确定海底管线管跨段模糊固有频率的方法

STUDY ON METHOD OF DETERMINING FUZZY NATURAL FREQUENCY OF SUBMARINE PIPELINE SPAN

根据管跨端点支撑土壤的变形特性 ,提出了研究管跨振动特性的力学模型 ;探讨了端点支撑的弹性系数和阻尼系数的模糊性 .基于模糊推理规则 ,依据海底土壤力学特性参数及其影响因素间的模糊关系 ,提出了确定作为管跨端点支撑土壤的弹性系数和阻尼系数的方法 ,并通过模型实验 ,验证了据此方法计算出的模糊固有频率的正确性 .

This paper presents a model of span vibration according to the deformation character of soil on the seabed.Meanwhile.the fuzziness of the coefficients of elasticity and damping is discussed.A method is established of determining fuzzy natural the frequency of submarine pipeline span, based on the fuzzy reasoning principle.All of the model and method are supported by test.