Vibration Fatigue Analysis and Optimization of Liquid-filled Pipelines of Automobile Turbocharger
Takes the parallel liquid-filled pipelines of a certain type of automobile turbocharger as the research object,and adopts a research method combining simulation and experimental verification to study the fatigue failure problem of the liquid-filled pipelines under random vibration.Firstly,the fluid-structure coupling dynamic model of the liquid-filled pipelines is established,and the accuracy of the model is verified by modal test.Secondly,based on the established dynamic model and the S-N curve measured by the pipelines the fatigue life of the liquid-filled pipelines under the random vibration load spectrum is further predicted,and compared with the experimental results.Finally,the fatigue life of the liquid-filled pipelines is improved by optimizing the wave height and the wall thickness of the bellows.The research conclusion shows that the fatigue life of the liquid-filled pipelines increases and then decreases with the increase of the wave height dimension and wall thickness dimension of the bellows.When the bellows wave height and wall thickness are adjusted to 3.5 mm and 0.33 mm,respectively,the optimization effect is obvious,and the expected fatigue life of liquid-filled pipelines is increased from 1.056 x 106 times to 1.80 × 107 times.
liquid-filled pipelines of turbochargerfluid-structure interactionrandom vibrationS-N curvefatigue life
万方数据
维普
