detection into damage detection system
以實測的固有頻率和振型為診斷依據，將損傷診斷問題歸結為優化問題，採用遺傳演算法加以研究，以10單元固端梁的損傷診斷為基礎，討論了診斷中出現的損傷指標，損傷對稱性和變量精度等問題；將遺傳演算法的損傷診斷應用於海洋平臺，驗證了遺傳演算法用於大型結構損傷診斷的可能性；並用matlab將遺傳演算法應用於損傷診斷的全過程編製成損傷診斷系統。 -
The dynamic response of the experiment model is studied by transfer function response, and the natural frequency and vibration mode of the vibration system are measured, the dynamic characteristic is mastered, which provides the experiment test method of dynamic data for the structure design of reinforced concrete and the shock absorber design of the system, especially provides the design rules to vibration control of the machine equipment which are built in the building structure
用傳遞函數響應方法對實驗模型進行動態響應實驗研究，測得振動系統的固有頻率和振型，掌握振動系統的動態特性，為鋼筋混凝土建築的結構設計和系統減振設計提供動力學的實驗測試方法，尤其給安裝在建築物內機械設備的振動控制提供了設計依據。 -
To reduce the number of design variables, the sensitivity of both natural frequency and mode shape vector to component geometry parameters were derived respectively
為優選設計變量，分別推導了固有頻率和振型矢量對其幾何參數的靈敏度公式。 -
This paper bring out design method of inverse eigenvalue problem, which adapts to general structures with linear parameters, namely coefficients of all or partial elastic component and inertial component are treated as design parameters, for given some order natural frequency and corresponding vibrating mode, all of useable designing parameters will be got through solving a linear system of equations, thereby stiffness matrix and mass matrix of actual structure are constructed. this paper also discusses existence condition and unique of results
提出了適用於具有線性參數的一般結構的逆特徵值問題的設計方法，即以系統的全部或部分的彈性元件與慣性元件的系數為設計參數，對于預先給定的若干階固有頻率及相應振型，通過求解一線性方程組即可確定全部實際可行的設計變量，從而構造出實際結構的剛度矩陣和質量矩陣，並論證了解的存在性與唯一性。 -
Theoretical research on the type and mainframe tripled frequency converter : on the basis of building finite element models, dividing grid, application of load in the software of ansys, the dynamic and static performances are calculated, the value of the deformation, the first natural frequency and corresponding mode of the frequency converter are obtained, finally, the dynamic performances of the frequency converter are analyzed
對型三倍頻組件和主機三倍頻組件的理論研究:採用通用ansys軟體對組件進行合理建模，劃分網格，施加載荷，在此基礎上對它們進行了靜態分析和動態分析，得到最大變形量、低階固有頻率和相應的振型，並對組件的動態性能進行了分析。 -
As to the polyreference implemention of the least - squares complex frequency - domain estimator in mathematical separation technique of modes, this thesis builds a right matrix - fraction description model to estimate the system poles. then frequency point stabilization diagram is set up and analyzed to automatically determine natural frequencies, modal damping ratios and modal participation factors. finally mode shapes are identified based on the least squares theory
對于模態數學分離技術的多參考點最小二乘復頻域識別技術，先建立右矩陣分式頻響模型，識別出系統極點，再通過建立和分析頻率點穩態圖，能自動的確定出結構的固有頻率、模態阻尼比和模態參與因子，最後根據最小二乘原理識別出模態振型向量。 -
The contributions to dynamic responses from the modes with low natural frequency are also discussed. the new expression of the mode - acceleration solution is employed to improve evaluations of the wind - induced response for large roof structures in this paper. in this method, the contributions of those high order models were compensated, and the question of choosing proper modes is avoided
本論文從模態加速度法的理論出發，把因為採用模態位移法而捨去的高階模態對響應的貢獻，通過剩餘柔度陣的方法進行補償，從而避免了繁瑣的高階模態分析過程和如何選擇的問題。 -
According to the analytical method of sub structure, we combine the finite elemental model of different parts and process the combining surface parameter to build the finite elemental model of the system. using the ansys software, we carry on the finite element mode analysis to get the natural frequency and shaking type
根據動態設計的子結構分析方法，將上述系統主要部件的有限元模型組合併分析處理結合面參數構成系統的有限元模型。利用ansys有限元分析軟體，對系統進行有限元模態分析，確定系統的各階固有頻率和振型。 -
Keywords : micro - gyroscope, silicon single crystal, three - axis angular - rate sensing, natural frequency and mode shapes
關鍵詞：微型陀螺儀、矽單晶、三軸角速率感測、振動自然頻率與模態。 -
Firstly, frequencies of each mode shape are gained through frequency spectrum analysis of time domain signals of key points. secondly, time domain signals, which correspond to structural mode shapes, are gained through band - pass filter technology. lastly, the corresponding mode shapes of each natural frequency are constructed by using time domain signals, which are processed by band - pass filter technology
該方法的基本思想是先通過對關鍵點處時域信號進行譜分析得到結構各階振型對應的固有頻率，然後通過帶通濾波技術得到結構關鍵點在每階固有頻率下對應的時域信號，最後用濾波后時域信號構建結構在每階固有頻率下對應的振型。 -
These phenomena are roots of the unsteady excitation. ansys was used to solve the structure dynamic equations to obtain the natural frequency of vibration and mode shape of the blade
本文應用工程軟體ansys完成了葉片的振型和自振頻率分析，結合數值計算得出的氣動激擾，進行了葉片的共振分析。 -
In contrast to phase separation ( curve - fitting ) approaches which are largely mathematical, phase resonance testing is a physical technique. when a structure is vibrating in a normal mode, the undamped natural frequency and normal - mode shap of the structure are directly measured. in the classic phase resonance testing, the test data processing is simpler and the results are more accuracy
相對于相位分離法來說，相位共振法是一種比較直觀的物理識別方法，在結構做「純模態」振動時，通過物理測量直接獲得模態參數;試驗數據處理工作量小，且精度一般比單輸入系統高。 -
Sixth, low - order natural frequency has being obtained by the mode analysis experiment of machine tools, the dynamic parameters of combination surface jointed by bolts were identified by the synthesis of fea, optimal algorithm and harmonic response analysis
6 .研究了如何利用由實驗模態分析測得整機的低階固有頻率，通過將有限元分析和優化演算法、諧波響應分析相結合的方法，完成螺栓聯接結合面的參數識別問題。 -
Through contrast, mode data are more sensitive to structure local damage than frequency, but it has the question that the measured accuracy is lower than natural frequency which make results having big deviation
相比之下，振型數據對結構的局部損傷要比頻率敏感的多，但又面臨著測試精度比固有頻率低，容易造成識別結果誤差增大。 -
Taking the andvantages of vibration theory under the backgroud of automobile frame, the finite element computation modules of automobile frame were established in this paper, the natural frequency and mode of vibration of the automobile frame were also calculated, the dynamics characteristics were analyzed, the lead mode which provides reference for remodel design of automobile frame would affect the dynamics characteristics of frame construction
摘要以汽車車架為對象，利用振動理論，建立了汽車車架的有限元計算模型，計算了車架的固有頻率和振型，進行了動態特性分析，從中找出了影響車架結構動力特性的主導模態，為車架改型設計提供了參考。 -
An fem model of rotor - bearing system was set up for a single - span - two - disc test rig to obtain such model parameters as the first and second order natural frequency and vibration mode vectors
摘要以某單跨雙盤模型轉子實驗臺為例，建立了該轉子軸承系統有限元模型，得到轉子系統前兩階固有頻率和振型向量等模態參數。 -
Frequency of the natural hydraulic mode
液壓固有頻率
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