摘要
基于计算流体力学和有限元方法，分析了发动机进气系统声学性能并通过试验验证了模型的有效性。对进气系统传递损失进行模拟，通过空滤和谐振腔的优化设计，有针对性地提高某些频率段的传递损失。空滤的优化使400～900Hz频率内传递损失明显提升，最高达27dB；谐振腔容积和位置的设计使400Hz以内的频率段传递损失提高约3～10dB。较初始状态比，系统总声压级最大降幅12dB，满足了设计目标。优化方案为新车型进气系统的正向设计奠定了基础。
Based on CFD and FEM method, the engine intake system acoustic performance is analyzed and validated by experiment. The intake system transmission loss is simulated, and the trans- mission loss under certain targeted frequency is improved by optimizing the air filter and resonators. The optimization of air filter makes the transmission loss of frequency range from 400 - 900Hz increase obviously with the maximum of 27dB, and the design of resonator volume and position makes transmis- sion loss of frequency less than 400Hz improve by 3 - 10dB. Compared with the initial state, the over-all SPL（ sound pressure level） reduces significantly with the maximum of 12dB, which meets the de- sign target. The optimization scheme lays the foundation for the forward design of a new vehicle air in- take system.
出处
《上海汽车》
2015年第7期24-28,共5页
Shanghai Auto
