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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering >An efficient analysis and optimization method for powertrain mounting systems involving interval uncertainty
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An efficient analysis and optimization method for powertrain mounting systems involving interval uncertainty

机译：涉及间隔不确定性的动力总成安装系统的有效分析和优化方法

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摘要

Uncertainty widely exists in the powertrain mounting system of a vehicle. The traditional analysis and optimization methods for powertrain mounting system design are often based on deterministic or random models. In this study, an efficient analysis and optimization method is developed for powertrain mounting system design involving interval uncertainty. In the proposed method, the uncertain parameters of powertrain mounting system are treated as interval variables, and an efficient method called as Chebyshev-Vertex method is developed to fast calculate the lower and upper bounds of the natural frequencies and decoupling ratios of powertrain mounting system. Monte-Carlo method is taken as a reference method to verify the calculation. Then, an optimization model is established based on Chebyshev-Vertex method, in which the interval responses of decoupling ratios are used to build up optimization objective while the interval responses of natural frequencies and decoupling ratios are taken to create optimization constraints. The optimization model of the powertrain mounting system with interval parameters is generally a double-loop nested problem, and it is rather time-consuming on calculation. However, based on Chebyshev-Vertex method, the optimization model can be approximately simplified into a single-loop one and the calculation efficiency is greatly improved. A numerical example is provided to demonstrate the effectiveness of the proposed method on the analysis and optimization design of the powertrain mounting system involving interval uncertainty.
机译：在车辆的动力系安装系统中广泛存在不确定性。用于动力总成安装系统设计的传统分析和优化方法通常基于确定性或随机型号。在本研究中，开发了一种有效的分析和优化方法，用于动力总成安装系统设计涉及间隔不确定性。在该方法中，动力总成安装系统的不确定参数被视为间隔变量，并且开发了一种称为Chebyshev-Vertex方法的有效方法以快速计算动力总成安装系统的自然频率和去耦比的下限和上限。 Monte-Carlo方法是作为验证计算的参考方法。然后，基于Chebyshev-Vertex方法建立优化模型，其中去耦比的间隔响应用于建立优化目标，而采用自然频率和去耦比的间隔响应来创建优化约束。动力系安装系统的优化模型通常是双环嵌套问题，并且在计算时相当耗时。然而，基于Chebyshev-Vertex方法，优化模型可以大致简化为单环，并且可以大大提高计算效率。提供了一个数值示例以证明所提出的方法对涉及间隔不确定性的动力总成安装系统的分析和优化设计的有效性。

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