Improvement of the vibroacoustic characteristics

Improvement of the vibroacoustic characteristics Vibroacoustic analysis of the nE15LE electric bus in the frequency range from 250 to 10,000Hz. The purpose of the analysis is to identify high frequencies occurring in the structure area and the paths along which they are transferred to the interior of the bus. it is to take into account both the supporting structure and interior finishing materials. As a result, guidelines for reducing the perceived noise level inside the vehicle are to be presented. Input data: - 3d model of the bus supporting structure -list of materials used in the construction of the vehicle -list with data on masses of vehicle components -list and description of components generating vibration and noise Requirements: -using simulation techniques such as: • Statistic Energy Analyzes, • Acoustic noise path analyzes, • Structure noise path analyzes - description of the frequency responses of the model -description of the methodology - creating a database of materials used during analyzes, including poroelastic materials -identification of critical areas - guidelines for acoustic measurements in the possible continuation of works on the project - guidelines on the materials used for soundproofing - modeling of possible structural changes and their transfer in * stp or * x_t format - periodic reporting and meetings / teleconferences at least once every 3 weeks