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Reliability analysis of random vibration transmission path systems

机译：随机振动传递路径系统的可靠性分析

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The vibration transmission path systems are generally composed of the vibration source, the vibration transfer path and the vibration receiving structure. The transfer path is the medium of the vibration transmission. Therefore, the uncertainty of path parameters influences the system reliability greatly. In order to avoid the resonance failure, the transmission reliability analysis and the reliability sensitivity analysis are both very important. Based on the reliability theory, the absolute value difference of natural frequency and excitation frequency of random vibration transmission path system was limited and the reliability pattern of the resonance problem was defined in this paper. Applying the generalized second moment technique of vector-valued functions and the stochastic finite element theory, the theoretical analysis method of the transmission reliability and reliability sensitivity was presented. The corresponding vibration transmission path system with uncertain path parameters including mass, stiffness and path position was analyzed theoretically and computed numerically, and then the correlated mathematical expressions were obtained. Thus, in practical project, most of uncertain factors in the vibration systems can be analyzed so that the effective way can be given to avoid resonance failure.
机译：振动传递路径系统通常​​由振动源，振动传递路径和振动接收结构组成。传递路径是振动传递的媒介。因此，路径参数的不确定性极大地影响了系统的可靠性。为了避免共振失败，传输可靠性分析和可靠性灵敏度分析都非常重要。基于可靠性理论，限制了随机振动传递路径系统固有频率和激励频率的绝对值差，定义了共振问题的可靠性模式。运用矢量值函数的广义二阶矩技术和随机有限元理论，提出了传递可靠性和可靠性敏感性的理论分析方法。对相应的具有不确定质量，刚度和路径位置等路径参数的振动传递路径系统进行了理论分析和数值计算，得到了相关的数学表达式。因此，在实际工程中，可以分析振动系统中的大多数不确定因素，从而为避免共振故障提供有效的方法。

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