COOPERJ E.Extending the logarithmic decrement method to analyse two degree of freedom transient responses[J].Mechanical Systems and Signal Processing,1996,10(4):497-500.Cooper, J.E. Extending the Logarithmic Decrement Method to Analyse Two Degree of Freedom Transient Responses Mechanical s y s t...
由于较近间隔处的放大系数与转子的同步(不平衡)激励无关,因此只能根据阻尼进行近似计算。其次,采用阻尼可以将固有频率与运行速度比的最小值规定为 0.8 至 0.4,从而确保转子不会产生明显的次同步振动。 The logarithmic decrement, δ, is related to the damping factor, ξ, as given in Equation (I.1): 对数...
The use of the logarithmic decrement method in technical solutions is presented by the authors [23], [24]. In their work they analyze the problem of logarithmic decrement optimisation. The results of the research of the measurement of the noise level when idling for the various structures of ...
The logarithmic decrement method calculates the damping ratio of a single degree-of-freedom (SDOF) system by evaluating the logarithmic decay of its free vibration amplitude in the time domain. The key restriction to the use of this method is that the theory is only strictly applicable to SDOF...
The logarithmic decrement ξ = 0.053 was applied to the model as per the work by Huang et al.35. The calculated values according to formula (5) are given as follows: $$\alpha = 1.5644 \cdot 10^{3} ;\quad \beta = 1.7180 \cdot 10^{ - 5}$$ (6) Finally, the nonlinear ...
Tl amalgams, values of the eutectic are perfectly coincident. The logarithmic decrement of the 39.9% at. Tl is located, in the phase diagram, on the right side with respect to the 40% at. Tl.doi:10.1080/00319109608030716MaseraMelania BoscoTaylor & Francis GroupPhysics & Chemistry of Liquids...
Then, the stiffness \(k_1\) was determined from the natural frequency of the recorded free vibrations, and the logarithmic decrement method [29] was adopted to determine the damping coefficient c. The stiffness of the impact plate \(k_2\) was calculated using Eq. 4, and the gap between...
The logarithmic decrement method was applied to determine the modal parameters (Aristizabal et al., 2003), which is the amplitude reduction rate of a free damped vibration, defined as the natural logarithm of the ratio between any two successive amplitudes measured in the same direction (Beards, ...
More precisely, the logarithmic decrement Δ (delta) is in the ski of the present invention calculated to be about 3.95, whereas in the prior art ski the logarithmic decrement Δ (delta) is approximately 2.60. An advantageous effect can also be recognized with respect to the amplitude of the...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook decremeter [′dek·rə‚mēd·ər] (engineering) An instrument for measuring the logarithmic decrement (damping) of a train of waves. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright...