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damping coefficient     
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  阻尼系数
     The calculating formula of equivalent damping coefficient of k1-k6 model is introduced according to the difference of damping torque coefficients between c1-c12 model and Phillips-Heffron k1-k6 model.
     根据c1-c12模型与Phillips-Heffronk1-k6模型下阻尼力矩系数之差,给出了k1-k6模型等效阻尼系数算式。
短句来源
     The analystic results on the scheme proposed in this paper show that the loop-gain, opened-ollp, closed-ollp and error transformer functions are unrelated with the ratio N of division frequency, and the natural frequency, damping coefficient and the instantaneous phase of VCOalso unrelated with N.
     分析结果表明环路增益、开环、闭环和误差传递函数与分频比N无关,环路自然频率、阻尼系数和VCO瞬时相位也与N无关,且实验结果表明这种方案中跳频时间与跳频步长无关,其跳频时间比现有方法改善一个数量级。
短句来源
     The author of this paper considers that a softer suspension spring (the natural frequency of front suspension-9.6 rad/s, and the rear suspension-10 rad/s) and a larger relative damping coefficient φ (front suspension-0.3, rear suspension-0.29)should be adopted for the present model GQ640 travel bus.
     作者认为:现有GQ640大客车应采用较软的悬架弹簧(前悬架偏频取9.6rad/s,后悬架偏频取10rad/s)和较大的相对阻尼系数ψ(前悬架取0.3.后悬架取0.29).
短句来源
     EXPERIMENTAL STUDY ON VISCOUS DAMPING COEFFICIENT
     粘性阻尼系数的实验研究
短句来源
     Using K-K relation, the data of reflection spectra of heavily-doped N-GaAs and N-InP are processed in the range of 50~2750cm~(-1) with 170SX model FT-IR instrument. The frequency of plasma ω_p, the damping coefficient γ, the free carrier concentration n, the mobility μ and the resistivity ρ are obtained.
     基于K-K关系对高掺杂Ⅲ-Ⅴ族化合物半导体N-GaAs和N-InP的反射谱用170SX型FT-IR仪器在50~27500cm~(-1)范围进行了数据处理,求出等离子体频率ω_p、阻尼系数γ、载流子浓度n、迁移率μ、电阻率ρ等重要的电学参数。
短句来源
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  衰减系数
     Furthermore, the damping coefficient of laminated composite is enhanced with the increasing of thickness of fiber/resin layer. The vibration damping mechanism is analyzed.
     研究了不同纤维/树脂层厚度时叠层复合材料的阻尼性能,发现随中间层厚度的增加,叠层复合材料的振动衰减系数增加,并分析其振动衰减机制。
短句来源
     It finds that the damping coefficient is directly proportional to not only wave frequency, but the filling fraction of bigger damping material.
     讨论了不同填充比下固有频率对应的衰减系数关系曲线,得出了衰减系数随着大阻尼材料填充比的增大而增大。
短句来源
     By means of damping coefficient and wavenumber of damped longidinal wave, it were exploited that surface dilational modulus, surface dilational elasticity, surface dilational viscosity, static dilational elasticity, phase angle, which are changed as the function of concentration of C 12 E 8 and frequency.
     利用毛细波 -纵向波的波数和衰减系数探索了非离子表面活性剂溶液的表面膨胀模量、表面膨胀弹性、表面膨胀粘度、静态膨胀弹性、表面粘度相角与浓度和表面变形频率的关系。
短句来源
     By introducing new design parameters such as control move damping coefficient and state feedback weighting fact, the poles of the closed loop predictive control systems can be assigned arbitrarily.
     通过引入控制作用衰减系数及状态反馈加权系数 ,状态反馈预测控制系统的极点可任意配置。
短句来源
  阻尼参数
     Based on the theories of semi-active suspension design and second-order optimal control, through the study on the relationships between optimal control force, performance index, system vibration acceleration power spectral density and optimal suspension damping coefficient, a new algorithm is proposed to determine the optimal damping coefficient with a stochastic and road input and taking the acceleration power spectral density function as the objective. A design example for a mini-car is also given.
     本文以半主动悬架与二阶最优控制理论为基础,通过被动悬架阻尼的主动力表示,结合对最优控制力的分解以及最优评价指标、振动加速度功率谱密度函数与系统振动阻尼之间关系的研究,建立了多自由度汽车振动系统在随机输入下以振动加速度功率谱密度函数极小为目标的悬架最优减振器阻尼参数设计的方法,并给出了7自由度汽车振动系统最优减振器阻尼设计实例。
短句来源
     The inverse problem of parameter identification was transformed into a nonlinear optimization problem. An approach to solving inverse problems was presented for the identification of the damping coefficient in the dynamic system using genetic algorithm.
     将动力系统阻尼参数识别反问题转化为非线性优化问题处理,提出了基于遗传算法的动力系统阻尼参数识别方法。
短句来源
  “damping coefficient”译为未确定词的双语例句
     The parameters of various ejection SM were as follows: damping coefficient of SM of AS was 0.46±0.13, IHSS 0.47±0.29, PPD 0.21±0.04 and residual 0.47±0.11, 0.75±0.56 and 0.28±0.07 accordingly.
     AS所致SM的D为0.46±0.13,IHSS为0.47±0.29,PPD为0.21±0.04; σ~2依次为0.47±0.11,0.75±0.36,0.28±0.07;
短句来源
     Application of Fuzzy Control on Damping Coefficient in Vehicle Semi-active Suspension
     阻尼模糊控制在车辆半主动悬架中的应用
短句来源
     Based on the first order approximation theory of the ordinary differential equations and Hpf bifurcation theory, the influence of the connection stiffness and damping coefficient between cars on the Hpf bifurcation speed of the trainset, i.e. the linear critical speed, is studied; the bifurcated limit cycles of the train system is also investigated.
     基于常微分方程的一次近似理论和H pf分叉理论,分析了车辆之间连接刚度和阻尼对列车系统蛇行运动的H pf分叉速度即临界速度的影响,研究了列车系统的极限环振动。
短句来源
     (3)for flexible structures, increasing the supplemental damping coefficient decreases the relative displacement but increase absolute acceleration, while a variable damper can reduce both the relative displacement and absolute acceleration;
     (3)对于柔性结构,增大附加阻尼在降低结构的最大相对位移响应的同时,却增加了结构最大绝对加速度响应,而采用半主动控制能够同时降低结构的最大相对位移和绝对加速度响应,半主动控制效果明显;
短句来源
     In the theoretical calculation, the slow oscillation damping coefficient of tanker was obtained by a test in irregular waves where the mooring system is substituted by a spring system with the similar stiffness.
     理论计算涉及二阶慢荡阻尼,为此进行了模型在规则波上的衰减试验,系泊形式由弹簧系统代替锚泊系统. 频域计算中的二阶慢荡阻尼参考弹簧系统在不规则波下试验所得的阻尼值.
短句来源
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  damping coefficient
Based on a 1/4 vehicle linear suspension model, the optimum damping coefficient is worked out and the parameters of the damping valve are determined with the equivalent linearization method.
      
It is shown that dustiness causes an increase of the drag of slender models and, conversely, a decrease of the drag and damping coefficient of the longitudinal moment of blunt models.
      
Examples are given of the determination of the "viscous" added mass and the damping coefficient for some bodies and cavities.
      
Using asymptotic methods, the average characteristics determining the damping coefficient and the frequency shift of the oscillations of the vibrator are obtained with allowance for the effect of the capillary waves radiated by the vibrator.
      
The agreement between the calculated and measured data forms the basis for the numerical investigation of the blunt-cone damping coefficient over a wide range of freestream Mach (M∞=4-20) and Reynolds (ReL=106-108) numbers.
      
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This paper develops a theory of hydro-elasticity for the vibration problems of the sluice gates in hydraulic structures. Based upon vibration data obtained from prototype measurements, simplifications of the gate structure are first made in the analysis, i. e. , the gate is treated as a two-dimensional rigid plate with m elastic supports, and theoretical solutions arc then obtained. In the explanation of the interaction between gate and water during vibration, the author introduces the various terms “apparent...

This paper develops a theory of hydro-elasticity for the vibration problems of the sluice gates in hydraulic structures. Based upon vibration data obtained from prototype measurements, simplifications of the gate structure are first made in the analysis, i. e. , the gate is treated as a two-dimensional rigid plate with m elastic supports, and theoretical solutions arc then obtained. In the explanation of the interaction between gate and water during vibration, the author introduces the various terms “apparent mass”, “apparent product of inertia”, “apparent moment of inertia”, “apparent damping coefficient”, and“apparent elastic con-stant”, which originally appear in the analysis. Further analysis of the dynamic stability involving both hydrodynamic and elasticproperties of the vibration system indicates that the intense vibration which occurs in the prototype structure is of the flutter nature, and this explains the reason why the intense vibration suddenly vanishes as soon as the opening of gate is over the critical range. The paper also gives the conditions of the dynamic stability in terms of the structural and the hydraulic properties of the system, such as gate opening, water head, and velocity of flow. Subsequent suggestions are made for the design of the light-weight gate structures as to the reasonable distribution of mass and stiffness and the method of changing the velocity along the upstream surface of the gate to eliminate flutter.

本文用流体弹性力学的方法,研究水工建筑物的閘門振动問題。以某些原型观測資料作为依据,对閘門振动系統作了适当的簡化,研究了閘下出流情况下系統的振动特性。文中闡明了閘下出流对閘门振动系統自振特性的影响,給出了影响閘門自振特性方面的一些重要参数的表示式。文中最后对閘下出流系統的振动稳定性进行了分析。分析的結果有助于說明实际工程中某些輕型閘門具有强烈的振动区的現象是属于“顫振”性貭的。同时还給出了系統振动的稳定条件及其相应的临界条件,包括門体結构、閘門开度、作用水头以及閘下流速等各項影响因素。說明当这些因素組合不当时,閘門发生“顫振”的可能性是存在的,因而在設計輕型閘門时应予注意。最后本文探討了克服与避免“颤振”的措施。

This paper describes a mothod of Oombining theoretical Calculation baaed on the finite element with mechanical impedance testing [techniques.]Using this method we have determined [dynamic bending elastic modulus E for helicopter fiberglass tail rotor and the variation of modulus K with the frequency and temperature. These data are indispensable original parameters in helicopter tail rotor designs at present. This paper also describes a mothod of estimating modal damping coefficient 77 by using the acceleration...

This paper describes a mothod of Oombining theoretical Calculation baaed on the finite element with mechanical impedance testing [techniques.]Using this method we have determined [dynamic bending elastic modulus E for helicopter fiberglass tail rotor and the variation of modulus K with the frequency and temperature. These data are indispensable original parameters in helicopter tail rotor designs at present. This paper also describes a mothod of estimating modal damping coefficient 77 by using the acceleration mobility spectrogram measured.

本文介绍了利用有限元的理论计算与机械阻抗测试技术相结合的方法,确定直升机玻璃钢尾桨的动态弯曲弹性模量E及E随频率和温度的变化关系。这些数据是目前直升机尾桨设计必不可少的原始参数。还介绍了利用测量得到的加速度导纳谱图确定模态阻尼系数η的方法。

Home of the performance of the vibration-type liquid gyrecope, such as th vibration of liquid colum, the measurment of damping coefficient and the power supply is discussed, The signal produced from the ship's navigation system has been analysed.

本文讨论了振动式液体陀螺外性能,如液柱的超声振动、阻尼系数测定以及功率;分析了这种陀螺在船舶导航系统中的信号特性.

 
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