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本文阐述了涡轮增压涡器轮叶片在脉冲运行情况下由于不对称进气而产生激发作用的方法。激发作用可以用福里埃(Fourier)法分解成谐波分量。如果以振幅高的谐波去激发叶片的自振频率时,破碎损坏就会出现。由各种例子可以使人们看到通过改变柴油机上的排气管的位置或者改交排气管接连于涡轮增压器上的进气口的次序,但不改变柴油机发火次序等方法,激发振幅是怎样下降的这一事实。本文还阐述了计算叶片根部交变弯曲应力大小的近似方法。
This paper describes a method of generating excitation by turbocharged vortex wheel blades under asymmetrical air in pulse operation. Excitation can be decomposed into harmonic components by the Fourier method. If high amplitude harmonics to excite the natural frequency of leaves, broken damage will occur. Various examples can make people see by changing the position of the exhaust pipe on the diesel engine or change the order of the exhaust pipe connected to the intake port on the turbocharger, but does not change the firing order of the diesel engine and the like, to stimulate the amplitude How to drop is the fact that. This paper also elaborates the approximate method of calculating the alternating bending stress at the blade root.