To manufacturers, properly assessing the acoustic performance of a new vehicle design is of prime importance. And so is fast and accurate FRF testing.
In order to evaluate and quantify a vehicle’s sound package performance, engineers usually measure its acoustic transfer functions. Digitalization is on the rise, but a step of physical verification is still required, be it to ensure that digital models are as accurate as physical prototypes. Testing can come at a price. Time slots for the use of prototype vehicles are scarce and testing can demand expensive lab time. To top it all, the test preparation procedure may end up amounting the largest chunk of the total time required for the process, a preparation time that only increases when setting up tests of electric or hybrid-electric vehicle concepts. The question is out: how can engineers reduce test setup time?
In the Simcenter portfolio, the range of vibration testing equipment and acoustic monopole sources, LMS Qsources, is designed to support fast and easy noise and vibration testing. Setting up the Qsources is as easy as 1,2,3 (and if you’re not convinced, watch our short setup videos here).
For measuring acoustic transfer functions, Simcenter offers a high frequency monopole source that helps acquire these noise transfer functions in a reciprocal way. This source enables transfer function measurements in the frequency range of 200-10000 Hz. For even easier setup of the source, Siemens PLM has developed a new installation support. With this support, setup can easily be done by a single person without requiring any additional tools. And engineers acquire acoustic transfer functions by generating noise at ear location and measuring the response at common operational sources, such as tires and powertrain components.
The new support simplifies source installation and increases testing accuracy
The new installation support not only eases the process of setting up the Qsource, it also increases data accuracy a great deal!
See the difference between traditional support systems and the high frequency monopole source support in the video below.