阻尼諧動 的英文怎麼說
中文拼音 [zǔníxiédòng]
阻尼諧動
英文
damped harmonic motion-
Damped harmonic motion
阻尼諧動Based on the geophone vibration formula, this paper presents the affective factors to the seismic data from high resolution geophone arrays and its main property specifications, such as natural frequency, damping coefficient, sensitivity, harmonic distortion, and alias
為此,從檢波器的振動方程出發,對高解析度地震檢波器性能指標(如自頻率、阻尼系數、靈敏度、諧波失真、假頻等)以及檢波器組合的連接方式對地震資料品質的影響進行了分析。After analysis of the parameters of the devices, a conclusion is achieved that we can directly use the parameters of the dampers instead of devices to design the buildings in the common situation. then a one - freedom modal is used to compare the differences of performance between these two dampers under harmonic load. finally, three buildings, which are installed with viscoelastic dampers, viscous dampers and no dampers respectively, are analyzed using finite element method, time history method and response spectrum method, and the result is the same as that of harmonic analysis
如果支撐剛度較小,應採用本文推倒的公式計算阻尼裝置的性能參數;利用單質點模型進行阻尼結構在簡諧荷載作用下的性能分析,並比較了粘彈性與粘滯阻尼結構在振動控制方面的性能差異;最後利用數值方法分別對未安裝阻尼裝置結構,安裝了粘彈和粘滯阻尼裝置的三種結構進行了反應譜和時程分析,得到了與理論分析一致的結果。There is nearly no research on using active control method to reduce ship structural vibration stirred by slamming. this thesis studied theoretically on active cable and active tuned mass damper which were designed on the base of lqr theory. then the thesis studied concretely on the validity of active cable by an example
本論文對船舶結構波浪砰擊響應的主動控制方法進行了研究,主要對基於線性二次型最優控制原理設計出來的主動纜作動器和主動式調諧阻尼器兩種控制器做了理論原理和作動器構成上的探討,並進一步研究了主動纜作動器運用於船舶因波浪砰擊引起的結構振動控制的有效性。We study the time evolution law of the atomic response in an open - type inversionless lasing system when the probe or driving field is off - resonance, and compare the law with that obtained when the probe and driving fields are resonant. we find that the detuning has considerable effects on the time evolution law : when the probe or driving fields is off - resonance, the dispersive responses for the probe and driving fields are no longer 0 and the two - photon coherence is no longer a pure real ; the variation of the probe detuning can make the time evolution law of the population distributions and the gain ( absorbtion ) of the driving field changing obviously ; with detuning increasing, the time evolution behavior of the gain ( absorbtion ), dispersion of the probe field and the two - photon coherence will gradually diviate from the evolution law of the standard damped oscillator ; with the driving detuning increasing, the oscillating time of the dispersion of the driving field becomes longer, the amplitude and the stationary value increase
研究了探測場或驅動場失諧情況下開放的型無粒子數反轉激光系統中原子響應的時間演化規律,並與探測場和驅動場都共振時的演化規律進行了比較.我們發現失諧對時間演化規律有顯著的影響;當驅動場或探測場失諧時,原子對探測場和驅動場色散的響應不再為零,雙光子相干不再是純實量;探測場失諧的變化將使粒子布居和驅動場增益(吸收)的時間演化規律明顯改變;隨著失諧的增大,探測場增益(吸收) 、色散和雙光子相干隨時間的演化行為逐漸偏離標準阻尼振子的演化規律;驅動場色散驅動場失諧量的增加而振蕩時間變長,振幅和穩定值變大The idea of passive control is to utilize additional facility within a structure to dissipate or absorb a large portion of the seismic energy, which has been applied to practical engineering extensively since its control devices - dampers are convenient and it does not need large energy supply and the structural system identification. now the main devices which have been developed in the passive control may be grouped into the following types : viscous, visco - elastic, metallic and frictional, and tuned mass damper ( tmd ) and tuned liquid damper ( tld )
被動控制通過附加阻尼裝置耗散或吸收大部分的地震動能量以達到減振的目的,由於其控制裝置簡單,不需要外界能源輸入和系統識別,容易在工程上實現並已得到廣泛的應用;目前被應用於結構被動控制的阻尼器主要有:粘滯型、粘彈型、摩擦型、調諧質量阻尼器( tmd )和調諧液體阻尼器( tld ) 。In this paper, nonlinear static analysis methods, structural dynamic time history analyses based on structural state equation in hamilton system, multi - mode control theories of multiple tuned mass dampers, and semi active control laws of " on - off " are investigated
本文分析和研究了結構靜力彈塑性分析方法、基於hamilton體系下結構狀態方程求解結構動力學問題的數值逐步積分方法、多重調諧質量阻尼器( mtmd )的多模態控制理論以及建築結構的半主動控制律。Against the status of large scale ultra low frequency air spring vibration isolation platform, which is low damping and poor performance of low frequency, and after analyzing the existing key damping system, a new type differential electromagnetic damping system ( emds ) is developed in this article in order to reduce the resonance peak of the platform effectively and improve the low frequency performance of the platform
本文針對大型超低頻空氣彈簧隔振平臺阻尼小、低頻隔振性能較差的現狀,在比較多種提供阻尼力的方法后,提出了用電磁力作為隔振平臺的阻尼力,並開發研製了差動式電磁阻尼器系統。該系統可以有效降低隔振平臺的諧振峰值,從而達到了提高隔振平臺低頻性能的目的。Finally, application of adams in the simulation analysis of the electromagnet damping system is based on velocity feedback. the result of the simulation is indicated that : the vibration effect of low frequency and resonance peak is decreased with increment of damping ratio, and the high frequency performance is not affected
最後採用adams對電磁阻尼隔振系統進行了振動模擬分析,模擬結果表明,合理設置阻尼比,能夠有效抑制諧振峰值,大幅度提高低頻隔振效果,並且對隔振平臺諧振頻率和高頻性能影響很小。Finally, the wave equation of the electromagnetic field of this kind damper is derived from the maxwell ' s equation. the magnetic flux density at the boundary is assumed to be harmonic, so the analytical result of the wave equation is solved. when the rotor rotates, eddy currents flowing inside the conducting material field are caused
最後,應用ahrens的電磁軸承簡化模型,從maxwell方程出發推導了應用於本文所述的被動式電磁阻尼器的波動方程,並用傅立葉級數把矩形磁場展開的諧變磁場作為磁場的邊界條件,通過求解波動方程得到磁場的解析解,從而計算了阻尼器對轉子的電磁力和由渦流引起的切向力產生的阻尼器附加功耗。A detailed model of non - linear parametric excitation vibration coupling the stay cable and the girder, in which the static sag as well as the geometric non - linearity are considered, is proposed in this paper. based on several numeric examples investigated by the galerkin method composed with the integration strategy, several kinds of factors effecting stay cable parameter vibration are studied. another parameter vibration model by the axial excitation is presented and the corresponding nonlinear equations are derived
本文創新地提出了斜拉橋拉索-橋面耦合參數振動模型,推導了索-橋耦合非線性參數振動方程組,聯合galerkin法及數值積分方法,對各種特性的拉索進行了數值求解,得出了影響拉索參數振動的各種因素;提出了斜拉索受軸向端激勵參數振動模型,導出了模型的非線性振動方程,使用諧波平衡法得出了產生參數振動需要的最小激勵幅值、共振時瞬態及穩態的振動幅值及索拉力的變化特性,並用數值積分方法對實際斜拉橋拉索進行了計算,分析了拉索阻尼對參數振動的影響。The realization of this scheme not only can improve the working and living condition on the platform but also can prolong its operational life span. this is bond to bring huge economic profit to offshore engineering, so it has a promising future. to validate the effectiveness of this vibration control method experimentally, a real control system is made to control the vibration of an oil platform model under simulated wave loadings and the experiment will be conducted in the next term
根據理論分析結果,本文後面又針對一個近海平臺的實驗模型給出了該模型在模擬波浪載荷作用下的振動控制系統設計方案,並進行了系統設計,用於將來的實驗模型振動控制實驗,以驗證文中所設計變剛度調諧質量阻尼器對由波浪載荷引起的平臺振動的控制效果。The fluctuations of its displacement and momentum at zero - point are also given
方法的可靠性及阻尼諧振子的坐標、動量的零點漲落亦得到討論。A damped harmonic oscillator without a driving force was studied using canonical tramsformation ; an exact wavefunction and energy level for the damped harmonic oscillator has been obtained
摘要對于無外界驅動力且阻力與速度成正比的阻尼諧振子,通過正則變換,得出了阻尼諧振子的嚴格波函數及其相應能級。Research on structural vibration control contains vibration mitigation using tuned liquid damper and mr damper, respectively. the sloshing characteristics of tld are investigated using shallow water wave theory and the effectiveness and feasibility of the tld on platform vibration suppression are investigated
利用淺水波動理論研究了調諧液體阻尼器內液體的振蕩特性,並就調諧液體阻尼器應用於海洋平臺振動控制的有效性和可行性進行了數值模擬研究。In chapter three, the passive vibration control of a smart cantilever beam with piezoelectric shunt damping system is studied theoretically. in this chapter, the mechanical impedance of piezoelectric shunt damping system is analyzed, and the parameters of the rlc piezoelectric shunt circuit are optimized via transfer function of the piezoelectric shunt damped beam in order to optimize the vibration damping effect
研究了利用壓電分流阻尼系統進行壓電智能懸臂梁被動振動控制的方法,分析了壓電分流阻尼系統的機械阻抗,並通過傳遞函數方法對rlc串聯壓電分流諧振電路元件的參數進行了優化,以使壓電分流阻尼系統的阻尼效果達到最優。The other is the resonance of boom system of the truck - mounted concrete pump and the frequency response of displacement and acceleration of testing point. the main results and argumentations of this thesis are listed below in detail. 1. based on the certain boom system model of the truck - mounted concrete pump made in china, three - dimensional model of boom system of the truck - mounted concrete pump is built by using the softwar of pro / engineer
2 .基於剛柔混合柔臂架模型,利用adams的振動模塊,以混凝土流動時的沖擊力為激勵對臂架系統進行了諧響應振動研究,得到臂架振動響應的幅頻曲線,並對結果曲線進行了分析,在此基礎之上,研究了油缸阻尼對臂架末端振動位移和振動加速度的影響。Optimum control design of active tuned mass damper for structures subjected to earthquakes
地震作用下結構主動調諧質量阻尼器最優控制設計分享友人