LMS Virtual.Lab Numerical Engine Acoustics is an efficient tool for predicting the noise radiated throughout a full engine run-up, and for gaining insight into the causes of noise problems. With this comprehensive solution, engineers can simulate and optimize the engine design for acoustic performance.
LMS Virtual.Lab Numerical Engine Acoustics uses excitation forces obtained from dynamic multi-body analyses using Virtual.Lab Motion, from external calculations or from measurements. With this dynamic load data and the structural modes (calculated by standard FE codes), the surface vibrations are evaluated for multi-regime conditions from which the acoustic radiation is predicted.
With LMS Virtual.Lab Numerical Engine Acoustics, engineers can create acoustic meshes very quickly. The distinctive acoustic meshing is based on wrapping an acoustic mesh around the structural mesh. The BEM (Boundary Element Method) acoustic mesh automatically adapts to the analysis frequency. The result is an accurate acoustic mesh generated in hours instead of weeks.
The solution’s solver uses the unique and efficient ATV (Acoustic Transfer Vector) technology, which performs very fast multiple rpm runs and accelerates a rerun of the calculation when analyzing alternative designs. Based on the surface vibrations, the total radiated noise and the sound pressure levels in predefined locations are predicted, reducing the total engine noise radiation process from months to a day.
Based on the results, the engineer can analyze the total radiated power through ISO 3744 meshes and the acoustic sensitivities with regard to the excitation forces, and use a broad set of clear visualization tools to investigate the obtained sound pressure levels.
