The result shows that acoustic optimization of thin shells of Engine samp may reduce perfectly the radiated noise.
结果表明，对内燃机薄壳结构进行声学优化，可以大大减小噪声辐射。
As a key component of engine, the head of cylinder is a typical complex casting with thin wall.
作为汽车重要部件的发动机气缸盖，是典型的薄壁复杂铸件。
Combustion instability not only affects the stability of the aero-engine work, but also caused the combustion chamber flame tube thin-walled structure acoustic-vibration coupled fatigue.
燃烧不稳定不仅影响航空发动机的工作稳定性，而且还是造成燃烧室火焰筒薄壁结构声振耦合疲劳破坏的重要原因。
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