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equivalent linear damping
相关语句
  等效线性阻尼
     Results demonstrate that the damper axial velocity could be reduced and equivalent linear damping increased through modifications of damper geometric arrangement and reasonable choices of structural parameters.
     通过改进减摆器的安装型式、选择合理的几何参数可以显著降低轴向速度 ,提高等效线性阻尼
短句来源
  等效线性阻尼的
     On Influence of Kinematics to Equivalent Linear Damping of Helicopter Blade Hydraulic Damper
     几何耦合对直升机桨叶液压减摆器等效线性阻尼的影响研究
短句来源
  “equivalent linear damping”译为未确定词的双语例句
     The functions used to describe the nonlinear damping have been analyzed. The experiment results of the damping of helicopters are shown. Based on the relation of describing function and the equivalent linear damping coefficients of nonlinear damping force, an identification method for the identification of parameters of non-linear damping has been proposed.
     本文研究了直升机的非线性阻尼特性,分析了非线性阻尼特性的描述形式,展示了直升机阻尼特性的试验结果,提出了基于阻尼特性的功量图数据或当量粘性阻尼系数数据的非线性阻尼特性参数识别方法,对直八型直升机的非线性阻尼特性进行了实际的识别研究.
短句来源
     In order to investigate the effect of kinematics and parameters of nonlinear hydraulic damper on equivalent linear damping, a analytical model of helicopter rotor damper, accounting for kinematic couplings, is presented in forward flight.
     为研究几何耦合与设计参数对非线性液压减摆器等效阻尼的影响 ,建立了直升机前飞时 ,计入几何耦合的旋翼液压减摆器的分析模型 ,根据桨叶与减摆器之间的关系和减摆器力 -速度曲线 ,导出了桨叶的摆振运动方程。
短句来源
     An equivalent linear damping for ER fluid′s nonlinear damping was made by means of equivalent linearization,and the influence of variable damping of ER fluid on system vibration properties were analysed.
     利用等效线性化的方法分析了电流变流体的等效阻尼、等效刚度及其对系统振动特性的影响。
短句来源
     Then,based on the analysis of the stress characteristics of the simplified mathematical model and on a series of supposed premise such as unsteady pipe flow,using Newton's law and time-domain method of the classical control theory,the paper analyzes the wall shearing stress equation under laminar and turbulent flows and the energy dissipation under turbulent flow condition,and also gives the maximum size of step function input and the equation of equivalent linear damping ratio.
     在简化数学模型受力特性分析和非稳态管流等一系列假定条件的基础之上,利用牛顿定律和经典控制理论中的时域法,分析了层流和紊流状态的管壁切应力公式及紊流状态的能量损耗,并给出阶跃输入下的最大振幅和等价线性阻尼率公式。
短句来源
  相似匹配句对
     the equivalent of E.
     E.
短句来源
     The Equivalent Method and Principle
     等效方法与等效原理
短句来源
     Equivalent Linearization of Nonlinear Forces
     非线性力的等效线性化
短句来源
     Damping Rubber
     阻尼橡胶
短句来源
     DAMPING ALLOYS
     减振合金
短句来源
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  equivalent linear damping
The transmissibility of a nonlinear viscoelastic isolator is compared with that of a linear isolator using an equivalent linear damping coefficient.
      
Results indicate that equivalent linear damping will be significantly reduced if pitch/flap/lag kinematic coupling introduced for notional model and flight conditions.
      
Fourier series based moving block analysis was applied to calculate equivalent linear damping in terms of transient responses of damper axial velocity.
      
On influence of kinematics to equivalent linear damping of helicopter blade hydraulic damper
      
The equivalent linear damping ratio was measured as a function of vibration amplitude and clamping force.
      
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In this paper on the basis of stochastic linearization techniques,an analytical method is presented for the dyramic reliability of a lightly damepd and weakly nonlinear multidegree-of-freedom system excited by stationary Gauss wideband random loads with the help of the mode superposition method.It is proved that under the condition of the stationary Gauss white noise loads the equivalent normalized responses are approximately independent. With this conclusion the joint probabilistic density function of the normalized...

In this paper on the basis of stochastic linearization techniques,an analytical method is presented for the dyramic reliability of a lightly damepd and weakly nonlinear multidegree-of-freedom system excited by stationary Gauss wideband random loads with the help of the mode superposition method.It is proved that under the condition of the stationary Gauss white noise loads the equivalent normalized responses are approximately independent. With this conclusion the joint probabilistic density function of the normalized responses is yielded the formulas are derived for determining the equivalent linear damping and fre= quency.Furthermore,the joint probabilistic density function of the relative displacement and velocity responses of the particles have been yielded. A method is presented for determining the dyramic reliability of the nonlinear multidegree-of-freedom system on the basis of the first passage damage mechanism and "weakest link "model".The ar.alytical expressions of the dyramic reliability of the stationary responses of the nonlinear multidegree-of-freedom system taking the relative displacement quantities of the particles as bounds are obtained.Then the developed method is extended to the dynamic reliability problem in which the loads are stationary Gauss wide-band random processes.Finally, the method presented in the paper is applied to N-degree-of-freedom quasilinear system and the numerical results of a two-degree-of-freedom quasilinear system are compared with those obtained by Monte Carlo simulation.

本文在等价线性化法的基础上提出了一种用振型分解法分析小阻尼、弱非线性多自由度体系受平稳高斯宽频带随机荷载作用的动力可靠性的完整的解析方法。先在平稳高斯白噪声的荷载条件下证明了等价正规反应是近似独立的,并由此求出正规反应的联合概率密度函数,建立了确定等价阻尼和等价固有圆频率的公式;进一步求出体系质点相对位移及其导数的联合概率密度函数后,提出了一种基于首通破坏机制和“最弱链环”(weakest link)模型的非线性多自由度体系的动力可靠性的计算方法,求出了以质点相对位移量为界限的非线性多自由度体系的平稳反应的动力可靠性的解析表达式。其次,把上述方法推广到了荷载是平稳高斯宽频带过程的情况。最后把本文提出的理论应用到了拟线性多自由度体系。对于两个自由度的情况求出了数字结果,并与Monte Carlo模拟结果进行了比较,验证了本文提出的方法的正确性。在结论中还指出了本文的方法用来处理过渡反应时应该注意的一些问题。

In this paper the formula of requisite linear damping for overcoming shimmy is derived according to the point contact theory of wheel shimmy.However damp-ing property of the hydraulic shimmy damper is mostly non-linear. Two methods have been presented in this paper to treat this case. They are tangent method and minimum equivalent linear damping method.Their relation has been found, too. It has been demonstrated by computation that the methods are both effective and reliable.

本文根据机轮摆振的点接触理论,导出了为克服摆振所需线性阻尼的计算公式。然而,液压减摆器的阻尼特性大都是非线性的。为此,本文提出了两种处理方法,即切线法和最小当量线性阻尼法,并找出了它们的关系。计算结果表明这些方法是有效而可靠的。

In this paper, the nonlinear characteristics of damping in both rotor blades and landing gears of helicopter have been investigated. The functions used to describe the nonlinear damping have been analyzed. The experiment results of the damping of helicopters are shown. Based on the relation of describing function and the equivalent linear damping coefficients of nonlinear damping force, an identification method for the identification of parameters of non-linear damping has been proposed....

In this paper, the nonlinear characteristics of damping in both rotor blades and landing gears of helicopter have been investigated. The functions used to describe the nonlinear damping have been analyzed. The experiment results of the damping of helicopters are shown. Based on the relation of describing function and the equivalent linear damping coefficients of nonlinear damping force, an identification method for the identification of parameters of non-linear damping has been proposed. The practical work of the identification has been carried on two kinds of helicopters.

本文研究了直升机的非线性阻尼特性,分析了非线性阻尼特性的描述形式,展示了直升机阻尼特性的试验结果,提出了基于阻尼特性的功量图数据或当量粘性阻尼系数数据的非线性阻尼特性参数识别方法,对直八型直升机的非线性阻尼特性进行了实际的识别研究.

 
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