Analysis and Design Issues for Modern Aerospace Vehicles最新文献

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Forced Response Analysis of Gas Turbine Rotor Blades Using CFD-Based Aeroelastic Tools 基于cfd气动弹性工具的燃气轮机转子叶片强迫响应分析
Analysis and Design Issues for Modern Aerospace Vehicles Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0739
M. Kruse, Jong-Shang Liu, Yves G. Marenghi, C. D. Eick
{"title":"Forced Response Analysis of Gas Turbine Rotor Blades Using CFD-Based Aeroelastic Tools","authors":"M. Kruse, Jong-Shang Liu, Yves G. Marenghi, C. D. Eick","doi":"10.1115/imece1997-0739","DOIUrl":"https://doi.org/10.1115/imece1997-0739","url":null,"abstract":"\u0000 Integration of computational fluid dynamics (CFD) and structural dynamics codes is critical to the advancement of turbomachinery designs. This paper describes the successful integration of the CFD code UNSFLO with the structural dynamics code ANSYS® for a case study rotor. To evaluate the software combination, AlliedSignal Engines (AE) intiated a program to compare experimental observations from a set of high-pressure turbine tests to analytical predictions from UNSFLO and ANSYS®. The rotor under investigation exhibited significant blade vibratory response due to pressure wakes from upstream stator vanes. Experimental data, collected on two stator-rotor configurations, indicates dramatic strain reductions when the axial space between the stator and rotor blades is increased. Forced response analyses, which compare favorably to the experimental data, indicate a 90 percent reduction in vibratory strain levels.","PeriodicalId":403237,"journal":{"name":"Analysis and Design Issues for Modern Aerospace Vehicles","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122102108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Probabilistic Mesomechanics for High Cycle Fatigue Life Prediction 高周疲劳寿命预测的概率细观力学
Analysis and Design Issues for Modern Aerospace Vehicles Pub Date : 1997-11-16 DOI: 10.1115/1.482789
R. Tryon, T. Cruse
{"title":"Probabilistic Mesomechanics for High Cycle Fatigue Life Prediction","authors":"R. Tryon, T. Cruse","doi":"10.1115/1.482789","DOIUrl":"https://doi.org/10.1115/1.482789","url":null,"abstract":"\u0000 This paper presents an analytical modeling approach to characterize and understand high cycle fatigue life in gas turbine alloys. It is recognized that the design of structures subjected to fatigue cannot be based on average material behavior but that designs must consider −3σ or some other appropriate extreme value (tail of the distribution) loading and/or material properties. Thus, a life prediction capability useful in a design application must address the scatter inherent in material response to fatigue loading. Further, the life prediction capability should identify the key micromechanical variables that are critical in the tail of the scatter in the materials durability distribution. The proposed method addresses the scatter in fatigue by investigating the microstructural variables responsible for the scatter and developing analytical and semi-analytical models to quantitatively relate the variables to the response. The model is general and considers the entire range of damage accumulation sequences; from crack nucleation of the initially unflawed structure to final fast fracture.","PeriodicalId":403237,"journal":{"name":"Analysis and Design Issues for Modern Aerospace Vehicles","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123660885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Thermoelastic Analysis of Laminated Composite Plates and Shells Based on High-Order Theory 基于高阶理论的层合复合材料板壳热弹性分析
Analysis and Design Issues for Modern Aerospace Vehicles Pub Date : 1997-11-16 DOI: 10.1115/imece1997-0722
V. Verijenko, T. R. Tauchert, S. Adali, M. Scott, C. Shaikh
{"title":"Thermoelastic Analysis of Laminated Composite Plates and Shells Based on High-Order Theory","authors":"V. Verijenko, T. R. Tauchert, S. Adali, M. Scott, C. Shaikh","doi":"10.1115/imece1997-0722","DOIUrl":"https://doi.org/10.1115/imece1997-0722","url":null,"abstract":"\u0000 Due to increased use of laminated composite plates and shells as a primary structural elements the requirements of their analysis and design are constantly moving to a significantly higher level. The understanding of behaviour of these structures under different loading conditions including such as thermal, static, dynamic and their combinations becomes of paramount importance for the safe design. In the present paper a derivation of a new higher-order theory for the analysis of thermoelastic composite plates and shells is presented. The theory based on kinematic hypothesis which were derived on the basis of iterative technique, and it takes into account transverse shear deformations. It is shown that the results obtained on the basis of this theory are accurate and that the theory allows to improve understanding of the response of laminated composites under thermal and static loading.","PeriodicalId":403237,"journal":{"name":"Analysis and Design Issues for Modern Aerospace Vehicles","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124975337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strength Distribution and Size Effects for the Fracture of Fibrous Composite Materials 纤维复合材料断裂的强度分布及尺寸效应
Analysis and Design Issues for Modern Aerospace Vehicles Pub Date : 1997-10-01 DOI: 10.1115/imece1997-0706
S. L. Phoenix, I. Beyerlein
{"title":"Strength Distribution and Size Effects for the Fracture of Fibrous Composite Materials","authors":"S. L. Phoenix, I. Beyerlein","doi":"10.1115/imece1997-0706","DOIUrl":"https://doi.org/10.1115/imece1997-0706","url":null,"abstract":"\u0000 Random network models have recently been developed in the physics literature to explain the strength and size effect in heterogeneous materials. Applications have included the breakdown of random fuse networks, dielectric breakdown and brittle fracture. Unfortunately, conventional scaling approaches of statistical mechanics have yielded incorrect predictions, and new approaches have been proposed which build on field enhancement occurring near the tips of critical, random clusters together with the statistical theory of extremes. New distributions and size scalings for strength have been proposed and supported through Monte Carlo simulation. Here we consider an idealized, one-dimensional model for the failure of such networks where elements of constant strength may be initially present or absent at random. Our idealized rule for local stress redistribution near breaks reflects features we find in a discrete mechanics model that has limiting forms consistent with continuum theories for cracks. We obtain rigorous asymptotic results for the strength distribution and size effect with constants and exponents that are known. The validity of various analytical approximations in the literature is then discussed.","PeriodicalId":403237,"journal":{"name":"Analysis and Design Issues for Modern Aerospace Vehicles","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122551969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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