Substrucured, Meshless and Parametric Modeling of Vibroacoustic Systems

Engineering tools that increase the quality of the environment and life of instruments are very important. For example, the development of space vehicles and space stations requires the prediction of vibration levels to assess the fatigue life of critical components and noise levels to ensure the comfort and functionality levels of crew members. The software product developed as part of the proposed project will enable NASA to effectively evaluate and apply noise and vibration control procedures spanning the entire frequency spectrum. It will also substantially reduce the effort involved in the design of products since the proposed development offers a truly unique and far-advanced modeling capability and unparalleled ease-of-use at mid-frequencies without involving any secondary artificial or derived model variables. The software will also enhance NASA's ability to evaluate the acoustic environment and resulting vibration in the payload bay of launch vehicles, diffuse sound field excitation on payloads during rocket launch, ground qualification, and structural integrity of airframes. Manufacturers of aircraft engines and components will also find the software useful for analysis and design.

The proposed development will also extend and enhance the computational modeling capabilities in many industries such as automotive, naval, heavy equipment and consumer products. Customers often equate quality of a product with its sound and vibration performance. As a result of elevated demand for quieter products from customers together with the increased government regulations, manufactures of products with noise problem in all industries are searching for effective ways to make products with improved noise characteristics. For example, in automotive industry, the increased use of multi-media and telemetric devices demands quieter vehicle interiors and the manufacturers and suppliers of interior products not only need to consider functionality, but also the noise control capability of the products. Consequently, there is increasing demand for tools based on computer simulation that can be used to guide design at the early design stage. Furthermore, the software can be adapted to evaluate and improve radiated noise from engines, exhaust, tires, etc. It can be used to evaluate and improve consumer products such as compressors, air conditioners, hair dryers, vacuum cleaners, and washing machines. More »