重庆理工大学学报（自然科学版）
重慶理工大學學報（自然科學版）
중경리공대학학보（자연과학판）
JOURNAL OF CHONGQING INSTITUTE OF TECHNOLOGY
2014年
9期
25-30
,共6页
风扇叶片%流固耦合%模态分析%疲劳寿命
風扇葉片%流固耦閤%模態分析%疲勞壽命
풍선협편%류고우합%모태분석%피로수명
fan blade%fluid-structure coupling%modal analysis%fatigue life
针对目前弱耦合能否用于计算风扇叶片响应的问题，对某发动机冷却风扇叶片建立有限元模型，采用了强耦合和弱耦合2种计算方式，对风扇叶片进行数值模拟。分析了在标定工况下风扇叶片的结构响应。对比了在2种方法下计算出的风扇叶片的模态频率及振型，并对风扇叶片进行了疲劳分析。结果表明：相比弱耦合，强耦合计算得到的叶片最大位移量高出16．7％，最应力高出17．1％。用2种耦合方法计算出的叶片各阶模态频率及振型结果相差不大。最后对风扇叶片分别进行了疲劳寿命的预测。
針對目前弱耦閤能否用于計算風扇葉片響應的問題，對某髮動機冷卻風扇葉片建立有限元模型，採用瞭彊耦閤和弱耦閤2種計算方式，對風扇葉片進行數值模擬。分析瞭在標定工況下風扇葉片的結構響應。對比瞭在2種方法下計算齣的風扇葉片的模態頻率及振型，併對風扇葉片進行瞭疲勞分析。結果錶明：相比弱耦閤，彊耦閤計算得到的葉片最大位移量高齣16．7％，最應力高齣17．1％。用2種耦閤方法計算齣的葉片各階模態頻率及振型結果相差不大。最後對風扇葉片分彆進行瞭疲勞壽命的預測。
침대목전약우합능부용우계산풍선협편향응적문제，대모발동궤냉각풍선협편건립유한원모형，채용료강우합화약우합2충계산방식，대풍선협편진행수치모의。분석료재표정공황하풍선협편적결구향응。대비료재2충방법하계산출적풍선협편적모태빈솔급진형，병대풍선협편진행료피로분석。결과표명：상비약우합，강우합계산득도적협편최대위이량고출16．7％，최응력고출17．1％。용2충우합방법계산출적협편각계모태빈솔급진형결과상차불대。최후대풍선협편분별진행료피로수명적예측。
Aiming at the problem of whether the weak coupling response can be used to calculate the fan blade,finite element model of cooling fan blade of an engine was established.Two fluid-structure interaction numerical methods including weak coupling and strange coupling were implemented for the numerical simulation of blade and analysis of the structure response of the blade.The modal frequency and vibration mode and fatigue life of the blade obtained by two numerical methods were compared. The results show that the maximum deformation and maximum stress increased less than 20%with the strange coupling compare with the weak one.The two numerical methods were used to analyze the blade modal,but there is little difference between their results.At last a prediction of blade fatigue life was made.
