Hybrid journal (It can contain Open Access articles) ISSN (Print) 1479-1471 - ISSN (Online) 1479-148X Published by Inderscience Publishers[450 journals]
Authors:Qian Zhao Pages: 1 - 12 Abstract: It is already well known how MT equipped driveline torsional modes are distributed and influenced, and that is successfully applied to MT equipped vehicle noise vibration harshness (NVH) problem solving. However, it is still marginal for systematically continuous variable transmission (CVT) equipped driveline torsional modes sensitivity analysis, hence it is very meaningful to dig out the CVT driveline torsional vibration mode distribution and sensitivity to driveline component inertia/torsional stiffness, hence the right driveline component parameters could be pre-defined from the very start of driveline development or tuned during the refine stage. The aim of this paper is to find out CVT equipped driveline torsional vibration mode sensitivity to driveline component inertia/torsional stiffness and rules to tune the driveline torsional vibration modes to mitigate torsional vibration induced NVH issues. Keywords: driveline; torsional vibration; CVT; continuous variable transmission; inertia; torsional stiffness; sensibility study; NVH; noise vibration harshness Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 1 - 12 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112428 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Jun Wei Sam, Hock Khuen Cheow, Jee-Hou Ho, Hoon Kiat Ng, Ai Bao Chai Pages: 13 - 29 Abstract: Whole body vibration degrades passengers' ride comfort which significantly affects their perception towards overall vehicle quality and induces health concerning issues under long term exposure. Motivated by the qualitative perception of whole body vibration experienced by the users during vehicle ride, this paper focuses on the vibration characterisation of a car engine frame and proposes a design and implementation of a tuned vibration absorber (TVA) as the vibration attenuation solution in addressing the vertical vibrations which are most perceived at the idling condition. TVA with frequency intentionally detuned to avoid exciting the 2nd structural resonance throughout the nominal engine idle operating frequency results in a vibration acceleration amplitude reduction of 30.3% at the 2nd order. The result shows that TVA is effective in attenuating tonal vibration at a particular troublesome frequency such as the 2nd order tonal vibration commonly experienced by conventional inline 4-cylinder engines. Keywords: vibration analysis; vibration attenuation; TVA; tuned vibration absorber; inertia sensor; numerical simulation; MATLAB; resonance; car engine; short-time Fourier transform Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 13 - 29 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112429 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Kaaïs Khoualdia, Elias Hadjadj Aoul, Tarek Khoualdia Pages: 30 - 45 Abstract: Gears and bearings are some of the most important machine components in the industrial world and detection of their faults has become a major trend. In the present article, in order to bring a reliable methodology for monitoring and diagnosis of rotating machinery failures, a test rig is implemented. However, to diagnose gears and bearings combined faults, a monitoring system based on neural network model (NNM), is proposed. To train and test the NNM, the principal high frequency indicators, determined with the collected time domain vibration data, and codes of defects are used respectively as input and output data. A comparison of two learning algorithms, optimised by the Taguchi method, was done to determine the best NNM. Therefore, the proposed method is effective to study other various industrial cases. Keywords: gear and bearing combined defects; fault vibration analysis; ANN; artificial neural network; design of experiment; Taguchi method Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 30 - 45 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112430 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Faisal O. Mahroogi, S. Narayan Pages: 46 - 57 Abstract: The secondary motion of the piston skirt is a key contributor to noise, vibration and harshness (NVH) emissions from an internal combustion engine. Previous works have focused on various mathematical models of piston secondary motion. In the presented work an overview of piston secondary motion is presented. The scope of using a novel indirect method to control this motion is discussed which involves use of vibration dampers. The discussed methodology can be used to design an optimised profile of the skirt to control noise and vibrations emitted and hence satisfy customer benchmarks. Keywords: engine acoustics; machine design; noise; vibration; piston secondary motion Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 46 - 57 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112432 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Sushant Parisa Magdum, Samir B. Kumbhar, Karanam Venkata Mangaraju, Venkatesh G. Pages: 58 - 68 Abstract: The reduction in drum brake squeal noise which greatly affects rider comfort as well as surrounding noise level has become a more challenging and trending problem in two-wheeler industries. In this paper, squeal noise is reduced by means of liner modification with different width and depth of the liner slot. Effect of change in liner geometry on squeal noise reduction is studied analytically and verified experimentally. A full nonlinear perturbed modal analysis is used to find the stability of the system. In order to validate the analytical results, experimental tests are carried at a certain slow speed having low brake pedal force. The experimental results show that the drum brake squeal noise is found to be reduced by a significant amount by applying the proposed method. It is found that significant modification in geometry of liner in view of noise reduction is not affecting much the vehicle performance. Keywords: squeal noise; drum brake; full nonlinear perturbed modal analysis; stability; stopping distance; self excited vibrations; liner modifications; vehicle performance; brake lining; frictional force; braking force Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 58 - 68 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112437 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Naveed Ahmed Khatri, Fadly Jashi Darsivan, Waleed F. Faris, Ahmad Faris Ismail Pages: 69 - 84 Abstract: The MacPherson quarter car model was used to determine fatigue life of a suspension ball joint using a non-conventional approach which combined rigid body dynamics with finite element (FE) analysis. In this research, a quarter car model was subjected to International Standards Organization (ISO) random road profile with a pothole and a speed bump in order to obtain the ride quality and the reaction forces occurring at the ball joint. After classifying three ride qualities, another simulation was conducted on this model to study the stress distributions, in which the ball joint and its socket were treated as flexible bodies. Finally, based on the results of the FE analysis, fatigue life of the joint was measured for each ride quality. Based on the findings, it was concluded that a good ride quality has an adverse effect on the fatigue life of the ball joint component. ANSYS Workbench and CATIA V5 were used for modelling and simulation. Keywords: quarter car; suspension ball joint; fatigue life; ride quality; reaction forces; FEA; finite element analysis; ANSYS Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 69 - 84 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112438 Issue No:Vol. 16, No. 1/2 (2021)
Authors:Naveed Ahmed Khatri, Fadly Jashi Darsivan, Waleed F. Faris, Ahmad Faris Ismail Pages: 85 - 99 Abstract: This paper is related to passenger ride comfort improvement using an active quarter car system. The selected control strategies include PID based super twisting control (PID-STC) and PID based variable gain super twisting control (PID-VGSTC) for reducing the passenger body vibration response. ISO 8608: 2016 standard is used for random road profile generation while ISO 2631-1 standard guidelines are used for ride comfort comparison. The ride comfort performance of passenger body is evaluated and compared using simulation results taking acceleration and displacement response. The ride comfort improvement results shown by active suspension with PID-VGSTC controller were highest compared to other control strategies. Keywords: quarter car model; passenger ride comfort; PID-VGSTC control; ISO 8608: 2016 standard; ISO 2631-1 standard Citation: International Journal of Vehicle Noise and Vibration, Vol. 16, No. 1/2 (2020) pp. 85 - 99 PubDate: 2021-01-15T23:20:50-05:00 DOI: 10.1504/IJVNV.2020.112439 Issue No:Vol. 16, No. 1/2 (2021)
Hybrid journal (It can contain Open Access articles)
[450 journals]
