AUTOMOTIVE

 

ICR's experience in automotive acoustics ranges from conducting experimental studies of noise and vibration transmission pathways to developing theoretical models for forecasting traffic noise. At the same time, ICR develops new test procedures optimizing the current methods of vehicle characterization both in time and money.

 

Working procedure

The realization of high-tech projects in this sector has allowed us to develop our own methodology for measuring noise and vibrations and to propose efficient solutions to the problems of noise and vibrations posed by customers.

Services

Some of the services offered are:
-Advanced transfer path analysis (TPA and ATPA) of noise and vibrations.
-Vibro-acoustic contribution of each element of the passenger compartment to the level received by the driver.
- For the reconstruction of internal noise in the medium to high frequency bands.
-Custom software for vibroacoustic analysis of a problem.
-Quality control.
-Custom design of silencers and acoustic solutions.
-Numerical simulations (FEM, BEM, CFD).

 

Projects

+ Reduction of indoor noise from a hybrid bus. Castrosua.
Reduction of indoor noise from a hybrid bus. Castrosua.
Simultaneous measurement of the vibration levels of the hydraulic steering pump and its supports on the outside of the vehicle, and the sound pressure at various points both inside and outside. From this point on, diagnose the causes of noise transmission from source to receiver and propose the most optimal solutions.
+ Study to reduce the emission of noise in the circulation of a trailer with cargo containers on the road in Sant Boi de Llobregat, Barcelona. Llinás e Hijos S.L.
Study to reduce the emission of noise in the circulation of a trailer with cargo containers on the road in Sant Boi de Llobregat, Barcelona. Llinás e Hijos S.L.
In order to reduce the noise generated during the movement of one of the trailers by transporting cargo containers, the trailer noise is measured by moving at appropriate distances with both full and empty containers. Based on the results, the causes of the problem noise are determined and the correction is designed.
+ Analysis of transmission pathways: airborne and structural contributions of vibro-acoustic sources to noise perceived by the driver and at an external point. AUSA, Automóviles Utilitarios, S.A.
Analysis of transmission pathways: airborne and structural contributions of vibro-acoustic sources to noise perceived by the driver and at an external point. AUSA, Automóviles Utilitarios, S.A.

Assessment of the contributions of the different subsystems of the CH-150 model to the noise received in the driver's position and at an external point, with the objective of determining the modifications necessary to the vehicle in order to reduce the sound pressure level received at these two points. Carrying out measurements with the vehicle stationary according to the TPA methodology to know how much noise comes directly from the holes and what part comes from the vibration of the structure.

+ Characterisation of the engine by means of the mobility method and the source descriptor. Vibration power injected into the bodywork. AUSA, Automóviles Utilitarios S.A.
Characterisation of the engine by means of the mobility method and the source descriptor. Vibration power injected into the bodywork. AUSA, Automóviles Utilitarios S.A.
Determination of the vibration power transmitted from the engine to the vehicle bodywork CH-150 of AUSA, through its different connection points. Evaluation of the power transmitted by the main motor-body connection points using the Mobility and Source Descriptor Method, allowing to find some solution that reduces the current vibration level.
+ Complete vibro-acoustic study in one of the car's gear changes (characterization, numerical modelling and solution design). Ficosa.
Complete vibro-acoustic study in one of the car's gear changes (characterization, numerical modelling and solution design). Ficosa.

Development of a computer application made in Matlab language, so that from the data supplied by the user can make calculations for the characterization of their gear changes and representation of the results obtained. Complete characterization of a gearshift system that allows to establish the necessary modifications to achieve the vibro-acoustic requirements that the client establishes for these mechanisms.

+ Inversion of models to determine the acoustic power of a car's cabin panels in the mid and high frequency range. Ferrari.
 Inversion of models to determine the acoustic power of a car's cabin panels in the mid and high frequency range.. Ferrari.
Measurement of sound pressure at different points and under controlled operating conditions of the Ferrari 456 model. Application of the methodology of Investing models in order to know the noise level of each of the surfaces of the cabin in order to be able to treat it and, at the same time, predict the improvement obtained with the modifications made.