舰船防共振模糊可靠性分析

Analysis on vibration fuzzy reliability of ships

由于舰船结构的复杂性,以至于在考虑其防共振可靠性时,必须考虑多阶固有频率的问题。另外,由非共振到共振是一个渐变过程,两者之间并不存在明显的界限,存在着模糊不确定性,因此必须结合模糊数学理论来处理。本文基于模糊共振准则,分别建立了单频激励多自由度无阻尼结构和多频激励多自由度无阻尼结构模糊振动可靠性分析的数学模型。通过算例演示了模型的计算结果,并与相关文献结果做比较,验证了理论的正确性。

As a result of the characteristic, the ships are Multi-degree in majority. So in the consider of the resonance guard reliability, must take Multi-degree inhere frequencies. In addition, the process from Non-resonance to resonance is a gradual process. There is fuzzy uncertainty, so must unit fuzzy mathematics. This paper setting up the mathematics model of the vibration fuzzy reliability about the muhi-degree non-damp systems inspirited by single inspiritment and muhi-inspiritment based on fuzzy resonance rule. At the end, an engineering example has made to demonstrate the result of the model, proof the theory and its application through comparing with the traditional method.