关键词: 重卡高位引气管；宽频带消声；亥姆霍兹谐振腔；特定频率降噪；传递损失；结构 优化

Abstract: With the tightening of commercial vehicle noise regulations, low-frequency noise control in the intake system is one of the measures to improve overall noise, vibration, harshness (NVH) performance. This research addresses the challenge of achieving efficient noise reduction across a wide frequency range in heavy-duty truck intake systems due to spatial constraints and flow resistance limitations in traditional muffler designs through forward engineering. For a specific heavy-duty truck intake system, an innovative integrated high-position air intake tube structure is proposed. By designing internal ribs to create a three-channel cross-sectional transition structure and integrating Helmholtz resonators, the method utilizes acoustic impedance abrupt changes and phase interference theory to achieve broadband noise reduction and targeted frequency attenuation. Simulation analysis and experimental verification demonstrate significant noise control effects in the intake system, with this research providing practical guidance for engineering applications.

Key words: heavy-duty truck high-position air intake pipe; broadband noise attenuation; Helmholtz resonance chamber; specific frequency noise reduction; transmission loss; structural optimization