Pseudo excitation method
WebAug 19, 2024 · The pseudoexcitation method (PEM) can improve efficiency of random vibration analysis. However, for large-sized structures with wide frequency range of … WebSep 18, 2024 · The power spectrum density of random excitation is used to define a series of non-stationary pseudo excitation in pseudo excitation method and the trigonometric series of random vibration history samples in Monte Carlo method, respectively solved by precise integral method and Newmark-β method through the inter-system iterative …
Pseudo excitation method
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WebMar 18, 2024 · The pseudo excitation method is used to solve the vibration response of aero-engine pipeline system, and the optimization of the hoop layout for aero-engine spatial pipelines under random excitation to reduce random vibration response is studied systematically. Keywords Genetic algorithm Optimization of hoop layout Random excitation WebIn this study, an efficient analysis framework for high-speed train-bridge coupled vibrations under non-stationary winds based on the pseudo excitation method (PEM) has been developed, in which the non-stationary winds were transformed into a series of pseudoharmonic excitation vectors.
WebMethod 514.6 random vibration test. This thesis details the methods and results of both computational and experimental techniques to ensure the design would pass random vibration testing. Background is provided on random vibration theory and the application of various statistical methods to determine a structure's fatigue life. WebAug 18, 2024 · An equivalence technique based on the modal superimposition approach and a pseudo-excitation method has been developed to mimic the acoustic loading into an …
WebMar 1, 2024 · In this paper, the Volterra series and the pseudo-excitation method (PEM) are combined to establish a frequency domain method for the power spectral density (PSD) analysis of random vibration of … WebOct 4, 2024 · The pseudo-excitation method is used to establish the dynamic equations of motion, and the separation iteration method is used to solve the equations, so as to obtain the power spectral density of the wheel-rail interaction forces. The wheel-rail interaction forces are obtained by using a modulation function and the harmonic superposition …
WebSep 7, 2024 · In this work, an existing numerical method, called the pseudo-equivalent deterministic excitation method (PEDE M ), is further developed for the experimental …
WebAug 19, 2024 · The main feature of the pseudoexcitation method is to transform stationary random response analysis into a series of steady-state harmonic response analysis. Taking stationary random vibration with multiple degrees of freedom as an example, this paper elaborates the basic ideas of this method. kickback in real estate definitionWebDec 30, 2015 · Pseudo excitation method (PEM) proposed by Lin et al. has been widely used in linear analysis of random vibration owing to its accuracy and high efficiency. In PEM, the random excitation is transformed into pseudo excitation; then, stochastic equations of motion can be solved using numerical integration. kick back and bowl east hampton ctWebSep 7, 2024 · CsPbI3 quantum dots (QDs) are of great interest in new-generation photovoltaics (PVs) due to their excellent optoelectronic properties. The long and insulative ligands protect their phase stability and enable superior photoluminescence quantum yield, however, limiting charge transportation and extraction in PV devices. In this work, we use … is margin and leverage the sameWebJun 18, 2013 · Moreover, the pseudo excitation method (PEM) is employed to speed up the spectral analysis. For identifying crack parameters based on the constructed Kriging model, a robust stochastic particle swarm optimization (SPSO) algorithm is adopted for enhancing the global searching ability. To improve the accuracy of the surrogate model without … is marginal tax rate based on agiWebOct 14, 2013 · By differentiating the equations of motion of the coupled system, the first- and second-order stationary sensitivity equations can be derived, which are subjected to harmonic pseudo-excitations and have low dofs due to the application of PEM and symplectic mathematical method. is marginal utility the sum of total utilityWebOct 11, 2024 · Pseudo-excitation method is an accurate and efficient random vibration analysis method. The stationary random vibration analysis can be equivalent to the harmonic vibration analysis. The schematic of pseudo excitation can be expressed as the equation (17) S uu = H ( ω) 2 S xx (17a) u = H ( ω) e ω t (17b) u ~ = S xx H ( ω) e i ω t … is marginata toxic to dogsWebOct 19, 2024 · The pseudo-excitation of irregularities can be obtained by adding the pseudo-excitations for all the wheel sets. Based on the fundamental assumption of PEM, the track … kick back in spanish