Investigation of Vehicle Passenger Compartment Noise Due to Random Acoustic, Vibration, and Turbulent Boundary Layer Excitations

9313838吴在这个项目中，计算机模型的开发用于预测移动车辆车厢内的噪声水平。使用这些模型，工程师能够优化车辆设计方案，并提高车内噪声舒适度。调查提供了一个更好的理解，由于随机声学，振动和湍流边界层激励的声音产生和传输机制所涉及的物理。此外，结果形成了一个有用的输入到车辆面板结构，子结构和接头连接的设计标准的发展，以尽量减少振动和声音传输到乘客舱。结合车辆结构和空气动力学模型，本研究项目的声学模型形成了一个强大的设计工具，用于准确模拟移动车辆内部的声场，并确定在车辆通过噪声辐射和乘客舱内噪声水平中起关键作用的参数。 *** v S t $ $ ( F / 1 倍 Symbol“Helvetica 5新 " H % E 艾薇！ C R：\WW20USER\ABSTRACT.DOT wu 玛丽约翰逊

9313838 Wu In this project, computer models are developed for predicting noise levels inside a moving vehicle passenger compartment. Using these models, engineers are able to optimize vehicle design alternatives, and improve interior noise comfort level. The investigation provide a better understanding of the physics involved in sound generation and transmission mechanisms due to random acoustics, vibrations, and turbulent boundary-layer excitations. In addition, the results form a useful input to the development of design criteria for vehicle panel structures, sub-structures, and joint connections in order to minimize vibration and sound transmission into the passenger compartment. Coupled with vehicle structure and aerodynamic models, the acoustic models from this research project form a powerful design tool for accurately simulating the sound field inside a moving vehicle, and identifying the parameters that play a critical role in both vehicle pass-by noise radiation and noise levels within the passenger compartment. *** v s t $ $ ( F / 1 Times Symbol " Helvetica 5 Courier New " h % E E ! C R:\WW20USER\ABSTRACT.DOT wu maryjohnson maryjohnson