波纹管液固混合介质隔振器的联合非线性动力学特性  

Joint Nonlinear Dynamic Characteristics of a Corrugated Pipe Liquid-Solid Mixed Medium Isolator

作　　者：尹士成 陈春 Yin Shicheng;Chen Chun

机构地区：[1]国家管网集团东部原油储运有限公司杭州输油分公司,浙江杭州310000 [2]国家管网集团华东公司,上海200050

出　　处：《石油库与加油站》2023年第4期5-9,M0002,M0003,共7页Oil Depot And Gas Station

摘　　要：为了改善运载工程中低频重载动力机械的隔振性能,研制了一种气一液一固多介质的波纹管式液固混合介质隔振器。该型隔振器具备分段线性一非线性的刚度特性,其共振频率等动力学特性由分段式刚度诱发的非光滑特性及传统连续光滑非线性段共同确定。本文采用平均法求解了隔振系统的幅频特性响应方程,继而推导出脊骨线的解析表达。研究结果表明:若两种非线性的软、硬特性一致,则隔振装置的整体刚度属性则会得到加强;若二者互异,对于位移响应幅值越过刚度转折点情况下(β>1),系统的非线性特征则不再是单调渐硬(峰值频率比大于1)或单调渐软(峰值频率比小于1),而是随着外激励由小到大的变化,系统的频响特性可能呈现出一种渐硬(软)到渐软(硬)的过渡变化情形,这是有别于分段双线性模型的地方。本文研究对隔振装置的动力学特性设计具有指导意义。In order to improve the vibration isolation performance of low-frequency and heavy-duty power machinery in transportation engineering,a corrugated tube type liquid-solid mixed medium vibration isolator with gas-liquid-solid multiple media was developed.This type of vibration isolator has segmented linear-nonlinear stiffness characteristics,and its dynamic characteristics such as resonance frequency are determined by the non smooth characteristics induced by segmented stiffness and the traditional continuous smooth nonlinear segments.This article uses the averaging method to solve the amplitude frequency response equation of the isolation system,and then derives the analytical expression of the spine line.The research results indicate that if the soft and hard characteristics of the two types of nonlinearity are consistent,the overall stiffness attribute of the isolator will be strengthened;if the two are different,for the case where the displacement response amplitude exceeds the stiffness turning point(β>1),the nonlinear characteristics of the system are no longer monotonically hardening(with a peak to frequency ratio greater than 1)or monotonicaliy softening(with a peak to frequency ratio less than 1).However,as the external excitation changes from small to large,the frequency response characteristics of the system may exhibit a transition from gradually hardening(soft)to gradually softening(hard),which is different from piecewise bilinear models.This study has guiding significance for the dynamic characteristics design of vibration isolation devices.

关 键 词：输油管道 波纹管 液固混合介质 隔振器 分段线性-非线性 脊骨线 

分 类 号：TB535.1[理学—物理] TE973[理学—声学]