武汉理工大学学报（交通科学与工程版）
武漢理工大學學報（交通科學與工程版）
무한리공대학학보（교통과학여공정판）
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY(TRANSPORTATION SCIENCE & ENGINEERING)
2015年
2期
292-296
,共5页
船舶振动%螺旋桨脉动压力%诊断%治理%减振
船舶振動%螺鏇槳脈動壓力%診斷%治理%減振
선박진동%라선장맥동압력%진단%치리%감진
ship vibration%propeller fluctuating pressure%diagnosis%treatment%vibration reduction
针对20000 t近海散货船的有害振动问题，通过实船振动测试、自航与拖模试验、尾部伴流场评估和三维有限元计算，找到主要振源是螺旋桨。振动问题的根源是尾部线型不合理，导致伴流严重不均匀和不定常，引起的螺旋桨叶频和倍叶频激励过大。提出更换螺旋桨、采用阻尼减振等一揽子综合减振措施。更换螺旋桨后，船舶的剧烈振动得到明显改善，满足ISO—6954振动衡准要求。同时在营运船舶有害振动诊断与治理方面取得了宝贵经验，并对船舶设计阶段的防振提出建议。
針對20000 t近海散貨船的有害振動問題，通過實船振動測試、自航與拖模試驗、尾部伴流場評估和三維有限元計算，找到主要振源是螺鏇槳。振動問題的根源是尾部線型不閤理，導緻伴流嚴重不均勻和不定常，引起的螺鏇槳葉頻和倍葉頻激勵過大。提齣更換螺鏇槳、採用阻尼減振等一攬子綜閤減振措施。更換螺鏇槳後，船舶的劇烈振動得到明顯改善，滿足ISO—6954振動衡準要求。同時在營運船舶有害振動診斷與治理方麵取得瞭寶貴經驗，併對船舶設計階段的防振提齣建議。
침대20000 t근해산화선적유해진동문제，통과실선진동측시、자항여타모시험、미부반류장평고화삼유유한원계산，조도주요진원시라선장。진동문제적근원시미부선형불합리，도치반류엄중불균균화불정상，인기적라선장협빈화배협빈격려과대。제출경환라선장、채용조니감진등일람자종합감진조시。경환라선장후，선박적극렬진동득도명현개선，만족ISO—6954진동형준요구。동시재영운선박유해진동진단여치리방면취득료보귀경험，병대선박설계계단적방진제출건의。
A case study on the diagnosis and treatment aiming at harmful vibration of 20 000 ton off‐shore bulk carrier are presented .It is found that vibration source is the propeller by vibration test , self‐propulsion test and towing test ,evaluation of wake fields behind stern and numerical calculation and analysis with 3‐D FEM .The root of the problem is that the stern forms are unreasonable ,which cause wake fields serious non‐uniform and unsteady ,leading to excessive blade frequency and twice blade frequency propeller‐excited force .A set of comprehensive treatment is proposed ,such as rede‐signing propeller ,adopting vibration damping .Ship vibration are great improved by changing the pro‐peller ,w hich meets vibration criterion ISO—6954 .Also it gains beneficial experiences for ship vibra‐tion diagnosis and treatment and some suggestions for anti‐vibration are proposed at the design stage .
