Applied and Computational Mechanics最新文献_第2页

Simple qualitative dynein model in Nose-Hoover framework Nose-Hoover框架下的简单定性动力模型

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.688

J. Rosenberg, M. Krejčová

引用次数: 0

Numerical modal analysis of DTU 10-MW reference wind turbine’s blade using modified Myklestad´s method 采用改进的Myklestad方法对DTU 10mw参考风力机叶片进行数值模态分析

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.728

Lucas Meirelles Pereira, Marco Tulio Santana Alves

{"title":"Numerical modal analysis of DTU 10-MW reference wind turbine’s blade using modified Myklestad´s method","authors":"Lucas Meirelles Pereira, Marco Tulio Santana Alves","doi":"10.24132/acm.2022.728","DOIUrl":"https://doi.org/10.24132/acm.2022.728","url":null,"abstract":"Since the rotor blade system of an horizontal axis wind turbine is responsible for converting wind energy into mechanical, which turns into electrical and predicting its dynamic behavior is of vital importance. In that sense, this paper deals with performing a modal analysis of a blade belonging to the DTU 10-MW reference wind turbine by using a modified Myklestad’s method. The blade model was built on two different keystones, as follows: first, considering uncoupled bending in out-of-plane (flapwise) and in-plane (edgewise) directions and considering a coupled bending-torsion motion also in both directions. In order to accomplish these objectives, a Python code was implemented. The computed eigenfrequencies were compared to the results obtained for the blade by using the finite element method. Besides, the mode shapes were plotted and the centrifugal stiffening was also taken into account. Results suggest the feasibility of the modified Myklestad’s method for modal analysis purposes, since good agreement with reference data was achieved and considering that the Myklestad’s method has a considerably less complex implementation than the finite element method.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69073727","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

The Analytical and Numerical Stress Analysis of Various Domes for Composite Pressure Vessels 复合材料压力容器各种圆顶的应力分析与数值分析

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.781

Z. Padovec, D. Vondráček, T. Mareš

引用次数: 2

Fracture behavior of prestressed ductile target subjected to high velocity impact - Numerical study 高速冲击下预应力延性靶的断裂行为-数值研究

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.779

Yogeshwar Jasra, R. Saxena

{"title":"Fracture behavior of prestressed ductile target subjected to high velocity impact - Numerical study","authors":"Yogeshwar Jasra, R. Saxena","doi":"10.24132/acm.2022.779","DOIUrl":"https://doi.org/10.24132/acm.2022.779","url":null,"abstract":"Impact studies are performed to evaluate the ballistic performance of material subjected to a high strain rate. At high velocities, the projectile penetrates through the material which leads to a fracture of the target body. The fracture behavior depends upon the condition of the target body. It is anticipated that the fracture behavior should depend upon the prestress condition of the target. Considering the aforementioned concern, the thermo-elastic-plastic finite element model is formulated using MSC Marc Mentat to analyze the effect of the prestress condition of the target body on fracture behavior. A detailed comparison has been presented considering four different prestress states subjected to impact by a blunt-shaped projectile. The continuum damage mechanics using a stress triaxiality-based damage model is used to simulate damage evolution and fracture. It is found that the presence of prestress alters the overall fracture response of the structure subjected to high strain rate deformation. In the presence of tensile prestress, the material resists the accumulation of damage which is due to the lower values of stress triaxiality and equivalent plastic strain. It is also found that the presence of tensile prestress inside the target body increases the ballistic performance, whereas the presence of compressive prestress inside the target body degrades the performance.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69074117","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

Numerical Investigation of Enhanced Oil Recovery from various Rocks by Nanosuspensions Flooding 纳米悬浮驱提高不同岩石采收率的数值研究

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.22055/JACM.2021.38217.3182

D. Guzei, A. Minakov, M. Pryazhnikov, S. Ivanova

引用次数: 1

On fatigue life predictions for notched members by the nominal stress-based and the local strain-based methods 基于名义应力和局部应变的缺口构件疲劳寿命预测方法研究

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2021.678

J. Duran

{"title":"On fatigue life predictions for notched members by the nominal stress-based and the local strain-based methods","authors":"J. Duran","doi":"10.24132/acm.2021.678","DOIUrl":"https://doi.org/10.24132/acm.2021.678","url":null,"abstract":"Traditional engineeringmodels for addressing fatigue issues are based on empirical relations between the necessary number of cycles for fatigue failures $N_f$ and either, the nominal stress $sigma_{an}$ or the local strain $epsilon_a$ amplitudes. The aim of the present paper is to highlight the advantages of the local strain-based approach $epsilon N$ for fatigue assessment of notched components over the more traditional stress-based approach $sigma N$. Since a closed form solution for the ratio between fatigue life predictions among the two methods does not exist, we have considered a hypothetical case study that included variables such as the applied stress, the stress concentration factor and the structural material, and numerically calculated the expected fatigue life according to each approach. In order to highlight the differences related with the stress-strain analysis, the applied nominal stresses (uniaxial) were limited to the elastic region where both methods use approximately the same fatigue strength curve. Additionally a unique and equal function for accounting for themean stress effects was incorporated in both approaches. Fatigue life predictions are expressed in universal graphs of normalized stress versus the $N_f-ratio$, the latter parameter defined as the quotient between the $N_f$ predictions according to the $sigma N$ and $epsilon N$ approaches, considering the average values for a group of sixty structural steels at each load level. The results confirm that fatigue life predictions under the traditional stress based approach are conservative when compared to the strain based approach for all the possible scenarios described by the variables involved.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69072982","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

Validation of two-fluid model for water hammer in elastic pipes 弹性管道水锤双流体模型的验证

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.765

Mohamed Ouzi, Mohamed Tamani, H. Samri, B. Bahrar

引用次数: 0

From A.Tondl's Dutch contacts to Neimark-Sacker-bifurcation 从A.Tondl的荷兰联系人到neimmark - sacker分岔

Applied and Computational Mechanics Pub Date : 2022-01-01 DOI: 10.24132/acm.2022.770

T. Bakri, F. Verhulst

引用次数: 2

Dynamic Response of a Step Loaded Cubic Cavity Embedded in a Partially Saturated Poroelastic Half-Space by the Boundary Element Method 用边界元法研究嵌在部分饱和孔弹性半空间中的阶跃加载立方体空腔的动力响应

Applied and Computational Mechanics Pub Date : 2021-11-16 DOI: 10.22055/JACM.2021.38487.3240

A. Petrov, M. V. Grigoryev, L. Igumnov, A. Belov, V. Eremeyev

引用次数: 0

Pull-in Phenomenon in the Electrostatically Micro-switch Suspended between Two Conductive Plates using the Artificial Neural Network 用人工神经网络研究悬浮在导电板间的静电微动开关的拉入现象

Applied and Computational Mechanics Pub Date : 2021-11-11 DOI: 10.22055/JACM.2021.38569.3248

M. Aliasghary, Hamed Mobki, H. Ouakad

引用次数: 5