Modelling and Simulation in Engineering最新文献_第10页

Solving Parabolic and Hyperbolic Equations with Variable Coefficients Using Space-Time Localized Radial Basis Function Collocation Method 用空时定域径向基函数配置法求解变系数抛物型和双曲型方程

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-02-06 DOI: 10.1155/2021/6688806

Mohammed Hamaidi, A. Naji, A. Taik

{"title":"Solving Parabolic and Hyperbolic Equations with Variable Coefficients Using Space-Time Localized Radial Basis Function Collocation Method","authors":"Mohammed Hamaidi, A. Naji, A. Taik","doi":"10.1155/2021/6688806","DOIUrl":"https://doi.org/10.1155/2021/6688806","url":null,"abstract":"In this paper, we investigate the numerical approximation solution of parabolic and hyperbolic equations with variable coefficients and different boundary conditions using the space-time localized collocation method based on the radial basis function. The method is based on transforming the original \u0000 \u0000 d\u0000 \u0000 -dimensional problem in space into \u0000 \u0000 \u0000 \u0000 d\u0000 +\u0000 1\u0000 \u0000 \u0000 \u0000 -dimensional one in the space-time domain by combining the \u0000 \u0000 d\u0000 \u0000 -dimensional vector space variable and \u0000 \u0000 1\u0000 \u0000 -dimensional time variable in one \u0000 \u0000 \u0000 \u0000 d\u0000 +\u0000 1\u0000 \u0000 \u0000 \u0000 -dimensional variable vector. The advantages of such formulation are (i) time discretization as implicit, explicit, \u0000 \u0000 θ\u0000 \u0000 -method, method-of-line approach, and others are not applied; (ii) the time stability analysis is not discussed; and (iii) recomputation of the resulting matrix at each time level as done for other methods for solving partial differential equations (PDEs) with variable coefficients is avoided and the matrix is computed once. Two different formulations of the \u0000 \u0000 d\u0000 \u0000 -dimensional problem as a \u0000 \u0000 \u0000 \u0000 d\u0000 +\u0000 1\u0000 \u0000 \u0000 \u0000 -dimensional space-time one are discussed based on the type of PDEs considered. The localized radial basis function meshless method is applied to seek for the numerical solution. Different examples in two and three-dimensional space are solved to show the accuracy of such method. Different types of boundary conditions, Neumann and Dirichlet, are also considered for parabolic and hyperbolic equations to show the sensibility of the method in respect to boundary conditions. A comparison to the fourth-order Runge-Kutta method is also investigated.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"2015 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2021-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86889707","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

Corrigendum to “Eulerian Oil Spills Model Using Finite-Volume Method with Moving Boundary and Wet-Dry Fronts” 对 "使用有限体积法建立具有移动边界和干湿锋的欧拉溢油模型 "的更正

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-01-23 DOI: 10.1155/2021/6418926

Ehsan Sarhadizadeh, K. Hejazi

引用次数: 1

Modelling and Simulation for Concrete Durability: Mechanism and Prediction 混凝土耐久性建模与模拟：机理与预测

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2021-01-01 DOI: 10.1155/2021/9782710

Qing-feng Liu, B. Šavija, J. Xia, Xiaoshan Lin, D. Hou

引用次数: 0

Research on Variable Universe Fuzzy PID Control Strategy of Pipe Lining Induction Heating System 管道感应加热系统变域模糊PID控制策略研究

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-12-02 DOI: 10.1155/2020/8852943

Yuzhong Wang, M. Wei, Xue Hu, Minghong Jiang, Lixin Zhang

{"title":"Research on Variable Universe Fuzzy PID Control Strategy of Pipe Lining Induction Heating System","authors":"Yuzhong Wang, M. Wei, Xue Hu, Minghong Jiang, Lixin Zhang","doi":"10.1155/2020/8852943","DOIUrl":"https://doi.org/10.1155/2020/8852943","url":null,"abstract":"It is a promising heat supply strategy to use induction heating for the pipe lining process, but temperature control is hindering its application. In this study, we designed the variable universe fuzzy PID controller, and the lining induction heating system model was used to verify its performance. First, the transfer function parameters of the lining induction heating system are obtained by the step response method. Then, a point-by-point convergent interpolator is established through the contraction-expansion factors to realize the adaptive expansion of the fuzzy universe. Finally, the performance of PID, fuzzy PID, and variable universe fuzzy PID are compared through simulation experiments, and the ability of the controller to resist disturbance is verified by adding interference. The results show that the variable universe fuzzy PID controller can greatly improve the performance of fuzzy PID in response speed and settle time. The average stability error is smaller than PID and fuzzy PID control. It can meet the speed and accuracy requirements of the lining induction heating system. This research can be used as a reference for induction heating precise control and evidence that the variable universe fuzzy PID control can satisfy the lining induction heating process.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"32 1","pages":"1-9"},"PeriodicalIF":3.2,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77431466","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: 5

Heat Transfer of Gas Flow within a Partially Heated or Cooled Square Cavity 部分加热或冷却方腔内气体流动的传热

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-11-25 DOI: 10.1155/2020/8886682

M. Hssikou, Y. Elguennouni, Jamal Baliti, M. Alaoui

引用次数: 2

A Social Force Model for Pedestrians’ Movements Affected by Smoke Spreading 烟雾扩散影响下行人运动的社会力模型

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-11-13 DOI: 10.1155/2020/8819076

J. Makmul

引用次数: 4

Fatigue Characteristics and Numerical Modelling Prosthetic for Chopart Amputation Chopart截肢假肢的疲劳特性及数值模拟

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-11-13 DOI: 10.1155/2020/4752479

S. M. Abbas, Ammar I. Kubba

{"title":"Fatigue Characteristics and Numerical Modelling Prosthetic for Chopart Amputation","authors":"S. M. Abbas, Ammar I. Kubba","doi":"10.1155/2020/4752479","DOIUrl":"https://doi.org/10.1155/2020/4752479","url":null,"abstract":"This research is looking for three laminated composite material groups. These three groups were utilized in experimental investigation to find their mechanical properties. These properties have been used to design and manufacture a socket for a partial foot prosthesis using an ANSYS model. This socket was manufactured with a vacuum pressure device to improve its properties. The socket composite material was tested for tensile and fatigue properties; then, its results were used in the ANSYS model. The composite material matrix was laminated in an 80 : 20 ratio, and there were three types of reinforcement lamination material (Perlon, glass fiber, and carbon fiber). The mechanical property results of these tests were found as follows: using onlyPerlon reinforcement, the properties are σy = 33:6MPa, σult = 35:6MPa, and modulus of elasticity = 1:03GPa; using (3Perlon +2carbon fiber +3perlon) layers, the properties were σy = 65:5MPa, σult = 92:5MPa, and modulus of elasticity = 1:99GPa; and using (3Perlon + 2 glass fiber + 3perlon) layers, the results were σy = 40MPa, σult = 46:6MPa, and modulus of elasticity = 1:4 GPa. The ANSYS model used the boundary condition from the measured contact pressure between the socket and the patient’s stump. The MatScan (F-socket) pressure sensor utilized these interface pressure measurements. The maximum values for the pressure were found as follows: 190 kPa and 164 kPa, which are recorded in the posterior and lateral locations, respectively. The calculated factor of safety for the prosthesis that has been made from a selected composite material with the following layers (3 Perlon+2 carbon fiber+3 Perlon) is 1.037 which is safe for design prosthetic applications. From this study, more prosthetic designs can be modelled and manufactured using this approach. Prosthetics and orthotics are usually custom-made for each patient according to its specific requirements. So, it will be very helpful to find a procedure to analyze the prosthetics before manufacturing it.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"37 1","pages":"1-10"},"PeriodicalIF":3.2,"publicationDate":"2020-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79110434","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

Sidelobe Suppression in Array-Pattern Synthesis Using Periodic Leaky-Wave Antenna and Binomial Array 周期漏波天线和二项阵阵阵图合成中的旁瓣抑制

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-11-10 DOI: 10.1155/2020/6201767

Hicham Aziz, M. Moubadir, A. Farkhsi, N. Amar Touhami

引用次数: 6

Power Flow Simulation for Two-Degree-of-Freedom Planetary Gear Transmissions with Experimental Validation 二自由度行星齿轮传动功率流仿真及实验验证

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-11-06 DOI: 10.1155/2020/8837605

H. A. Hussen, E. L. Esmail, Rahman A. Hussen

{"title":"Power Flow Simulation for Two-Degree-of-Freedom Planetary Gear Transmissions with Experimental Validation","authors":"H. A. Hussen, E. L. Esmail, Rahman A. Hussen","doi":"10.1155/2020/8837605","DOIUrl":"https://doi.org/10.1155/2020/8837605","url":null,"abstract":"The basic relationships among gear ratios, velocity succession, torque directions, power ratios, energy losses, and efficiency are derived from first principles. The techniques presented here can be applied to ordinary, planetary, or mixed gear trains. Also, these techniques provide more insight into how power is flowing through the different parts of the mechanism. Power flow relationships are a helpful tool to study power amplification and power circulation in multipath transmissions. They also provide more insight into how the gear pair entities (GPEs) or gear train entities (GTEs) affect total power losses and allow immediate derivation of the overall efficiency. A representative two-input mechanism is analyzed to demonstrate the effectiveness of improved techniques. The theoretical results are compared with experimental data of previous work. The theoretical and experimental curves exhibit identical trends with a distinct jump in friction loss. The jump is explained by a change in the way of the power flow through the mechanism. The conditions under which power circulation occurs are determined. The results have important implications for understanding how to improve the efficiency of multipath power flow systems.","PeriodicalId":45541,"journal":{"name":"Modelling and Simulation in Engineering","volume":"7 1","pages":"1-14"},"PeriodicalIF":3.2,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82400923","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: 3

Modelling Low-Salinity Water Flooding as a Tertiary Oil Recovery Technique 低矿化度水驱三次采油技术建模

IF 3.2

Modelling and Simulation in Engineering Pub Date : 2020-10-26 DOI: 10.1155/2020/6485826

O. Olabode, D. Alaigba, Daniel Oramabo, O. Bamigboye

引用次数: 9