燃气涡轮试验与研究
燃氣渦輪試驗與研究
연기와륜시험여연구
Gas Turbine Experiment and Research
2015年
3期
13-18
,共6页
航空发动机%涡轮盘%可靠性%蠕变累积损伤%蒙特卡洛法%响应面法%应力松弛
航空髮動機%渦輪盤%可靠性%蠕變纍積損傷%矇特卡洛法%響應麵法%應力鬆弛
항공발동궤%와륜반%가고성%연변루적손상%몽특잡락법%향응면법%응력송이
aero-engine%turbine disk%reliability%creep accumulative damage%Monte-Carlo simulation%response surface method%stress relaxation
为评估涡轮盘持久及低周疲劳寿命可靠性，考虑涡轮盘材料及载荷的分散性，采用响应面法与蒙特卡洛法相结合的方法，建立涡轮盘持久寿命可靠性分析模型。对给定中间以上状态工作时间400 h的涡轮盘进行持久寿命可靠度计算，并考察应力松弛效应对涡轮盘持久寿命的影响。在持久寿命可靠性分析的基础上，根据Miner线性累积损伤理论，对考虑蠕变损伤的涡轮盘低周疲劳寿命进行可靠性评估。结果表明，该涡轮盘满足400 h持久寿命、寿命安全系数1.5，及1500周低周疲劳寿命、寿命安全系数2.0的使用要求。
為評估渦輪盤持久及低週疲勞壽命可靠性，攷慮渦輪盤材料及載荷的分散性，採用響應麵法與矇特卡洛法相結閤的方法，建立渦輪盤持久壽命可靠性分析模型。對給定中間以上狀態工作時間400 h的渦輪盤進行持久壽命可靠度計算，併攷察應力鬆弛效應對渦輪盤持久壽命的影響。在持久壽命可靠性分析的基礎上，根據Miner線性纍積損傷理論，對攷慮蠕變損傷的渦輪盤低週疲勞壽命進行可靠性評估。結果錶明，該渦輪盤滿足400 h持久壽命、壽命安全繫數1.5，及1500週低週疲勞壽命、壽命安全繫數2.0的使用要求。
위평고와륜반지구급저주피로수명가고성，고필와륜반재료급재하적분산성，채용향응면법여몽특잡락법상결합적방법，건립와륜반지구수명가고성분석모형。대급정중간이상상태공작시간400 h적와륜반진행지구수명가고도계산，병고찰응력송이효응대와륜반지구수명적영향。재지구수명가고성분석적기출상，근거Miner선성루적손상이론，대고필연변손상적와륜반저주피로수명진행가고성평고。결과표명，해와륜반만족400 h지구수명、수명안전계수1.5，급1500주저주피로수명、수명안전계수2.0적사용요구。
To predict the creep rupture and LCF life reliability of a turbine disk, considering the scatter of turbine disk material parameters and load parameters, using the response surface fitting and Monte-Carlo simulation technology, a creep rupture reliability life analysis model was constructed. The creep rupture probabilistic life of a turbine disk working 400 h was calculated. The influence of stress relaxation on the creep rupture probabilistic life was also analyzed. Based on the evaluated creep rupture reliability life and Miner linear cumulative damage theory, the creep/LCF probabilistic life was finally assessed. It turned out that the turbine disk met the design requirements of creep rupture life 400 h, safety factor 1.5 and LCF life 1 500 cycles, safety factor 2.0.
