关键词: 排气歧管；ANSYS；发动机；模态分析

Abstract: The exhaust manifold plays a crucial role in the engine exhaust system. The structural design of the exhaust manifold will affect the exhaust efficiency and service life of the engine. Different structural arrangements and manifold length designs have different impacts on exhaust performance. This article mainly focuses on the structural design of the engine exhaust manifold, and modal analysis is conducted on the designed exhaust manifold. After analysis, it can be concluded that the exhaust manifold is not affected by engine vibration resonance occurs due to factors such as vibration caused by uneven road surfaces, which improves the service life of exhaust manifolds and provides a reference for simulation analysis and research of exhaust manifolds.

Key words: Exhaust manifold; ANSYS; Engine; Modal analysis