Demand Background

Automotive NVH is a comprehensive index to measure the quality of automotive manufacturing. Early detection of NVH problems is critical because structural decisions for car cockpits are made during the initial design phase and are not easily modified later. The acoustic simulation analysis of the car cockpit can provide the basis for optimizing the early design scheme of the car and help enterprises reduce the cost, shorten the development cycle, and improve the sound quality of the car. 

Solution

In order to meet the requirements of a well-known enterprise to develop new energy series cars and improve the sound quality of the car cockpit, IBE developed an acoustic simulation application for calculating the sound field distribution in a closed space based on the cloud simulation platform, which can calculate the acoustic mode of the car cockpit, plot the frequency response curve at any point, and export audio files. This assists engineers in design evaluation, helps enterprises determine the acoustic characteristics of the cockpit in the early stage of design, identifies potential problems as much as possible, and reduces the cost of prototype manufacturing and personnel rework. Meanwhile, it also provides a cloud simulation platform, facilitating collaborative work in different places and improving R&D efficiency.

This solution has the following advantages:

1. With professional acoustic simulation capabilities, such as typical areal sources, point sources, and incident waves, radiation, impedance, and porous sound absorption boundaries, the sound field distribution within the fluid domain can be solved by customizing or importing external stimuli and the real and complex modes can also be calculated.

2. The solution can be performed in the browser instead of the new installed software. Meanwhile, the computing resources and storage space can be flexibly expanded on demand. 

3. Project files can be shared online to work together, without downloading and transferring.

4. Rich and convenient data postprocessing tools support the audio and visualization of simulation results.

Future Applications

With the visualization and audibility of simulation data provided by the acoustic simulation module, car companies can improve cockpit sound quality and provide passengers with a more comfortable riding environment. The software is also applicable to guide the layout of speakers in scenes such as houses and concert halls for good interior acoustic design. In aviation, aerospace, shipbuilding, and other military industries, the software is also applicable to vibration and noise analysis.