检索结果-南通市图书馆

Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2022年第4期17卷 273-284页

作者： Pengpeng LIAO Yucai ZHANG Guoyan ZHOU Xiancheng ZHANG Wenchun JIANG Shantung TU Key Laboratory of Pressurized System and Safety MOESchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266555China

The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics by using finite element *** effects of the manifold wall thickness and creep properties of brazing filler metal on the operating life of the recuperator are *** show that the crack initiates from the brazing filler metal located on the outer surface of the manifold with the wall thickness of 2 mm and propagates throughout the whole region of the brazing filler metal when the creep time reaches 34900 *** creep life of the recuperator meets the requirement of 40000 h continuous operation when the wall thickness increases to 3.5 mm,but its total weight increases by 15%.Decreasing the minimum creep strain rate with the enhancement of the creep strength of the brazing filler metal presents an obvious effect on the creep life of the *** the same stress level,the creep rupture time of the recuperator is enhanced by 13 times if the mismatch between the minimum creep rate of the filler and base metal is reduced by 20%.

关键词： creep life assessment brazed joint continuum damage mechanics aeroengine recuperator

Experimental Research on the Wearability, Corrosion Resistance, and life assessment of an Aluminum Alloy Bridge Deck

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2010年第5期15卷 566-573页

作者：李吉勤班慧勇石永久王元清张振学 China State Construction Engineering Corporation Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education Department of Civil Engineering Tsinghua University Tianjin Urban Construction Design Institute

High-performing wearability and corrosion resistance are required for an exposed aluminum alloy bridge deck,but existing experimental research remains *** this paper,feasible test methods are proposed based on an experimental study on the wearability and corrosion resistance of the aluminum alloy bridge deck of the Bengbu Bridge in Tianjin,*** line friction test of standard specimens was adopted,and the aluminum alloy bridge deck＇s wearability was *** electrochemical test was conducted to measure the corrosion rate and morphology characteristics of specimens that were corroded in various solutions that simulated the atmospheric *** test results show that the wearability and corrosion resistance of the aluminum alloy bridge deck are sufficient and met the project＇s *** test methods proposed have practical significance for future engineering research,and the test results are useful for other engineering applications of aluminum alloys.

关键词： aluminum alloy bridge deck wearability corrosion resistance test method life assessment

APPLICATION OF THE UNIFIED STATISTICAL MATERIAL DATABASE FOR DESIGN AND life/RISK assessment OF HIGH TEMPERATURE COMPONENTS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2004年第4期17卷 338-344页

作者： K.Fujiyama T.Fujiwara Y.Nakatani K.Saito A.Sakuma Y.Akikuni S.Hayashi S.Matsumoto Power and Industrial Systems R&D Center Industrial and Power Systems & Services Company Toshiba Corporation Tsurumi-Ku Yokohama 230-0045 JapanThermal and Hydro Power Division Industrial and Power Systems & Services Company Toshiba Corporation Minato-Ku Tokyo 105-8001 JapanPower and Industrial Systems R&D Center Industrial and Power Systems & Services Company Toshiba Corporation Tsurumi-Ku Yokohama 230-0045 JapanKeihin Product Operations Industrial and Power Systems & Services Company Toshiba CorporationTsurumi-Ku Yokohama 230-0045 JapanKeihin Product Operations Industrial and Power Systems & Services Company Toshiba CorporationTsurumi-Ku Yokohama 230-0045 JapanThermal and Hydro Power Division Industrial and Power Systems & Services Company Toshiba Corporation Minato-Ku Tokyo 105-8001 JapanThermal and Hydro Power Division Industrial and Power Systems & Services Company Toshiba Corporation Minato-Ku Tokyo 105-8001 JapanThermal and Hydro Power Division Industrial and Power Systems & Services Company Toshiba Corporation Minato-Ku Tokyo 105-8001 Japan

Statistical manipulation of material data was conducted for probabilistic life assessment or risk-based design and maintenance for high temperature components of power plants. To obtain the statistical distribution of material properties, dominant parameters affecting material properties are introduced into normalization of statistical variables. Those parameters are hardness, chemical composition, characteristic micro structural features and so on. Creep and fatigue properties are expressed by normalized parameters and the unified statistical distributions are obtained. These probability distribution functions show good coincidence statistically with the field database of steam turbine components. It was concluded that the unified statistical baseline approach is useful for the risk management of components in power plants.

关键词： statistical analysis material property steam turbine life assessment risk

Turbine blade temperature calculation and life estimation-a sensitivity analysis

在线全文

学校读者我要写书评

暂无评论

Propulsion and Power Research 2013年第2期2卷 148-161页

作者： Majid Rezazadeh Reyhani Mohammad Alizadeh Alireza Fathi Hiwa Khaledid Amirkabir University of Technology(Tehran Polytechnic) Tehran15875-4413Iran School of Mechanical Engineering College of EngineeringUniversity of TehranTehran4563-11155Iran K.N.T University Tehran19697-64499lran Sharif Universiry of Teclmology Tehran11365-11155Iran

The overall operating cost of the modern gas turbines is greatly influenced by thedurability of hot section components operating at high *** turbine operatingconditions,some defects may occur which can decrease hot section *** the present paper,methods used for calculating blade temperature and life are demonstrated and *** methods,a set of sensitivity analyses on the parameters affecting temperature and life ofa high pressure,high temperature turbine first stage blade is carried *** are:(1)blade coating thickness,(2)coolant inlet pressure and temperature(asa result of secondary air system),and(3)gas turbine load *** show thatincreasing thermal bamier coating thickness by 3 times,leads to rise in the blade life by *** addition,considering inlet cooling temperature and pressure,deviation in temperaturehas greater effect on blade *** of the interesting points that can be realized from theresults is that 300 hours operation at 70%load can be equal to one hour operation atbase load.

关键词： Conjugate heat transfer life assessment Sensitivity analysis Gas turbine Blade

On-Line life Monitoring Technique for Tube Bundles of Boiler High-Temperature Heating Surface

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electricity 2005年第1期16卷 12-16页

作者： YangDong WangZhongyuan ShanghaiElectricPowerTest＆ResearchInstitute

High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and economic operation of boiler. An on-line life monitoring model of high-temperature heating surface was set up according to the well-known L-M formula of the creep damages. The tube wall metal temperature and working stress was measured by on-line monitoring, and with this model, the real-time calculation of the life expenditure of the heating surface tube bundles were realized. Based on the technique the on-line life monitoring and management system of high-temperature heating surface was developed for a 300 MW utility boiler. An effective device was thus suggested for the implementation of the safe operation and the condition-based maintenance of utility boilers.

关键词： utility boiler high-temperature heating surface tube wall metal temperature creep life assessment on-line monitoring