damping element 中文意思是什麼
damping element
解釋
衰減元件-
On the basis of the hamilton ' s principle, the element mass matrix, stiffness matrix, and damping matrix caused by coriolis force of the finite method for the conveying fluid tubes were educed in the paper
本文用哈密頓變分式推導輸送流體管道的有限元法分析單元質量矩陣、剛度矩陣和科里奧利力引起的阻尼矩陣。 -
In addition, active constrained layer damping ( acld ) has attracted scholar ' s interests because it has the advantages of passive control and active control. the mechanism of vibration control of acld and the models of how to deal with the viscid - electric material are introduced. the finite element model of acld with ghm model is established in this paper
此外，主動層阻尼結構（ acld ）由於兼有被動控制和主動控制兩者之優點也引起了國內外學者的興趣，本文給出了主動層阻尼結構（約束層採用壓電材料）抑振的工作機理，介紹了處理粘彈性層（ vem ）的幾種模型，並採用ghm模型建立了主動層阻尼結構的有限元模型。 -
Based on the analysis of the dynamic behavior of nanning bridge by means of spatial finite element models, the nonlinear dynamic time history method is used to conduct the sensitivity analysis of the parameters of viscous dampers ( damping constant c and damping exponent ? ) of the bridge and the laws of influence of the parameters on the seismic response thereof have been obtained
摘要在來用空間有限元模型對南寧大橋動力特性分析的基礎上，採用非線性動力時程分析方法，對南寧大橋粘滯阻尼器參數（阻尼常數c 、阻尼指數? ）進行敏感性分析，得出粘滯阻尼器參數對南寧大橋地震響應的影響規律。 -
A test has been carried out on three typical bridges sectional models of flutter derivatives to find the general rules with the change of flutter derivatives of the bridges sectional model. and it has been discovered that this change depend on the torsional damping, an element closely relating to the h * 2 and a * 2 4
通過對三種典型斷面顫振導數的測試，考查了各顫振導數隨斷面形狀的變化趨勢，說明了最主要的變化體現在與扭轉阻尼有關的h _ 2和a _ 2項。 -
The voltage ir on core adopts semienclosed insert model. the current element adopts two - stage compensation to have wide load property. the whole plasticenclosed voltage coil. can withstand instantaneous large voltage impulse. the double jewels bearing or the magnetic - propelled bearing can ensure long lifetime. the bipolar aluminium nickel cobalt damping magnet steels have high coercivity, stable magmetic property. the electric function is in accordance with iec521 international standard
：電壓鐵芯採用半封閉插入式，電流元件採用二級補償使表計具有寬的負載特性。全塑封的電壓線圈能稱說瞬時大電壓沖擊。雙寶石軸承或磁推動軸承確保表計長壽命。 -
To investigating the damping effect under other types of ground motion, this paper constituted a three dimensional finite element model, in which the flange is simplified as an elastic joint and the dampers are as bar elements
考慮到斷路器結構體系可能產生的扭轉效應，本文建立了三維的有限元計算模型。模型中，瓷柱之間的連接法蘭採用較為成熟的彈性連接模型，鉛合金減震器簡化為塑性桿單元。 -
Using the simulation method coupling of multi - body and finite element, the simulation model of frontal impact, side impact and car - pedestrian impact of a certain type of vehicle is established by madymo software, and the comparative analysis of impacting performance of the vehicle fitting with or without this equipment is made out. the simulation results show that the vehicle fitting with this equipment has better damping and energy absorption performance. combines with frontal bumper air bag, not only the injury to the occupants and pedestrians in crash accident can be decreased further, but also the damage to the vehicle can be decreased
3 .採用多剛體與有限元耦合的模擬計算方法，利用madymo軟體建立了汽車正碰、側碰及與行人碰撞的模擬模型，對有無該裝置時車輛的碰撞性能進行了比較與分析，結果表明安裝有該裝置時車輛具有更好的緩沖與吸能特性;結合前保險杠安全氣囊技術，不僅可以進一步減少碰撞事故對乘員及行人的傷害，而且可以減少碰撞事故對車輛本身的損壞。 -
Based on the theory of stochastic finite element, the structural parameters of frame - shear structure including stiffness and mass and damping are simulated to be stochastic variables. by solving recurrence equation of stochastic finite element, the duration curve of mean value and standard deviation of seismic response can be obtained for every floor of frame - shear structure. an analysis is thus given to the effects of independent variation and simultaneous variation of structural parameters on the seismic dynamic response of frame - shear structure. as shown by the results, with regard to frame - shear structure, the effect of variation of strucural parameters on the change of mean value are chiefly the increase of standard deviation of response. variation of stiffness will cause the response of frame - shear structure to variate greatly ; variation of mass shows less effect ; and variation of damping shows insignificant effect. the effects of simultaneous variation of various structral parametres on seismic response are only slightly greater than the effect of stiffness variation alone
以隨機有限元理論為基礎，將框剪結構的剛度、質量、阻尼等結構參數為隨機變量.通過求解隨機有限元的遞推方程，得到框剪結構各層的地震動力響應均值和標準差歷時曲線.分析結構參數單獨變異，以及同時變異對框剪結構地震響應的影響.研究結果表明，對框剪結構而言，結構參數的變異對響應的均值變化影響都不大，主要是增大響應的標準差.剛度的變異性將引起框剪結構的響應發生大幅度變異，質量的變異性影響稍小，阻尼的變異性影響不顯著.結構各參數的同時變異，對框剪結構地震響應的影響，僅比剛度單獨變異的影響稍大 -
( 2 ) based on the wave equation in the acoustic fluid space and the theory of thin - wall structure, the non - symmetrical coupled structure - acoustic dynamic equation without damping is studied. the non - symmetric system of the finite element model for coupled structure - acoustic response is solved by the conjugate subspace iteration method
由聲空間波動方程和薄板理論出發，對聲場?結構耦合系統的模態分析提出了有限元數值方法，採用共扼子空間迭代法對非對稱特徵方程進行處理，採用靜凝聚法消除質量矩陣的奇異性。 -
Numerical stability of explicit finite element schemes for dynamic system with rayleigh damping
瑞利阻尼介質有限元離散模型動力分析的數值穩定性 -
Hamilton ' s principle are used to obtain equations of motion, which are discretized using finite element method. the frequency dependent damping of viscoelastic layer is modeled using the golla - hughes - mctavish ( ghm ) method and the system is analyzed in the time domain. ghm increases the size of the original system by adding fictitious dissipation coordinates that account for the frequency dependent damping
本文採用ghm模型描述粘彈性阻尼材料的本構關系，根據哈密頓原理分別對附加主動約束阻尼層結構（ acld ）和主被動阻尼分離結構（ acupcld和acopcld ，其中acupcld結構是將壓電作動層貼于粘彈阻尼層的下面， acopcld結構是將被動約束層和壓電作動層分別貼于梁的上下表面）的梁結構建立了有限元模型，進而得到系統控制狀態方程。 -
In this thesis, by means of the lagrange function, the finite element dynamic equations of the beam element are deduced. then all the element dynamic equations are assembled into the system dynamic equation through using the kineto - elastodynamics theory. the dissipation force derived from joint damping is applied as excitation force of the linkage system
本文的主要內容如下：以平面彈性四連桿機構為研究對象，運用ked （ kineto - elastodynamics ）方法推導出了連桿機構的系統動力學方程；在此基礎上，將運動副阻尼等效為粘性阻尼，導出了包含運動副等效粘性阻尼系數的系統動力學方程。 -
Through caculation example, the factors that will influece the results of seismic soil response including element meshing, intergration step, damping, boundary were studied and the regularity was generalized. in the third part, the pile - soil - superstructure model was constructed and solved
通過算例考察了影響土體地震反應的單元網格劃分、積分時間步長、阻尼取值、邊界等因素，並對土體地震反應的規律性現象做了總結。 -
( 3 ) introducing the proportional damping, the finite element formula of structural - acoustic coupled system lined with sound absorbing materials is obtained. mode - superposition technique for modal frequency response analysis of coupled structure - acoustic systems is also used to deal with the sensitivities of the eigenvalues and eigenvectors of coupled systems for the purpose of reducing cavity interior noise in theory
討論了阻尼降噪問題，建立了有阻尼聲振耦合系統的有限元模型，採用振型疊加法，將系統位移轉換到以固有振型為基向量，進行結構壁面有吸聲材料的聲振耦合系統響應的有限元分析與靈敏度分析，推導了比例阻尼條件的靈敏度計算公式。 -
For the purpose of determining the basic problems such as the computed field and the mesh sizes in the finite element method, the paper first deals with the problems of a semi - infinite soil domain with radiation damping and material damping through the transient response of a single pile, which are used in the finite element method
本文首先利用單樁的瞬態響應來考察有限元計算中處理半無限土體的輻射阻尼和材料阻尼問題，以便確定有限元計算區域大小，網格尺寸等基本問題。 -
In this thesis, the internal force and transfiguration of the double reticulated dome under different load combination are studied ; the linear and nonlinear analysis are separately performed ; compare the difference between space girder element and space truss element ; at last analyze the dynamical response under seismic action. the horizontal seismic response of double layer oblate lattice shell is analyzed by using step - by - step integration procedure. the effect of some parameters such as exterior load, different support conditions and damping ratio on the dynamic internal forces and dynamic properties is studied
本文旨在研究雙層球狀網殼結構在各種載荷組合下的內力和變形，分別進行了線性和非線性靜力分析；進行了空間梁單元和空間桿單元兩種計算模型的比較；最後進行了在地震荷載作用下的動力反應分析，動力分析中用子空間迭代法得出了這類空間結構的動力特性，用時程法中的振型疊加法分析了結構在水平地震作用下的動態響應規律。 -
The performance characteristics of hydraulic structures are affected by many external factors. the estimate of their real operating states require the evaluation of many parameters such as the elastic modulus, the damping ratio, the friction coefficient, etc, which are extremely difficult to determine with traditional calculation methods or model test. a solution to overcome the difficulty could to be the combination of mathematical model and inverse finite element analysis based on the observed data
由於水工建築物具有體積大，外界作用因素復雜等特點，採用常規的理論分析和模型試驗方法對其進行計算復核以及安全評價時，往往由於未知因素過多，導致研究結果精度和可信度不理想，因此，利用原型監測資料建立正、反分析模型，以掌握其實際運行狀態和變化規律的方法已在水利工程等諸多領域得到深入發展和廣泛應用。 -
It is shown that vibration suppression efficiency of these kind of treatments depend much more on the viscoelastic layer thickness, material properties and the piezoelectric layer thickness. secondly, a linear quadratic regulator and output feedback are used to actively control vibration. it is shown that placing the active element on the opposite side of pcld or underneath pcld is capable of vibration suppression with lower control effort and more inherent damping
定義了主被動混合阻尼結構控制性能指標：被動抑振性能指標、主動抑振性能指標、控制能量指標和控制力性能指標；然後，基於狀態反饋最優控制律，根據定義的控制性能指標分析粘彈性阻尼層厚度、粘彈性阻尼材料參數、壓電作動層厚度對主被動混合阻尼結構振動控制性能的影響，得到了一些有價值的結論。 -
Dd862 and dd862a single phase electic meter are in duction meter. it is used in calculating 50hz single - phase ac active electrical energy. it is compaosed of electromagnetic element. moving disc, bearing, damping magnet steel, counter and regulator and regulator equipment. the meter has high precision, high over - load, long lifetime and so on features
： dd862型和dd862a型單相電度表是感應式儀表，用於計量器頻率為50hz的單相交流有功電能。它主要由電磁元件轉動圓盤軸承阻尼磁鋼計度器和調整裝置等組成，本表具有高精度高過載長壽命等特點。 -
In this pattern a new kind of infinite boundary element is developed to reduce wave reflection on the boundary. by this method, a simple and convenient numerical way is worked out and dissipation of the pore press, damping can be taken into account. it can not only solve the problem of material nonlinearity, but also be suitable for the problem of large deformation
考慮到反射波在計算區域內經多次反射、透射和散射對計算結果可能產生較大的影響，在上述飽和砂土有限元模型的基礎上，建立了一種新的動力無限元計算模型，該模型能滿足工程計算的要求。
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