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Name of discipline

Computer mechanics

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Course

3

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Semester of study

5

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Number of credits

5

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Lecturer’s full Name

Candidate of technical Sciences, associate Professor of the Department of theoretical and applied mechanics of mechanics and mathematics of BSU Oleg Gromyko

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Purpose of discipline study

Improving the level of professional competence in solving problems of mechanics in various fields of work.

As a result of studying the discipline, students should:

– to get acquainted with the analytical and numerical methods of solving the problems of mechanics of technical systems, which are the basis of applied systems of automated engineering analysis (CAE),

– to get acquainted with the basics of the finite element method (FEM) and the peculiarities of the software implementation of FEM for personal computers,

– know the basic principles of computer simulation of engineering structures and physical processes and the stages of solving relevant problems;

– to get acquainted with modern applied systems of automated engineering analysis for personal computers: ANSYS, Femap / NASTRAN, Patran, Adams, VisualNastran, Pro / Engineer (Pro/Mechanica), SolidWorks, AutoCAD, CATIA, Invention Machine, TechOptimizer, etc.

– – be able to use computer systems ANSYS, Femap/NASTRAN, SolidWorks, Adams, VisualNastran to solve problems in the theory of elasticity, plasticity, kinematics, dynamics and strength of technical systems and analysis of the physical processes occurring in them.

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Prerequisites

Theoretical mechanics, mathematical analysis, numerical methods, algebra, analytical geometry, continuum mechanics, material resistance, finite element method

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The content of the discipline

An overview of analytical and numerical methods for solving systems mechanics problems. Review of current application of computer-aided engineering analysis (CAE) for personal computers.

Fundamentals of the finite element method. Features of software implementation of finite element method for personal computer-ANSYS, NASTRAN. Processors, file format, databases. The beginning of the treatment. Types of modeling. Solid modeling. Grid construction. Parameterization of models. Direct model generation

The strength of static analysis. Strength dynamic analysis. Dynamics of transients. Modal analysis. Response to harmonic effects. Spectral analysis. Response to random vibration. Analysis of the stability of the structure. Types of analysis by type of nonlinearities. Linear approach. The nonlinear approach. The structural nonlinearity. Nonlinearities of the material behavior. Geometric nonlinearities. Nonlinear element.

Kinematic analysis. Thermal analysis. Stationary thermal conductivity. Nonstationary process. Phase transformation. Thermal analysis. Hydroaerodynamic analysis. Computational fluid dynamics. Movement of the medium in pipelines. Acoustic analysis.

ANSYS, NASTRAN, PATRAN finite element libraries. Table of finite elements. P-elements in the ANSYS package. Postprocessing. Post processors for General purpose programs ANSYS, NASTRAN, PATRAN. The post-processor of history of loading of ANSYS.

The method of substructures. Method submodels. Super-element analysis.

Investigation of the stress-strain state of a flat angle bracket under static loading.

Modal analysis of the aircraft wing.

Ingot solidification in the form of a corner. Nonlinear transient analysis of heat conduction

Laminar and turbulent flow in a two-dimensional expanding channel.

Static analysis of the beam-shell structure.

The analysis of plane trusses subjected to static loads at the nodes. Batch and interactive modes.

The use of the P-method for calculation of a plate with a hole. Solid modeling.

Modal analysis of the construction sector subject to cyclic symmetry. Special technique for solving problems of modal analysis for structures subjected to cyclic symmetry.

Analysis of the stress-strain state of the cantilever beam with a feature using the method of substructures.

Calculation of flat frames under static load. Batch and interactive modes.

The calculation of straight bars under torsion. Calculation of rods with curved axis. Batch and interactive modes

Features of the use of computer simulation systems kinematics and dynamics of machines and mechanisms Adams, VisualNastran. Motion simulation. Analysis of initial conditions. Kinematic and dynamic analysis. Static and quasi-static analysis

Get started and start the ADAMS program. Main toolbox (main toolbar). General-purpose tools and view control (Select, Undo, Color tools). Construction of body geometry (rigid body tool). A connection between the bodies (Joint Motion tools and generators). Setting forces and flexible connections (Forces tools). Model analysis. Modeling (Simulation tool). Analysis of the model by plotting (Measures, Plotting tools and Adams/Postprocessor module).

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Recommended literature

1.Nasedkin A.V. Finite element modeling based on ansys. programs for solving static problems of resistance of materials with variants of individual tasks. Rostov-on-Don, 1998.

2. Kaplun A. B., Morozov E. M., Shape E. A. ANSYS in the hands of the engineer. Practical guide. Moscow, 2003.

3. Chigarev A.V., Kravchuk A. S., Smalyuk A. F. ANSYS for engineers. Reference book. Moscow: Mechanical Engineering, 2004.

4. Basov K. A. ANSYS in examples and problems. . Moscow, 2002.

5. M. A. Zhuravkov, S. A. Glyakov, O. V. Gromyko, D. G. Medvedev. Computer mechanics. Dynamic and kinematic analysis of mechanical systems: a course of lectures. – Minsk: BSU, 2006. – 375 p.

6. Zhuravkov M. A. Mathematical modeling of deformation processes in solid deformable media. Meganewton.: BSU, 2002. 456 p.

7. Makarov E. G. Engineering calculations in MathCAD. Training course. SPb.: Peter, 2003 448 p.

8. Shimkovich, D.G. Calculation of designs in MSC.NASTRAN for Windows. Moscow: DMK, 2004. 704 p.

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Teaching method

Problematic, dialogue-heuristic, visual, method of formation of personal importance of knowledge

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Language of education

Russian

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Conditions (requirements, ongoing monitoring)

-Testing;

– Performance of individual tasks.

Assessment on examination is exposed taking into account:

15% – testing, 15% – performance of individual tasks, 10% – work in practical classes, 60% – written response to the exam (solving computer modeling problems)

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Current certification form

Credit