Numerical methods

Lecture Finite Element Method - Dr. Danh Truong Nguyen (Eng) is a comprehensive introduction to the fundamental principles and applications of the finite element method in engineering. The lecture covers topics such as energy principles, elastic problems, bar and truss elements, beam and frame analysis, plane stress and strain, and numerical integration techniques. This material is especially useful for students and professionals in mechanical, civil, and structural engineering.

59p hoatrongguong02 15-05-2025 1 1   Download

Currently, permanent magnet synchronous motors with on-line starting are being increasingly researched and applied to partialy replace squirrel cage asynchronous motors, which are commonly used. The reason is that these motors have many advantages such as high efficiency, and high power factor value, stable speed, higher power density compared to induction motors, and the ability to self-start.

7p vijiraiya 19-05-2025 1 1   Download

This paper presents a new approach to establishing the interior ballistic algorithm for mortar systems based on thermodynamic theory. Contrary to previous studies, the processes that occurred in the ignition charges and the gas mixture properties in the barrel were considered in this study. The numerical integration method has been used to solve the problem with high accuracy.

8p vijiraiya 19-05-2025 1 1   Download

The variation of multiple circular cylinders' drag coefficient was investigated using numerical methods. Moreover, the particle tracking simulation was also performed to show the flow structure and how particles move inside the cylinder array. It was found that the density and location of cylinders have a significant influence on the fluid forces, flow structure, and particle movement inside them.

9p vimitsuki 06-05-2025 1 1   Download

In kinematic synthesis and analysis of planar mechanisms the designer must define a geometry and set of motions for a design task. This paper will focus on how to determine the forces or torques acting on the planar mechanism by numerical method when acceleration and dynamic properties of the linkage are known.

9p viling 11-10-2024 3 1   Download

In this paper, we introduce a new method for image reconstruction in ultrasound tomography by using the algebraic method. The numerical results indicate that this method has a shorter computational time and achieves highresolution reconstructions and accurate solutions.

8p viaburame 14-03-2025 2 1   Download

This paper proposed a fuzzy distance and constructed a heuristic algorithm to find one reduction set of numerical decision tables which is called the reduct. The proposed method preserves information measurement of the conditional attribute set.

11p tuetuebinhan000 23-01-2025 2 2   Download

The use of natural-origin active compounds in disease treatment is currently a prevailing trend. Mangiferin, a major component found in mangoes, is present in relatively high proportions. However, mangiferin's disadvantages include low solubility and poor permeability. There are numerous methods available to improve solubility and permeability, among which selfassembly is noteworthy.

10p vinara 11-01-2025 3 1   Download

The authors develop a system of differential equations describing the motion of the structural system equipped with DFP bearings. The Runge-Kutta numerical method, specifically the ode15s function in MATLAB, was used to solve these equations. The results of the calculations provide a comparison of the damping efficiency of the structural system with and without the use of DFP bearings, assessing the effectiveness of vibration isolation during an earthquake, with three components X, Y, and vertical considered.

5p vibenya 31-12-2024 12 2   Download

This research aims to numerically simulate the performance of the tested PC utility poles using Applied Element Method (AEM) and Finite Element Method (FEM). The simulation results demonstrate that both AEM and FEM effectively reproduce the load-displacement relationship observed in the test. Additionally, this study discusses the material models employed in simulations, considering the limitations inherent in numerical modeling.

6p vibenya 31-12-2024 6 2   Download

Chương 3 - Hệ phương trình đại số tuyến tính. Chương này cung cấp cho người học những kiến thức về phương pháp tính trực tiếp và các phương pháp lặp. Nội dung cụ thể gồm: Phương pháp khử Gaussian, quay và tính tỷ lệ - Pivoting and scaling, phương pháp phân ly LU, nghịch đảo ma trận, các hệ chéo bậc 3, phương pháp lặp Jacobi, phương pháp lặp Gauss-Seidel.

28p whocare_d 22-09-2016 118 14   Download

Chương 4 - Các phương pháp cho hàm rời rạc. Chương này trình bày về đa thức nội suy (Polynomial interpolation) và phương pháp bình phương tối thiểu. Nội dung cụ thể gồm có: Nội suy Lagrangian, nội suy Newton, nội suy bậc 3 (Cubic spline interpolation), làm khớp dữ liệu cho các hàm tuyến tính, làm khớp dữ liệu cho các hàm phi tuyến.

24p whocare_d 22-09-2016 99 14   Download

Chương 2 - Giải phương trình đại số phi tuyến. Những nội dungc hính trong chương này gồm: Phương pháp khoanh vùng (Bracketing interval), phương pháp phi đạo hàm (Methods without derivatives), phương pháp đạo hàm (Methods with derivatives).

26p whocare_d 22-09-2016 154 10   Download

Bài giảng Applied numerical methods (Ứng dụng phương pháp tính số) - Chương 1: Tóm lược ngôn ngữ lập trình Fortran 90. Những nội dung chính trong chương này gồm có: Fortran cơ sở, các câu lệnh cơ bản, hàm và thủ tục. Mời các bạn cùng tham khảo.

27p whocare_d 22-09-2016 115 8   Download

In the course of current research the procedure of obtaining of the piecewise linear vibration systems time and frequency responses have been developed. The method is partly analytical and partly numerical and is based on combining of linear solutions of different sections in a cycle of motion. In a row with the method of obtaining of the exact steady state time and frequency response, also it is provided sensitivity analysis of the vibration isolator.

86p runthenight07 01-03-2023 15 3   Download

This thesis investigates the SPH capability available in the commercial Finite Element (FE) code LS-DYNA®, for water impact problems. Experiments have been conducted on rigid wedges impacting water, which were then simulated with the SPH method. Although certain limitations were experienced with the experimental results, a positive correlation was observed with the numerical technique, thus establishing SPH as a promising method for crashworthiness design.

176p runthenight07 01-03-2023 14 3   Download

file:///C:/Users/dangt/Downloads/qhf_2In traditional listening teaching methods in general and, in particular, teaching listening tends to treat students equally. Teachers have tendencies to present the same in-class exercises and activities to all learners and expect the same outcome. In present, with the development of high technology, numerous techniques to teach listening are applied in listening lessons; however, dictation is still a good method to be used to teach listening when it has various implications for educators in terms of classroom instructions.

81p closefriend09 16-11-2021 65 9   Download

The soil-structure interaction problems under seismic loading are researched by numerical and experimental methods. In numerical study, the complication of soil-foundation interaction is simulated by a proposal macro-element.

27p hobbsandshaw 09-06-2021 35 4   Download

Research purposes: We consider some inverse source problems for parabolic equations, focus on three topics: First, we give stability estimates. Second, we propose regularization methods to solve these problems. Third, we set up algorithms and give numerical examples to illustrate the performance of the proposed regularization methods in this thesis.

26p prisonbreak123 21-05-2021 26 4   Download

Although the research direction on NSFD schemes for differential equations have achieved a lot ofresults shown by both quantity and quality of existing research works, real-world situations have always posednew complex problems in both qualitative study and numerical simulation aspects. On the other hand, there aremany differential models that have been established completely in the qualitative aspect but their correspondingdynamically consistent discrete models have not yet been proposed and studied

26p capheviahe29 17-03-2021 33 4   Download