船舶力学
船舶力學
선박역학
JOURNAL OF SHIP MECHANICS
2015年
8期
975-981
,共7页
张春辉%汪玉%杜俭业%温肇东
張春輝%汪玉%杜儉業%溫肇東
장춘휘%왕옥%두검업%온조동
幂律流体%冲击隔离%隔冲特性
冪律流體%遲擊隔離%隔遲特性
멱률류체%충격격리%격충특성
power-law fluid%shock isolation%buffer characteristics
基于幂律流体阻尼特性,建立了单自由度冲击隔离系统数学模型,分析了幂律流体的分段阻尼力特性与隔冲耗能特性,并讨论了速度相关指数、固有频率、冲击载荷幅值等因素对系统隔冲性能的影响。研究结果表明:当激励信号产生的流体相对速度较小时,剪切稀化流体的隔冲性能优于线性阻尼和剪切稠化流体阻尼,流体相对速度较大时,剪切稠化流体的隔冲性能优于线性阻尼和剪切稀化流体。幂律流体的参数影响分析为幂律流体阻尼器的设计和实际应用提供了一定的参考。
基于冪律流體阻尼特性,建立瞭單自由度遲擊隔離繫統數學模型,分析瞭冪律流體的分段阻尼力特性與隔遲耗能特性,併討論瞭速度相關指數、固有頻率、遲擊載荷幅值等因素對繫統隔遲性能的影響。研究結果錶明:噹激勵信號產生的流體相對速度較小時,剪切稀化流體的隔遲性能優于線性阻尼和剪切稠化流體阻尼,流體相對速度較大時,剪切稠化流體的隔遲性能優于線性阻尼和剪切稀化流體。冪律流體的參數影響分析為冪律流體阻尼器的設計和實際應用提供瞭一定的參攷。
기우멱률류체조니특성,건립료단자유도충격격리계통수학모형,분석료멱률류체적분단조니력특성여격충모능특성,병토론료속도상관지수、고유빈솔、충격재하폭치등인소대계통격충성능적영향。연구결과표명:당격려신호산생적류체상대속도교소시,전절희화류체적격충성능우우선성조니화전절주화류체조니,류체상대속도교대시,전절주화류체적격충성능우우선성조니화전절희화류체。멱률류체적삼수영향분석위멱률류체조니기적설계화실제응용제공료일정적삼고。
Based on damping characteristics of power-law fluid, a mathematical model of single-freedom shock isolation system was established. Segmental damping force characteristics and absorption character-istics of power-law fluid were analyzed. Besides, the numerical analysis related to the effects of these pa-rameters (velocity index, natural frequency and shock excitation amplitude) on shock isolation performance was carried out. The results show that the impact resistance performance of shear thinning fluid shock iso-lation system is better than the linear damping and shear thickening fluid shock system at the lesser rela-tive velocity. The impact resistance performance of shear thickening fluid shock isolation system is better than the linear damping and shear thinning fluid shock system at the biggist relative velocity. The paramet-ric influence analyses of the power-law fluid provide a feasible theoretical basis for the design and appli-cation of the power-law fluid damper.