The current automotive development cycle is becoming shorter and shorter,
therefore research is needed to improve the efficiency of wind noise transient
calculation. This article summarizes 14 internal and external factors that
affect the efficiency and accuracy of transient analysis of wind noise, and uses
the ULH algorithm to design DOE for these 14 factors. A total of 200 efficiency
improvement schemes are generated, and transient analysis is conducted on each
of the 200 schemes. The simulation results and calculation time of wind noise
inside the vehicle are statistically analyzed. And aerodynamic acoustic wind
tunnel tests were conducted to verify this, with the optimization objectives of
simulation values approaching 86.1 AI% (experimental values) and shortened
calculation time. NSGA-II algorithm was used to optimize and obtain five sets of
efficiency combination schemes that meet the requirements. Develop five
appearance feature schemes for areas such as A-pillar and rearview mirror, and
apply five sets of efficiency schemes that meet the requirements to analyze the
contribution of appearance schemes. At the same time, conduct wind tunnel
acoustic cabin oil sludge model tests to obtain the experimental contribution of
each appearance scheme, and compare and analyze it with simulation values to
obtain an efficiency improvement scheme that simultaneously meets the
requirements of high simulation accuracy, correct contribution trend, and
effective reduction of calculation time for wind noise inside the vehicle.
Finally, the simulation deviation of wind noise inside the car was achieved to
be ≤1 AI%, with good spectral trend consistency, correct contribution trend of
morphology scheme, and a 30+% increase in calculation efficiency, achieving the
expected goals, shortening the transient calculation time, saving costs, and
providing a foundation for the development of short cycle wind noise and the
construction of wind noise transient database, which has certain practical
significance.