دانلود رایگان مقاله لاتین تحلیل نوسان مودال از سایت الزویر
عنوان فارسی مقاله:
تحلیل ثبات دامنه نوسان مودال و کاربرد آن در جیغ ترمز
عنوان انگلیسی مقاله:
Modal Amplitude Stability Analysis and its application to brake squeal
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
The problem of friction-induced vibration has been the subject of many investigations over recent decades. Overviews on frictioninduced vibration can be found in [1–4]. Several experimental and numerical investigations have been carried out for studying the significant impact of contact surface topography, the local contact pressure distribution or the frictional contact model [5–7]. Some researchers applied uncertainty analyses by conducting Monte Carlo simulations [8] or polynomial chaos expansions [9] for brake squeal propensity estimations. Butlin and Woodhouse [10] applied the 1st-order perturbation method to study the sensibility and uncertainty of friction-induced vibrations. Uncertainty quantification of squeal instability via kriging surrogate model of brake systems was also investigated to estimate the probability of brake squeal [11–13]. The modeling of the variability of brake lining surfaces was carried out by Heussaff et al. [14]. Numerical simulations in the past decade have been also focused on the prediction of unstable vibration modes by investigating the effects of damping [15–17] or multilayer viscoelastic insulators [18] on coalescences patterns. Recently, more research has been aimed at calculating the acoustic radiation of brake squeal using models of simplified brake systems with friction contact [19,20]. Despite all these studies, it is still difficult to predict the occurrence of squeal noise early enough to reduce development costs in the manufacturing process of brake systems. As a result, squeal is still responsible for a large number of nuisances in the field of automotive engineering. The problem of predicting squeal noise and understanding the mechanisms at the origin of squeal are a current challenge for the scientific community and the automotive industry. In general, the numerical strategy for predicting squeal noise can be decomposed into two main parts: the Complex Eigenvalue Analysis (CEA) and the transient and nonlinear analysis. The first concerns the stability analysis around nonlinear static sliding equilibrium points. The classical Complex Eigenvalue Analysis (CEA) is performed on the linearized system to predict the squeal propensity of the brake in a given frequency range. Although this first step is commonly used in industry, it only allows predicting the onset of instability around a given equilibrium point for a nonlinear system. Calculations of the transient and nonlinear vibrations are mostly performed by numerical integrations [21–23]. Recently, Iroz et al. [24] emphasized the potential of an elastic multibody approach predict the amplitudes of the friction-induced vibrations and the contact forces at the disc-pad interfaces. As previously explained in [25], more realistic results can be achieved via the nonlinear analysis if the brake system model is sufficient. Sinou et al. [21,26] pointed out that CEA may lead to under- or over-estimation of unstable modes due to the contributions of the nonlinearities (such as nonlinear contact) and suggested both CEA and time domain analysis need to be considered in brake squeal analysis. Oberst and Lai [23] applied transient analysis to a finite element pad-on-disc brake model. They showed the CEA both over- and under-predicts instability. In [27], they also pointed out the nonlinear character of brake squeal and the potential of using nonlinear statistical analysis tools to analyse brake squeal. They also indicated that brake squeal can be treated as a chaotic phenomenon [28]. While it is standard practice to use the complex eigenvalue analysis to predict unstable vibration modes in an industrial context, the transient nonlinear time domain analysis can become computationally so expensive that it is now considered impractical. Consequently, other methods for estimating approximated nonlinear dynamic steady-state solutions for autonomous systems subjected to single and multiinstabilities have been proposed and developed by Coudeyras et al. [29] to reduce automotive squeal noise. This strategy, known as the Generalized Constrained Harmonic Balance Method (GCHBM), allows predicting both periodic and quasi-periodic solutions and the associated unstable frequencies. Although this method has many advantages and, more specifically, predicts nonlinear signature squeal, we are obliged to admit that this approach requires many computational developments and its use in finite element models remains rare.
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کلمات کلیدی:
Analysis of automotive disc brake squeal considering damping and ... link.springer.com/article/10.1007/s12239-016-0021-1 by C Kim - 2016 - Cited by 1 - Related articles Apr 9, 2016 - Abstract. The squeal noise occurring from the disc brakes of passenger cars has been analyzed by using the complex eigenvalue method ... [PDF]Analysis of brake squeal noise using the finite element ... - Ewp.rpi.edu www.ewp.rpi.edu/hartford/~ernesto/.../TrichesJunior2008-BreakSqualNoise-FEA.pdf by MT Junior - 2008 - Cited by 83 - Related articles Dec 3, 2007 - to high-frequency noise generation when the system is in the end of its lifetime. Application of brake insulators requires a detailed inves-. Noise and Vibration in Friction Systems https://books.google.com/books?isbn=3319113348 Vladimir P. Sergienko, Sergey N. Bukharov - 2014 - Technology & Engineering C.H. Chung, W. Steed, J. Dong, B.S. Kim, Virtual design of brake squeal. ... Chung, A new analysis approach for motorcycle brake squeal noise and its adaptation. ... induced vibrations in moving continua and their application to brake squeal. [PDF]Simulation of Brake Squeal www.bgu.tum.de/fileadmin/w00blj/www/.../dfs/.../Dissertation_Buck_Alexander.pdf This work presents a method to simulate brake squeal and its application to the solution of a high- frequency squeal problem. It consists of a stability analysis of ... [PDF]Abaqus Technology Brief Automotive Brake Squeal Analysis Using a ... https://www.3ds.com/.../Auto-Brake-Squeal-Analysis-Using-a-Complex-Modes-05.pd... Revised: April 2007 . Automotive Brake Squeal Analysis Using a Complex Modes Approach ... In the first analysis step the model is brought into its as- sembled state. ... ter the application of pressure in Step 2 is shown in Fig- ure 6a and Figure ... Analysis on Aircraft Brake Squeal Problem Based on Finite Element ... https://www.hindawi.com/journals/ijae/2017/3982851/ Apr 19, 2017 - However, researchers agree on naming different types of brake noise according to their respective vibration frequency. Most of the researchers ... [PDF]Introduction to Brake Noise & Vibration www.sae.org/events/bce/honeywell-liu.pdf q Squeal y Definition y Contributing factors y Analysis tools q Roughness and Groan y Definition y Contributing ... q Brake squeal is a phenomenon of dynamic instability that occurs at one or more of the natural ... displayed in its FFT spectrum.
