In order to design lightweight and stiff structure for Formula-SAE racing car body, finite element analyses (FEA) and experimental modal analyses were conducted. Among the major vibration modes in low frequency range, the first torsion mode was identified as the most influential one for both ...
1) formula of vibration frequency 频率公式 2) resonant frequency formula 谐振频率公式 3) plotting position formula 经验频率公式 1. This paper, after analyzing the theoretical bases of threeplotting position formulae, uses statistics test method to choose the best one for P Ⅲ distribution. ...
aThe natural frequency of the 2 node vertical mode of vibration of the hull is calculated by means of empirical formula. It should be noticed that these empirical formula are not based on ERRV-field support vessels, so the calculation is only intended to get an idea of the lowest natural ...
Lattice-Boltzmann simulation of two-dimensional flow over two vibrating side-by-side circular cylinders When the amplitude of vibration is big enough, the vibration locks up the vortex shedding and formation. For each cylinder vibration frequency, there ... Y Xu,Y Liu,Y Xia,... - 《Physical...
Mersenne's fundamental frequency formula is significant because it provides a mathematical basis for understanding the relationship between the physical properties of vibrating mediums and the resulting frequency of the vibration. This formula has been used in various fields, such as music, acoustics, ...
A time-frequency representation (TFR) or time-frequency distribution (TFD) is a two-variable function or distribution that represents a signal in the two-dimensional (t, f) space, where the constant-t cross-section shows the frequency or frequencies present at a specific time and the constant...
The most distinctive characteristic of the NOFRFs is their one-dimensional nature, which can significantly facilitate the analysis of non-linear systems in the frequency domain. For SIMO nonlinear systems, the local TF between the l-th and m-th system outputs is defined as [144]: (43)TlmNL...
This paper proposes a time-frequency domain feature extraction method for multi-source shock signals based on improved VMD and bilateral adaptive Laplace wavelet (BALW) methods. First, the VMD method was improved and the vibration signals were adaptively decomposed to obtain signals of different freque...
Natural Frequencies of Plates and Beams A systematic study of the normal vibration modes of plate-like components may be based on the analysis of their nodal lines, sometimes referred to as the Chladni figures. For a circular plate, the basic constituent nodal lines are circles and diameters (...
vibration, mainly including velocity, displacement, and acceleration, and the three quantities can be interchanged and converted. The peak vibration velocity of particles has been widely used to evaluate the intensity of blasting vibration. Sadovski’s formula considers factors, such as the amount of...