Learning Abaqus is an important means for engineering technicians, researchers, and students in related fields to enhance their professional capabilities, solve practical problems, and promote technological innovation. It plays an irreplaceable role in various fields such as engineering design, scientific research, and education. This article will introduce structural dynamics analysis methods and the basic modules and operating procedures of Abaqus, hoping to provide relevant theoretical assistance for learners.
Overview of Structural Dynamics Analysis Methods
Structural Dynamics Analysis
Modal Analysis
By solving the eigenvalue problem, the natural frequencies and mode shapes of the structure are determined, which is used to understand the free vibration characteristics of the structure. Time History Analysis Direct numerical integration of the motion equations to calculate the response of the structure under time-varying loads, suitable for nonlinear systems and transient response analysis.
Frequency Domain Analysis
Analyzing the structure’s response to harmonic loads in the frequency domain, commonly used methods include Fourier Transform and Frequency Response Function analysis.
Response Spectrum Analysis Utilizing response spectra to estimate the maximum response of structures under random loads such as earthquakes, suitable for seismic design.
Random Vibration Analysis
Analyzing the statistical characteristics of structures under random loads (such as wind and earthquakes), commonly described by power spectral density functions for loads and responses. Finite Element Method Discretizing the structure into finite elements to establish a numerical model for dynamic analysis, suitable for complex geometries and boundary conditions.
Multibody Dynamics Analysis
Studying systems composed of multiple rigid or flexible bodies, considering the interactions and movements between components.
Substructure Analysis
Decomposing complex structures into multiple substructures, analyzing each separately, and then synthesizing, suitable for large complex systems.
Basic Modules and Operating Procedures of Abaqus
Abaqus Basic Modules and Operating Procedures
Basic Modules of Abaqus
♦ Abaqus/CAE (Complete Abaqus Environment)
Function: Abaqus/CAE is the pre- and post-processing module of Abaqus, used for model creation, editing, job submission, and result post-processing.
♦ Abaqus/Standard
Function: A solver based on implicit integration algorithms, suitable for solving static, quasi-static, linear dynamic, and nonlinear problems.
♦ Abaqus/Explicit
Function: A solver based on explicit integration algorithms, suitable for transient dynamics, impacts, explosions, and other high-speed nonlinear problems.
♦ Abaqus/CFD
Function: Used for computational fluid dynamics (CFD) analysis, simulating fluid flow, heat transfer, and turbulence issues.
♦ Abaqus/ATOM
Function: Used for topology optimization, helping design lightweight structures.
♦ Abaqus/Viewer
Function: Specifically for result post-processing, visualizing analysis results.
Basic Operating Procedures of Abaqus
☛ Geometry ModelingIn the Part module, create geometric models, supporting the import of CAD files or direct drawing of geometries.☛ Material DefinitionIn the Property module, define material properties (such as elastic modulus, Poisson’s ratio, etc.) and assign them to geometries.☛ AssemblyIn the Assembly module, assemble multiple components into a complete model.☛ Analysis Step SettingsIn the Step module, define the type of analysis (such as static, dynamic) and time step size.☛ Load and Boundary ConditionsIn the Load module, apply loads (such as forces, pressures) and boundary conditions (such as fixed constraints).☛ Mesh GenerationIn the Mesh module, perform meshing on geometries to generate finite element models.☛ Job SubmissionIn the Job module, create and submit jobs, selecting the solver (Standard or Explicit).☛ Result Post-ProcessingIn the Visualization module, view analysis results such as stress, strain, displacement, etc.So, how can we quickly get started with learning Abaqus software?Here, I would like to recommend to everyone the course “Abaqus from Beginner to Expert – Theory and Engineering Application of Large Finite Element Programs (64 hours)”! The course aims to help students quickly master the core functions and application skills of Abaqus software through systematic teaching. The course content is practice-oriented and carefully designed with 13 engineering examples, allowing students to learn the complete workflow of Abaqus through examples.
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Course Introduction
This course mainly explains Abaqus simulation engineering examples, divided into 29 lectures, covering the minimum potential energy principle, finite element method for plane problems, three-dimensional problems and element selection, axisymmetric problems and inp files, finite element method for shell problems, material nonlinear problems, geometric nonlinear problems, contact nonlinear problems, dynamic problems…The course totals 12h54min, guiding you to comprehensively learn and master Abaqus software operations~
Overview of Course Knowledge Points
1. Lecture Content (32 hours)Introduction
Introduce the basic concepts, development history, and applications of finite element analysis in engineering.
Minimum Potential Energy Principle
Explain the minimum potential energy principle and its application in the finite element method, focusing on the variational principle and weak forms.
Finite Element Method for Plane Problems
Discuss modeling and solving two-dimensional plane problems, covering plane stress, plane strain, and their finite element discretization methods.
Three-Dimensional Problems and Element Selection
Explore finite element analysis for three-dimensional problems, with a focus on how to select suitable element types for modeling.
Axisymmetric Problems and inp Files
Introduce modeling and solving axisymmetric problems, and explain the inp file format and writing techniques in ABAQUS in detail.
Finite Element Method for Shell Problems
Explain the finite element modeling methods for shell structures, covering thin plate theory, shell element selection, and their analysis applications.
Material Nonlinear Problems
Introduce simulation methods for material nonlinear behavior, focusing on the application of material models such as plasticity, creep, hyperelasticity, and viscoelasticity.
Geometric Nonlinear Problems
Discuss modeling and solving geometric nonlinearity (such as large deformations and large deflections), focusing on large displacement and large strain analysis methods.
Contact Nonlinear Problems
Explore nonlinear problems in contact analysis, covering contact definitions, contact algorithms, and the calculation and optimization of contact forces.
Dynamic Problems
Introduce structural dynamics analysis, focusing on modal analysis, frequency response analysis, time history analysis, etc., in finite elements.
2. Hands-on Practice (32 hours)
Modeling of Lightweight Cargo CraneUse finite element software to perform geometric modeling and meshing for a lightweight cargo crane.Load Analysis of Lightweight Cargo CraneAnalyze the load on the lightweight cargo crane, calculating its stress and deformation under different working conditions.Abaqus Periodic Boundary Conditions Application (Unidirectional Fiber Composite Unit) Lecture 1Use Abaqus to simulate the periodic boundary conditions of unidirectional fiber composite units, explaining the modeling and solution methods for periodic structures.Abaqus Periodic Boundary Conditions Application (Unidirectional Fiber Composite Unit) Lecture 2Further explore the simulation of periodic boundary conditions for unidirectional fiber composite units, focusing on the mechanical behavior of composites.Abaqus Periodic Boundary Conditions Application (Unidirectional Fiber Composite Unit) Lecture 3Continue to explain the periodic analysis of unidirectional fiber composite units, discussing stress distribution under different loading conditions.Small Panel Experiment (Verifying the Convergence of Non-Conforming Elements)Verify the convergence of finite element meshes through small panel experiments, focusing on the convergence of non-conforming elements under different mesh sizes.Pressure Analysis of Flat Top Dome Structure (Axisymmetric Problem)Perform pressure analysis on the flat top dome structure, applying ABAQUS for solving and result analysis.Stress Concentration Analysis of Large Support Structure with Openings
Conduct stress concentration analysis on the large support structure, studying the impact of openings on the structural mechanical performance.
Forced Vibration Analysis of Flat Plate Model Lecture 1
Perform forced vibration analysis on the flat plate model, studying the vibration response under external excitation.Forced Vibration Analysis of Flat Plate Model Lecture 2Continue the forced vibration analysis of the flat plate model, exploring vibration characteristics under different boundary conditions.Abaqus Simulation of Car Hub Modal Analysis
Use ABAQUS for modal analysis of the car hub, solving its natural frequencies and mode shapes.
Fatigue Crack Growth of Pre-Cracked XFEM Under Cyclic LoadingApply the extended finite element method (XFEM) to analyze the fatigue crack growth of pre-cracked specimens, studying crack behavior under cyclic loading.Abaqus Use of dload Subroutine to Simulate Moving LoadsSimulate the response of structures under moving loads using the dload subroutine in ABAQUS.Abaqus Tool Cutting Template SimulationUse ABAQUS to simulate the tool cutting process, analyzing the mechanical behavior during the cutting process.Abaqus Simulation of Tire CompressionPerform finite element analysis of the tire compression process, studying the deformation and stress distribution of the tire under different loads.Abaqus Simulation of Stress Wave Propagation in MaterialsSimulate the propagation of stress waves in materials using ABAQUS, analyzing the characteristics of wave propagation.Abaqus Simulation of Cable Bending
Analyze the bending process of cables using ABAQUS, discussing bending deformation and stress concentration issues.
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