Wind Noise Caused by the Side-Mirror and A-Pillar of a Generic Vehicle Model

2012 ◽  
Author(s):  
Michael Hartmann ◽  
Joerg Ocker ◽  
Timo Lemke ◽  
Alexandra Mutzke ◽  
Volker Schwarz ◽  
...  
Keyword(s):  
Vehicle Model ◽  
Wind Noise

Numerical investigation on the contribution of underbody flow-induced noise on vehicle interior noise

2021 ◽  
pp. 095440702110044
Author(s):  
Yiping Wang ◽  
Mintao Du ◽  
Chuqi Su ◽  
Wenguang Wu
Keyword(s):  
Noise Source ◽  
Interior Noise ◽  
Experimental Result ◽  
Aerodynamic Noise ◽  
Acoustic Response ◽  
Vehicle Model ◽  
Vehicle Interior ◽  
Wind Noise ◽  
Flow Induced Noise ◽  
Computational Fluid Dynamics Cfd

Aerodynamic noise transmitted through greenhouse panels and sealing often dominates the higher frequencies of the interior noise level, whereas the underbody area contributes mainly to low and middle frequencies. A method that unsteady Computational Fluid Dynamics (CFD) for exterior airflow combined with Finite Element Method (FEM) for interior acoustic response was used. To validate the accuracy of this method, the interior wind noise of a simplified vehicle model proposed by Hyundai was computed. The comparison between the computational and experimental result showed that this method had enough accuracy to compute the interior wind noise induced by the exterior flow field. Then, the same method was used to compute the wind noise transmitted through the underbody of a passenger car. The characteristic of the noise source and noise inside the cabin was revealed, and the contribution of underbody flow-induced noise to the interior noise was also investigated. Finally, the influence of the underbody panels thicknesses on the interior wind noise was evaluated.

Anti-Windup Control for an Air-Breathing Hypersonic Vehicle Model

2005 ◽  
Author(s):  
Kevin P. Groves ◽  
Andrea Serrani ◽  
Stephen Yurkovich ◽  
Michael A. Bolender ◽  
David B. Doman
Keyword(s):  
Hypersonic Vehicle ◽  
Vehicle Model ◽  
Air Breathing

scholarly journals Empirical Study of Car Crash Simulation Analysis within the Development Phase

2019 ◽  
Vol 1 (1) ◽  
pp. 2843-2852 ◽  
Author(s):  
Naouress Fatfouta ◽  
Julie Stal-Le Cardinal ◽  
Christine Royer
Keyword(s):  
Empirical Study ◽  
Qualitative Analysis ◽  
Simulation Analysis ◽  
Development Phase ◽  
Vehicle Model ◽  
Crash Simulation ◽  
Automotive Company ◽  
Car Crash ◽  
Industrial Context ◽  
Current Practices

AbstractCar crash simulation analysis is an important phase within the vehicle development. It intends to analyse the crashworthiness of the vehicle model and examine the level of passive security. However, this activity is not trivial because of the considerable collaboration within the project, the large amount of analysed and exchanged data and a high exigency. Consequently, a solution to assist, ease and reduce the time of the process is desired.To study the current practices followed in the car crash simulation analysis an empirical study has been conducted. This study has been applied within the simulation analysis team, in the development phase, within an automotive company. This paper describes a qualitative analysis of the industrial context and diagnoses the dysfunctions in the current practices. This paper also highlights the current challenges encountered in the car crash simulation analysis.

scholarly journals Aerodynamic characteristics of a free-flight scramjet vehicle in shock tunnel

2021 ◽  
Vol 62 (7) ◽  
Author(s):  
Marie Tanno ◽  
Hideyuki Tanno
Keyword(s):  
System Analysis ◽  
Force Measurement ◽  
Prediction Interval ◽  
Angular Acceleration ◽  
Aerodynamic Characteristics ◽  
Measurement Precision ◽  
Shock Tunnel ◽  
Free Flight ◽  
Vehicle Model ◽  
Aerodynamic Test

Abstract A multi-component aerodynamic test for an airframe-engine integrated scramjet vehicle model was conducted in the free-piston shock tunnel HIEST. A free-flight force measurement technique was applied to the scramjet vehicle model named MoDKI. A new method using multiple piezoelectric accelerometers was developed based on overdetermined system analysis. Its unique features are the following: (1) The accelerometer’s mounting location can be more flexible. (2) The measurement precision is predicted to be improved by increasing the number of accelerometers. (3) The angular acceleration can be obtained with single-axis translational accelerometers instead of gyroscopes. (4) Through the averaging process of the multiple accelerometers, model natural vibration is expected to be mitigated. With eight model-onboard single-axis accelerometers, the three-component aerodynamic coefficients (Drag, Lift, and Pitching moment) of MoDKI were successfully measured at the angle of attack from 0.7 to 3.4 degrees under a Mach 8 free-stream test flow condition. A linear regression fitting revealed a 95% prediction interval as the measurement precision of each aerodynamic coefficient. Graphical abstract

Using Spherical Beamforming to Evaluate Wind Noise Paths

2014 ◽  
Author(s):  
Mauricio Massarotti ◽  
Yuri Ribeiro ◽  
Márcio Calçada
Keyword(s):  
Wind Noise

Modelling and Validation of Full Vehicle Model based on a Novel Multibody Formulation

2019 ◽  
Author(s):  
Alberto Parra ◽  
Dionisio Cagigas ◽  
Asier Zubizarreta ◽  
Antonio Joaquin Rodriguez ◽  
Pablo Prieto
Keyword(s):  
Vehicle Model ◽  
Full Vehicle ◽  
Model Based

scholarly journals Between simplicity and accuracy: Effect of adding modeling details on quarter vehicle model accuracy

PLoS ONE ◽  
2017 ◽  
Vol 12 (6) ◽  
pp. e0179485 ◽  
Author(s):  
Ming Foong Soong ◽  
Rahizar Ramli ◽  
Ahmad Saifizul
Keyword(s):  
Vehicle Model ◽  
Model Accuracy
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