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首页> 外文期刊>Journal of Mechanical Science and Technology >Uncertainty analysis of nonlinear systems employing the first-order reliability method
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Uncertainty analysis of nonlinear systems employing the first-order reliability method

机译：一阶可靠性方法对非线性系统的不确定性分析

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摘要

In most mechanical systems, properties of the system elements have uncertainties due to several reasons. For example, mass, stiffness coefficient of a spring, damping coefficient of a damper or friction coefficients have uncertain characteristics. The uncertain characteristics of the elements have a direct effect on the system performance uncertainty. It is very important to estimate the performance uncertainty since the performance uncertainty is directly related to manufacturing yield and consumer satisfaction. Due to this reason, the performance uncertainty should be estimated accurately and considered in the system design. In this paper, performance measures are defined for nonlinear vibration systems and the performance measure uncertainties are estimated employing the first order reliability method (FORM). It was found that the FORM could provide good results in spite of the system nonlinear characteristics. Comparing to the results obtained by Monte Carlo Simulation (MCS), the accuracy of the uncertainty analysis results obtained by the FORM is validated.
机译：在大多数机械系统中，由于多种原因，系统元素的属性具有不确定性。例如，质量，弹簧的刚度系数，阻尼器的阻尼系数或摩擦系数具有不确定的特性。元素的不确定特性直接影响系统性能不确定性。评估性能不确定性非常重要，因为性能不确定性与制造良率和消费者满意度直接相关。由于这个原因，性能不确定性应准确估算并在系统设计中加以考虑。在本文中，定义了非线性振动系统的性能指标，并使用一阶可靠性方法（FORM）估算了性能指标的不确定性。发现尽管系统具有非线性特性，FORM仍可以提供良好的结果。与通过蒙特卡洛模拟（MCS）获得的结果进行比较，验证了通过FORM获得的不确定性分析结果的准确性。

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