modal stiffness 中文意思是什麼
modal stiffness
解釋
模態剛度-
The relationships of modal damping versus the stiffness of cables, the attachment height of damper and damping constant are obtained. with the optimal structural control method, a new approach to determine the optimal damping constant of viscous damper is presented. the first a few modal damping can be optimized simultaneously under the optimal damping constant of damper, which is more convenient than the existed design method
4 、對拉索-粘性阻尼器系統的動力特性進行了研究，得到了拉索剛度、阻尼器安裝高度及阻尼系數等參數對拉索系統模態阻尼比的影響規律；根據最優控制原理，提出了一種確定阻尼器優化阻尼系數的方法，該方法確定的阻尼系數能保摘要證前幾階模態阻尼比得到整體優化，改進了現有的設計方法。 -
On the bases of carrying out idle operation, cutting and modal experiment of certain numerical controlled lathe, it is determined that weak dynamic stiffness in the spindle component of machine tool is the reason in the respect of structure for causing cutting vibration of machine tools
摘要在對某型數控車床進行空運轉、切削及模態試驗的基礎上，確定了機床主軸部件動剛度薄弱是引起機床切削的結構顫振方面的原因。 -
Taking the bending stiffness, cable sag and cable inclination into consideration, the space vibration control of the cables using the visco - elastic dampers in cable - stayed bridges is investigated by joining the center difference method and the state space strategy. both the maximum modal damping ration and the optimal damper size are obtained, then the practical suggestions are proposed for the design of the dampers. the space nonlinear vibration equations of the cable - damper system are derived, and a new hybrid method for solving the cable - damper system is presented by combing the newmark method and pseudo - force technology
綜合考慮了拉索抗彎剛度、垂度的影響，研究了粘彈性阻尼器對斜拉橋拉索的空間振動控制，聯合中心差分方法及狀態空間法，得出了拉索麵內、外振動各階模態可能達到的最大阻尼比及相應的最優阻尼器系數，並對斜拉橋拉索的阻尼器設計提出了參考建議：考慮拉索抗彎剛度、垂度及幾何非線性，導出了索-阻尼器系統的空間振動非線性方程組，結合newmark方法及偽力（ pseudo - force ）方法，創新地提出了求解非線性方程組的雜交方法，根據拉索-阻尼器系統的阻尼特性，在各種荷載作用下，對索-阻尼器系統的非線性瞬態振動響應進行了研究，從系統響應的角度更加直接地驗證了阻尼器的控制效果。 -
Base on review of existed study and application in suppressing cable vibration in the world, technique of mitigating cable vibration with viscous damper and mr damper has been investigated in this dissertation, and the main contents and progresses in form of summary are as following : 1 the motion differential equations of the cable - damper system are formatted, which take into account these factors, such as the inclined angle, sag, stiffness etc. coupling motion between cable and deck is studied with analytical and numerical method. numerical results show that large amplitude vibration of cable with beat rhythm will occur when exciting frequency of deck equals two times modal frequency of cable
本文在對國內外斜拉索振動控制研究與應用現狀進行綜合評述、分析的基礎上，針對上述問題進行了深入研究，具體的研究內容和取得的成果包括： 1 、建立了斜拉索-阻尼器系統運動方程，對拉索與橋面的耦合振動作了分析和研究，數值結果顯示當橋面激振頻率等於某階拉索模態頻率的兩倍時，很小的初始擾動將引起拉索的大幅振動，並呈現拍振的特徵，與實測的拍振信號一致。 -
The main work of this paper is establishing the 3d model of the whole bus body and implementing the strength analysis, stiffness analysis, modal analysis and road surface spectrum analysis, synthesized considering the geometric properties, physical properties, material properties. the appraisal to the mechanics performance is produced. the suggestion of the structure improvement is put forward based on the analysis result and is adopted by nanjing iveco company
本文主要工作是綜合考慮對象的幾何特性、物理特性、材料特性，進行了整車三維數模的建立;實現了nj6826tmf車的車身強度分析、剛度分析、固有頻率振型分析和路譜分析，在結構的力學性能上給出了相應的評價;根據分析結果，提出結構改進建議，並得到南汽的采納;對該車的超重問題，以輕量化為目標，提出使nj6826tmf輕量化的設計方案，供南汽參考。 -
A methodology was put forward for damage location, and damage simulating as well as numerical calculation of modal analysis was carried out on a truss plane bridge by stiffness discount
摘要推導了基於測試頻率平方變化比的損傷定位方法，利用有限元方法對一管道結構以剛度折減法進行了損傷模擬和模態分析數值計算。 -
Then, the hilbert transform is applied to each modal response to obtain the instantaneous amplitude and phase angle time histories. a linear least - square fit procedure is proposed to identify the natural frequency, damping ratios, physical mass, damping and stiffness matrices from instantaneous amplitude and phase angle for each modal response
然後對各階模態響應進行hilbert變換，得到瞬態幅值和相位角的時間歷程，再運用線性最小均方擬合來識別自然頻率、阻尼比、質量、剛度和阻尼矩陣。 -
Element - stiffness matrix baseline parameters and modal strain energy are employed for the selection of the base modes. an updated - latin hypercube sampling and modal assurance criteria are adapted for efficient generation of the inputs
用單元剛度矩陣基本值和模態應變能來選擇基本模態，用修正的latin超立方采樣技術和模態準入準則來產生網路的輸入數據。 -
Imitate to the launch environment, carry through 15g overloading acceleration analysis to the modal, get the maximum deform and stress of mirror tube structure on static force condition, validate the stiffness and the strength of the structure
模擬發射環境，對模型進行了15g過載分析，得出了靜力作用下結構中的最大變形和最大應力，驗證了系統的剛度和強度。 -
The four parameters ( spring inclination a, the frequency of excitation force w, the amplitude of excitation force f, the spring stiffness k ) are the major factors that take great influences on the vibration plate. in order to analyzing the influences of four parameters, the virtual prototype of vibration plate is built in ansys to get inherent frequency from modal analysis. thorough transient analysis in ansys, the curves of displacement n velocity and acceleration is presented
為了分析這四個參數對系統的影響，首先在ansys中建立振動排秧盤的虛擬模型，採用有限元方法對模型進行了模態分析，得到振動排秧機構的固有頻率；同時對模型進行動力學分析，分析排秧盤的振動量、速度及加速度，並得出相應數據的曲線圖；另外，校核了主要元件彈簧的疲勞強度及使用壽命。 -
And then the dynamic character of magnetic levitation stage are logically evaluated. the results of analysis show that magnetic levitation stage has preferable dynamic stiffness. after modal test for magnetic levitation principle sample machine, through comparing finite element analysis and the result of tes
進行了磁懸浮原理樣機的模態試驗，通過有限元分析和試驗結果比較，證明了本文所建立的磁懸浮定位平臺有限元模型是合理的，提出的評價方法和分析結果是正確的。 -
As a part of the project aided by nature science national fund, 《 analysis of soil - foundation - structure dynamic interaction 》 ( no. 50278033 ), some issues about test research and simulation analysis on soil - box foundation - rc frame structure are discussed in this thesis. these issues include the development in contact modal of dynamic analysis with soil - box foundation interaction, the effect on dynamic interaction with transform in parameter both of superstructure and soil, the research on seismic isolation by changing soil stiffness and introducing research result to the seismic structure design
結合國家自然科學基金課題《地基-基礎-上部結構相互作用體系動力特性研究》 （ no . 50278033 ） ，本文圍繞土-箱形基礎- rc框架結構動力相互作用這一課題，在前人研究成果的基礎上，對動力分析中的接觸模型作了新的探討，並通過試驗分析和數值計算上作了相應的研究對比;同時研究了上部結構與土的各項動力參數對動力相互作用的實際影響，並且進一步利用上述研究得出的結果，通過數值分析探討了關于採用換土改變地基剛度而起到隔震的效果，將土-動力相互作用研究的成果引入工程抗震設計的實際工作去。 -
The modal analysis result shows that the vertical and horizontal frequencies of dps undeployed are high enough and suffice the dynamic stiffness requested for launching. but the large spread length and light weight effect the low frequency of dbs deployed, so considerations should be taken to the effects of other systems of the satellite. the static analysis result shows that the displacements of the dbs are small under the joint affect of vertical and horizontal loads, and stresses are low, so the stiffness and intensity are good enough
模態分析結果表明伸桿收攏狀態的軸向和橫向頻率都比較高，可滿足發射升空時的動剛度要求；靜力分析結果表明伸桿結構在衛星處于發射段和上升段時，在軸向和橫向過載聯合作用下變形均較小，剛度足夠；其應力水平亦較低，強度儲備較大。 -
Based upon the orthogonal condition and the characteristic equation of the modal analysis theory, updating equations about the mass and stiffness matrices of the structure were constructed at first
對于阻尼結構動力模型修正，可由復模態的正交條件和特徵方程建立修正方程，應用所給的數值演算法求修正量。 -
In this paper, based on the steady cornering model using tire modal parameters directly, a finding is illustrated by both theoretical derivation and computation that the effect of tread stiffness on the prediction accuracy of steady cornering model is larger than that for vertical model
文中以模態參數模型的穩態側偏模型為基礎，從理論推導和實際計算兩方面說明胎面花紋剛度的重要性，其對側偏模型計算結果的影響要大大高於對垂直模型的影響。
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