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Juan Álvarez¹, Sergio Gallegos¹, Raymundo Cordero¹, Aldo Ramirez¹, Francisco Zarate², Sergio A. Diaz³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-9, 2023, DOI:10.23967/j.rimni.2023.06.005 - 21 June 2023
Abstract At present, the beam-column connection system through a self-centering post-tensioned connection is currently an alternative to improve the seismic behavior in reinforced concrete buildings; by allowing its elements to have a linear behavior (no damage) in the face of displacements produced by seismic actions. This paper deals with the numerical modeling of the seismic behavior for a self-centering connection based on the Discrete Element Method (MED) is presented, with the aim of validating the hysterical response of the numerical model with an experimental test of the literature. The results demonstrated the horizontal distortions in the… More >

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Héctor Rodrigo Amezcua Rivera¹, Amado Gustavo Ayala Milián¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-11, 2023, DOI:10.23967/j.rimni.2023.06.002 - 20 June 2023
Abstract n this paper, a computationally efficient strategy for the approximation of the non- linear behaviour of structures through the finite element method is proposed. This proposal is based on the execution of a set of linear analyses in which the strength of the elements where the damage occurs is sequentially degraded and, in addition, complemented with a stabilized reduced numerical integration scheme for solid finite elements. Thus, the stiffness matrix only contains information of one integration point and, consequently, the stresses are computed only at that point. Also, due to the stabilization, it is possible More >

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Kesavan Duraisamy¹, S.Padma¹, M.Senthil Kumar¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-5, 2023, DOI:10.23967/j.rimni.2023.06.003 - 20 June 2023
Abstract To obtain an optimum power market the deregulation process is implemented for the entire electrical market and further classified as transmission and distribution units. Each firm focuses on delivering its best output which leads to congestion issues on transmission lines as there is in-adequate transmission capability to satisfy the load demand, and transmission congestion occurs. Transmission cable congestion results from a lack of coordination between the utilities that handle generating, transmission, and distribution leading to a generator failure, an abrupt increase in load demand, or the miscarriage of equipment, all of which can be fixed More >

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H. Fang¹, Xianjun Zhou, Zhifei Liu, Yuxuan Peng, Yuwen Wu, Jianhua Li
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-7, 2023, DOI:10.23967/j.rimni.2023.04.002 - 14 April 2023
Abstract In order to reduce the number of hydraulic decoders and hydraulic control pipelines in hydraulically controlled intelligent wells, reduce production costs and improve oil recovery efficiency, the structural design of ICV control of two hydraulic control pipelines and a single hydraulic decoder for four production layers in the well was completed. By simulating the response law of downhole hydraulic signals and the stress analysis of each structure, the motion equation of the layer selection structure of the hydraulic decoder was established with 4 MPa as the unlocking pressure, and ADAMS was used to complete the More >

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Weigang Fu¹, Xiang Tan², Liangzhong Ao¹, Yaoming Fu¹, Peng Guo^3,4
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-9, 2023, DOI:10.23967/j.rimni.2023.05.002 - 16 May 2023
Abstract The value of the gas-path parameter, exhaust gas temperature margin (EGTM), is the critical index for predicting aeroengine performance degradation. Accurate predictions help to improve engine maintenance, replacement schedules, and flight safety. The outside air temperature (OAT), altitude of the airport, the number of flight cycles, and water washing information were chosen as the sample input variables for the data-driven prognostic model for predicting the take-off EGTM of the on-wing engine. An attention-based deep learning framework was proposed for the aeroengine performance prediction model. Specifically, the multiscale convolutional neural network (CNN) structure is designed to More >

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Cesar Hernandez¹, Jhanie Rodriguez²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-6, 2023, DOI:10.23967/j.rimni.2023.05.006 - 31 May 2023
Abstract "This work aims to develop a computational tool for synthesizing a four-bar linkage mechanism that can generate a prescribed path for a point coupler link to follow. The dimensional synthesis of the mechanism involves determining the lengths of each of its links. In this case, two possible configurations are evaluated: crank-rocker and/or double crank. The prescribed path consists of an arbitrary number of points contained in a plane, along with the corresponding rotation degrees of the driver element.'' Dimensioning the mechanism involves many variables, and it is possible to obtain various configurations that generate paths… More >

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Jingxiu Ling^1,2, Li Haoyu³, Qianting Wang³, Long Cheng³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-10, 2023, DOI:10.23967/j.rimni.2023.04.005 - 28 April 2023
Abstract The bearing was a key component of the mining machine tire unloader machine and was subjected to random multiaxial stress during operation. Therefore, the life prediction of bearing was of safety guidance. In this paper, a bearing life prediction method based on the critical plane method under multiaxial random loading was proposed. Firstly, a virtual prototype model was built based on the actual working conditions of the tire unloader machine to obtain the time load history of the bearing. Transient dynamic analysis of the bearing was carried out to obtain the triaxial stress-strain time histories… More >

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Van Thao Le¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-3, 2023, DOI:10.23967/j.rimni.2023.06.007 - 30 June 2023
Abstract The suffusion susceptibility of the soil samples is evaluated through an erosion resistance index. Thanks to existing statistical analyses, the erosion resistance index is estimated from several soil parameters. In actual exploitation, the soil properties with the input parameters related to the grain distribution of the soil… vary greatly from the original design value due to the influence of many factors. One of the factors is the inherent variability. Inherent soil variability is modelled as a random field. The usual problems used to assess the suffusion susceptibility may be not give accurate results or fully… More >

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jingxiu Ling¹, Rongchang Zhang², Jiacheng Shao¹, Hao Zhang³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-24, 2023, DOI:10.23967/j.rimni.2023.04.001
Abstract Bearing is an important rotating support part of tyre unloader, and its fatigue reliability is an important part of the whole system reliability. Because of the huge alternating stress, the support bearing is required to have high fatigue life and reliability. In this paper, combined with stress-strength interference model and statistical theory, the life distribution of bearing steel material is predicted by using group test data; Based on the multi-rigid body dynamics and finite element numerical simulation platform, the reliability of the bearing of tyre unloader under different operating years was predicted by using the… More >

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Hai Liu¹, Guang-Hui Ma¹, Zhe Geng¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-5, 2023, DOI:10.23967/j.rimni.2023.05.005 - 30 May 2023
Abstract The granular-media-based push-bending process has been developed to manufacture thin-wall elbow tube with t/D≤0.01 (the ratio of wall thickness to outer diameter) and R/D≤1.5 (the ratio of bending radius to outer diameter). In the process, a tubular blank is filled with granular media and then pushed into a die to form an elbow shape. To investigate the process, a FEM-DEM coupling model has been developed, in which FEM is used to simulate bending deformation of tubular blank, and DEM is used to calculate contact forces between spherical particles in granular media. In this work, an More >

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Rodrigo Vicente Montero-Mayoral¹, Vicente Francisco González-Albuixech², Miguel Ángel Sanz-Gómez², Víctor Yanes²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-6, 2023, DOI:10.23967/j.rimni.2023.04.003 - 08 May 2023
Abstract Metamaterials are generated from an interrelated set of cells and can present a macroscopic behaviour that differs from the one that characterizes its basic constituents. Modelling the influence that the damage and fracture of the elemental constituents have in the macroscopic properties of the metamaterial is relevant for its mechanical analysis. Altering the resistant behaviour of the elements (changing their longitudinal elastic modulus), it is possible to approximate the effect of the damage in the complete structure. It is considered as valid the substitution of the damage and plastic deformation phenomena by intermediate states contained… More >

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Nashwa Mohamed Mounir¹, Fathy E. Said, Mohamed Enany
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-8, 2023, DOI:10.23967/j.rimni.2023.05.003 - 22 May 2023
Abstract The modeling of both the synchronous generator and induction motor which is represented by the rotor reference frame was studied where the modeling was established using MATLAB /SIMULINK software package for an isolated synchronous generator direct-on-line with different sized induction motors; 20, 50, and 100 Hp, at manually adjusted excitation voltage values which were maintained constant at 3.35, 4.55, and 6.21 V, respectively. The purpose of this work is to study the impact of a sudden increase in the load torque; from 0 to 150 % with an increase of 25 %, of full load… More >

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Rogério Francisco Puppi¹, José Manoel Caron²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-15, 2023, DOI:10.23967/j.rimni.2023.06.001 - 19 June 2023
Abstract '''– Design of steep slopes and retaining walls, reinforced with geotextile or geogrids, requires internal stability checks usually referred to a critical failure surface, which determines the amount of reinforcement required. In determining the length of the reinforcement layers the position of the critical surface and also of the sub-critical surfaces must be considered. In relation to these, are verified the anchorage lengths required to ensure the pullout resistance of the reinforcements. This paper presents a study based on limit equilibrium analysis, with bi-linear failure surface, to determine the amount and length of the reinforcement… More >

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Zhenggeng Qu^1,2, Danying Niu³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-7, 2023, DOI:10.23967/j.rimni.2023.06.004 - 23 June 2023
Abstract Degenerative polyarthritis is the most common joint disease and affects millions of people worldwide. However, there is currently no cure for degenerative polyarthritis and no effective methods to prevent or slow down its progression. Gene regulatory relationships are vital for understanding disease mechanisms and developing treatment and novel drugs. Gene regulatory networks can be obtained from the RNA sequencing. Although various single-cell and bulk RNA sequencing data are available, an effective method to integrate the data for molecular diagnosis and treatment of degenerative polyarthritis has not yet been carried out. Here, we propose a novel… More >

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Shoujin Shi¹, Yifeng Han¹, Jianke Hu¹, Yida Zhou¹, Taoyong Hu¹, Yidan Lou¹, Jingkun Wang¹, Tao Hou²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-8, 2023, DOI:10.23967/j.rimni.2023.04.004 - 24 April 2023
Abstract The water resources in southwest China is abundant and the seismicity is strong, so it is necessary to study the dynamic response and safety of hydraulic structures under rare earthquake. Taking a typical radial steel gate as an example, a three-dimensional numerical model considering the interaction between water and gate during the earthquake is established. The accuracy and applicability of the model are verified by comparing with the measured results of the dynamic response of Zipingpu dam during the Wenchuan earthquake. Thereafter, the dynamic displacement and stress, and resonance frequency of the radial gate under… More >

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Francisco Zarate¹, Thibault Villette², Xavier Martinez^1,3, Fernando Rastellini Canela¹, David Cendón⁴, Carmen Andrade⁵, Eugenio Oñate^1,3
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-13, 2023, DOI:10.23967/j.rimni.2023.05.001 - 04 May 2023
Abstract We present a combination of three dimensional (3D) solid elements and rotation-free beam elements for non-linear analysis of fiber-reinforced polymer (FRP) of rebars. The matrix material is modelled by 3D solid elements while the fibers are modelled with rotation-free beam elements. The absence of rotation variables in the beam elements allows the straightforward coupling of 3D solid and beam elements using a formulation with displacement nodal degrees of freedom only. Both solid and beam elements are formulated in an updated Lagrangian description. The behavior of the matrix and the fiber material are modelled with an More >

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Lianyu Zhang, Shijie Wang, Wei Lv¹, Guangtao Yue, Yuan Ge, Zhengyang Zhao², Xianjun Zhou²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-6, 2023, DOI:10.23967/j.rimni.2023.05.004 - 26 May 2023
Abstract In order to solve the problem of "gas explosion" at the end of common rubber cylinder in the process of high temperature, high pressure and gas drive operation, the rubber cylinder with new structure suitable for 5_1/2 in casing pipe is developed. The "M" type single rubber cylinder structure is adopted in the new structure rubber cylinder, and the "gas explosion" problem of the end gas in the low-pressure side is solved by setting the double-layer staggered slotted steel cover to prevent outburst. The finite element method is used to simulate the setting of the rubber More >

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Yan Zhang¹, Jichao Zhang¹, Xinxing Xu²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-6, 2023, DOI:10.23967/j.rimni.2023.05.007 - 09 June 2023
Abstract In this paper, an analytical solution is developed to investigate soil consolidation around a pile under earthquake loading. The solution is validated using finite element method. The influence of various parameters on excess pore water pressure is analyzed. The results show that excess pore water pressure increases with depth and is positively correlated with n and N_eq / N₁ , while negatively correlated with η , χ , k_v , and t_d . The values of η , χ , k_v , N_eq / N₁ , and t_d affect excess pore water pressure during and after the earthquake, while… More >

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Anchen Zu¹, Mingshi Yue¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-9, 2023, DOI:10.23967/j.rimni.2023.06.006 - 26 June 2023
Abstract This study investigates a retailer's ordering strategy under the framework of the economic order quantity (EOQ) model. A supplier offers a retailer a disposable coupon and allows it to place a special order at any time in a promotion period. The promotion period is not necessary short and shortages are allowed throughout the time horizon. In addition to the special order time and the special order quantity, the retailer needs to decide whether to place some regular orders in the promotion period before placing the special order for the purpose of making better use of More >

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