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Multibody modeling of non-planar ball bearings

机译:非平面球轴承的多体建模

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This work presents the dynamic modeling of ball bearing which uses multibody dynamic formalism. Such formalism allows immediate integration of the model in dynamic simulations of helicopter main gear boxes. Ball bearing is considered non-lubricated in order to predict its behavior in case of lubrication system failure. Rolling contacts are treated with the method proposed by Kalker. This approach is based on polynomial approximation of relative displacement on the contact ellipse. For low computational cost and without any spatial discretization, it gives a good estimation of tangential traction and creep. Also, a regularization of the Kalker linear creep theory is proposed. It is used here to facilitate the global convergence of the Newton iterative process. It is well suited for multibody dynamic simulations which do not need a very fine treatment of rolling contact. A numerical example of a ball bearing under thrust load is presented.
机译:这项工作提出了使用多体动力学形式主义的球轴承动力学建模。这种形式主义允许将模型直接集成到直升机主齿轮箱的动态仿真中。滚珠轴承被认为是非润滑的,以便在润滑系统故障的情况下预测其行为。滚动接触件采用Kalker提出的方法进行处理。该方法基于接触椭圆上相对位移的多项式近似。由于计算成本低,并且没有任何空间离散,因此可以很好地估计切向牵引力和蠕变。此外,提出了卡尔克线性蠕变理论的正则化方法。在这里使用它来促进牛顿迭代过程的全局收敛。它非常适用于不需要非常精细地处理滚动接触的多体动力学仿真。给出了推力载荷下球轴承的数值示例。

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