柴油机排气歧管是增压器安装在柴油机上的直接支撑,其可靠性直接影响增压器甚至柴油机的正常工作,对柴油机的性能起着关键作用。对连接增压器与柴油机的排气歧管进行研究,运用Drilik法对排气歧管进行疲劳计算分析。结果表明:疲劳破坏是其主要的失效形式,增压器振动载荷是造成排气歧管疲劳失效的主要原因,并计算得到了排气歧管的最大疲劳损伤。 Diesel engine exhaust manifold is mounted on the diesel engine direct support, its reliability directly affects the turbocharger and even the normal operation of the diesel engine, diesel engine performance plays a key role. The exhaust manifold connecting supercharger and diesel engine was studied, and the exhaust manifold was calculated by Drilik method. The results show that fatigue failure is the main failure mode. The main cause of fatigue failure of the exhaust manifold is the vibration load of the supercharger. The maximum fatigue damage of the exhaust manifold is calculated.