Archive of Mechanical Engineering最新文献_第4页

Slow flow past a weakly permeable spheroidal particle in a hypothetical cell 在一个假想的细胞中缓慢流过一个弱渗透性的球形粒子

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/ame.2021.137044

引用次数: 0

Application of differential evolution algorithm for identification of experimental data 差分进化算法在实验数据识别中的应用

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/ame.2007.131561

Łukasz Maciejewski, Wojciech Myszka, Grażyna Ziętek

{"title":"Application of differential evolution algorithm for identification of experimental data","authors":"Łukasz Maciejewski, Wojciech Myszka, Grażyna Ziętek","doi":"10.24425/ame.2007.131561","DOIUrl":"https://doi.org/10.24425/ame.2007.131561","url":null,"abstract":"In the paper, the authors present the approach to modelling of austenitic steel hardening basing on the Frederick-Armstrong’s rule and Chaboche elastic-plastic material model with mixed hardening. Non-linear uniaxial constitutive equations are derived from more general relations with the assumption of an appropriate evolution of back stress. The aim of the paper is to propose a robust and efficient identification method of a well known material model. A typical LCF strain-controlled test was conducted for selected amplitudes of total strain. Continuous measurements of instant stress and total strain values were performed. Life time of a specimen, signals amplitudes and load frequency were also recorded. Based on the measurement, identification of constitutive equation parameters was performed. The goal was to obtain a model that describes, including hardening phenomenon, a material behaviour during the experiment until the material failure. As a criterion of optimisation of the model least square projection accuracy of the material response was selected. Several optimisation methods were examined. Finally, the differential evolution method was selected as the most efficient one. The method was compared to standard optimisation methods available in the MATLAB environment. Significant decrease of computation time was achieved as all the optimisation procedures were run parallel on a computer cluster.","PeriodicalId":45083,"journal":{"name":"Archive of Mechanical Engineering","volume":"521 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637388","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: 2

Advanced lifetime assessment of steam turbine components based on long-term operating data 基于长期运行数据的汽轮机部件先进寿命评估

IF 0.7

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/AME.2018.125443

M. Banaszkiewicz, W. Radulski, K. Dominiczak

引用次数: 4

Development of identification procedure for the internal and external damping in a cracked rotor system undergoing forward and backward whirls 裂纹转子系统内外阻尼识别程序的发展

IF 0.7

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/AME.2019.128446

D. Roy, R. Tiwari

{"title":"Development of identification procedure for the internal and external damping in a cracked rotor system undergoing forward and backward whirls","authors":"D. Roy, R. Tiwari","doi":"10.24425/AME.2019.128446","DOIUrl":"https://doi.org/10.24425/AME.2019.128446","url":null,"abstract":"In the present work, a procedure for the estimation of internal damping in a cracked rotor system is described. The internal (or rotating) damping is one of the important rotor system parameters and it contributes to the instability of the system above its critical speed. A rotor with a crack during fatigue loading has rubbing action between the two crack faces,which contributes to the internal damping.Hence, internal damping estimation also can be an indicator of the presence of a crack. A cracked rotor system with an offset disc, which incorporates the rotary and translatory of inertia and gyroscopic effect of the disc is considered. The transverse crack is modeled based on the switching crack assumption, which gives multiple harmonics excitation to the rotor system.Moreover, due to the crack asymmetry, the multiple harmonic excitations leads to the forward and backward whirls in the rotor orbit. Based on equations of motions derived in the frequency domain (full spectrum), an estimation procedure is evolved to identify the internal and external damping, the additive crack stiffness and unbalance in the rotor system. Numerically, the identification procedure is tested using noisy responses and bias errors in system parameters.","PeriodicalId":45083,"journal":{"name":"Archive of Mechanical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944953","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: 6

Limit cycle oscillation prediction based on Finite Element-Modal approach 基于有限元-模态法的极限环振荡预测

IF 0.7

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/AME.2018.125439

K. Ahmad, Shigang Wu, H. Rahman

{"title":"Limit cycle oscillation prediction based on Finite Element-Modal approach","authors":"K. Ahmad, Shigang Wu, H. Rahman","doi":"10.24425/AME.2018.125439","DOIUrl":"https://doi.org/10.24425/AME.2018.125439","url":null,"abstract":"The central theme of this work was to analyze high aspect ratio structure having structural nonlinearity in low subsonic flow and to model nonlinear stiffness by finite element-modal approach. Total stiffness of high aspect ratio wing can be decomposed to linear and nonlinear stiffnesses. Linear stiffness is modeled by its eigenvalues and eigenvectors, while nonlinear stiffness is calculated by the method of combined Finite Element-Modal approach. The nonlinear modal stiffness is calculated by defining nonlinear static load cases first. The nonlinear stiffness in the present work is modeled in two ways, i.e., based on bending modes only and based on bending and torsion modes both. Doublet lattice method (DLM) is used for dynamic analysis which accounts for the dependency of aerodynamic forces and moments on the frequency content of dynamic motion. Minimum state rational fraction approximation (RFA) of the aerodynamic influence coefficient (AIC) matrix is used to formulate full aeroelastic state-space time domain equation. Time domain dynamics analyses show that structure behavior becomes exponentially growing at speed above the flutter speed when linear stiffness is considered, however, Limit Cycle Oscillations (LCO) is observed when linear stiffness along with nonlinear stiffness, modeled by FE-Modal approach is considered. The amplitude of LCO increases with the increase in the speed. This method is based on cantilevered configuration. Nonlinear static tests are generated while wing root chord is fixed in all degrees of freedom and it needs modification if one requires considering full aircraft. It uses dedicated commercial finite element package in conjunction with commercial aeroelastic package making the method very attractive for quick nonlinear aeroelastic analysis. It is the extension of M.Y. Harmin and J.E. Cooper method in which they used the same equations of motion and modeled geometrical nonlinearity in bending modes only. In the current work, geometrical nonlinearities in bending and in torsion modes have been considered.","PeriodicalId":45083,"journal":{"name":"Archive of Mechanical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944791","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

An efficient parallel global optimization strategy based on Kriging properties suitable for material parameters identification 一种适用于材料参数辨识的基于Kriging特性的并行全局优化策略

IF 0.7

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/AME.2020.131689

E. Roux, Y. Tillier, Salim Kraria, P. Bouchard

{"title":"An efficient parallel global optimization strategy based on Kriging properties suitable for material parameters identification","authors":"E. Roux, Y. Tillier, Salim Kraria, P. Bouchard","doi":"10.24425/AME.2020.131689","DOIUrl":"https://doi.org/10.24425/AME.2020.131689","url":null,"abstract":"Material parameters identification by inverse analysis using finite element computations leads to the resolution of complex and time-consuming optimization problems. One way to deal with these complex problems is to use meta-models to limit the number of objective function computations. In this paper, the Efficient Global Optimization (EGO) algorithm is used. The EGO algorithm is applied to specific objective functions , which are representative of material parameters identification issues. Isotropic and anisotropic correlation functions are tested. For anisotropic correlation functions, it leads to a significant reduction of the computation time. Besides, they appear to be a good way to deal with the weak sensitivity of the parameters. In order to decrease the computation time, a parallel strategy is defined. It relies on a virtual enrichment of the meta-model, in order to compute q new objective functions in a parallel environment. Different methods of choosing the qnew objective functions are presented and compared. Speed-up tests show that Kriging Believer (KB) and minimum Constant Liar (CLmin) enrichments are suitable methods for this parallel EGO (EGO-p) algorithm. However, it must be noted that the most interesting speed-ups are observed for a small number of objective functions computed in parallel. Finally, the algorithm is successfully tested on a real parameters identification problem.","PeriodicalId":45083,"journal":{"name":"Archive of Mechanical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68945079","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: 6

Hybrid GRA-PCA and modified weighted TOPSIS coupled with Taguchi for multi-response process parameter optimization in turning AISI 1040 steel 混合GRA-PCA和改进加权TOPSIS与田口组合优化AISI1040钢车削多响应工艺参数

IF 0.7

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/AME.2020.131707

Sultana Mst. Nazma, Dhar Nikhil Ranjan

引用次数: 6

Experimental investigations of the flow phenomena in the rotor blades of the axial flow low speed compressor stage at the unstable part of the overall performance characteristic 实验研究了轴流式低速压气机级转子叶片内流动现象在不稳定部分的整体性能特征

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/ame.2008.131630

A. Witkowski, M. Ziach, M. Majkut, M. Strozik

{"title":"Experimental investigations of the flow phenomena in the rotor blades of the axial flow low speed compressor stage at the unstable part of the overall performance characteristic","authors":"A. Witkowski, M. Ziach, M. Majkut, M. Strozik","doi":"10.24425/ame.2008.131630","DOIUrl":"https://doi.org/10.24425/ame.2008.131630","url":null,"abstract":"The paper presents experimental investigations of pressure ﬂuctuations near the tip clearance region of the rotor blades of the axial-ﬂow low-speed compressor stage in stable and unstable parts of the overall performance characteristic. In this investigation, unsteady pressure was measured with the use of high frequency pressure transducers mounted on the casing wall of rotor passage. The pressure signals and their frequency characteristics were analyzed during the steady-state processes, before the rotating stall, during the transition from the steady-state process to the rotating stall, and during a stabilized phenomenon of low-frequency rotating stall. As the operating point moves to the unstable region of ﬂow characteristic, an inception of the rotating stall can be observed, which rotates with a speed of about 41.4% of the rotor speed. The results of this study conﬁrm that in the low-speed axial compressor stage operating in a rotating stall regime there appears one stall cell that spreads over to adjacent rotor blade channels. As the ﬂow rate is reduced further, the frequency of the rotating stall decreased to 34.8% of the rotor speed and the number of blade channels with the stall cell increases.","PeriodicalId":45083,"journal":{"name":"Archive of Mechanical Engineering","volume":"11 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544898","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: 6

Guidance system of smart mortar missile 智能迫击炮导弹制导系统

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/ame.2007.131544

R. Głębocki, R. Vogt

引用次数: 16

Optimizing the weight of the two-level gear train in the personal rescue winch 个人救援绞车两级轮系重量优化

Archive of Mechanical Engineering Pub Date : 2023-11-06 DOI: 10.24425/ame.2021.138393

引用次数: 1