ANSYS一种结构瞬态分析实例
软件: ANSYS
ANSYS Transient Analysis of a PlateArch Structure: A Detailed Guide
Objective:
To deepen understanding of the dynamic behavior of composite structures under transient nonstationary loading conditions by utilizing ANSYS's transient analysis capabilities.
Introduction:
The experiment focuses on analyzing the steadystate transient response of a composite structure consisting of a plate and arch (referred to as an "Lissajous" structure in this context) under timevarying loading conditions. The specific scenario involves applying a load that changes sinusoidally with time uniformly distributed over the plate's surface. The analysis is conducted in ANSYS through a detailed sequence of steps, offering insights into the effective modeling of complex dynamic interactions in structures.
Absolute Setup of Parameters:
Components considered in this analysis are characterized as follows:
Material Properties: A3 steel is chosen with the following properties:
Young's modulus \(E = 2 \times 10^{11} Pa\)
Poisson's ratio \(v = 0.3\)
Density \(\rho = 7.8 \times 10^3 kg/m^3\)
Geometry Parameters:
Plate (Shell Unit):
Thickness \(t = 0.02 m\)
Overall dimensions not explicitly mentioned, but relevant to shell unit configuration.
Arch (Beam Unit):
Crosssectional area \(A = 2 \times 10^{4} m^2\)
Inertial properties \(I_{zz} = I_{yy} = 2 \times 10^{8} m^4\)
Dimensions: Width \(w = 0.01 m\), Height \(h = 0.02 m\)
StepbyStep Detailed Procedure:
Step 1: Establishing the Analysis Title
Initiating the transient analysis process in ANSYS by setting a title that encapsulates the objectives.
Utilizing the Utility Menu > File > Change Title interface.
Inputting the appropriate title: "Transient Analysis of the Structure".
Step 2: Defining Computational Units
Selecting the SHELL63 element type for plate modeling.
Identifying the BEAM4 unit for arch representation.
Step 3: Specifying Material Properties
Shell Element Constatnts: Inputting the thickness attribute for the plate, acknowledging that only the fundamental parameter is required (shell thickness).
Step 4: Defining Beam Element Constants
Inputting key beam characteristics: area \(A\), inertial properties \(I_{zz}\), \(I_{yy}\), dimensions of width \(w\) and height \(h\).
Step 5: Application of Fundamental Material Properties
Defining essential parameters for a comprehensive transient analysis setup: Young's modulus \(E\), Poisson's ratio \(v\), density \(\rho\).
Step 6: Constructing the Finite Element Model
Geometry Generation: Creating a rectangular domain \((x1=0, x2=2; y1=0, y2=1)\).
Keypoint Duplication: Associating points in the Z dimension, translating them accordingly for model representation.
Morphology Construction: Establishing the structure’s morphology, ensuring precise connectivity between nodes to form the plate and arch.
Mesh Refinement: Applying finer meshing along fractures, utilizing attributebased configuration for segmentation of the model into manageable elements.
Step 7: Conducting Transient Dynamics Analysis:
Initiation using Main Menu > Solution > New Analysis and specifying transient dynamics as the regime of observation.
Applying Constraints: Identifying and fixing nodes (232, 242, 252, 262) through displacement control on nodes.
List Manipulation: Utilizing the Utility Menu > Select > Everything option to enhance computational review efficiency.
Step 8: Configuring Load Analysis Parameters:
Defining the DataBase and Results File Writing conditions and setting the file write frequency to capture transient dynamics effectively.
Setting Time Parameters: Calculating the time necessary for the transient load to pass from 1s to 6s, specifying time steps of 0.2s with a ramped loading transition.
Step 9: Load Application and Stepping:
Applying loading conditions through loads, pressure, and time intervals, updating through different load step files, each representing a distinct time phase of the transient loading rate.
Step 10: Solution Execution
Loading Sequences: Sending the computational model through the procedure `main_menu_solution_solve_from_LS_file` to obtain results, specifically focusing on the dynamic response.
Step 11: Post Processing:
Evaluation of Transient Response: Utilizing `timeHist_postpro` tools to characterize specific parameters (e.g., displacement UZ146 at node 146) over time, visualizing adaptive dynamic interactions.
Conclusion:
This comprehensive ANSYS transient finite element analysis showcases meticulous modeling, parameter identification, and computational execution. The methodologies employed allow for a precise understanding of how composite structures behave under timevarying loading conditions, providing insights into the dynamic response analysis within engineering contexts. The presented script serves as a practical guide for those aiming to replicate and expand upon the analysis, offering a stepbystep approach to conducting complex structural dynamics studies using ANSYS.
Objective:
To deepen understanding of the dynamic behavior of composite structures under transient nonstationary loading conditions by utilizing ANSYS's transient analysis capabilities.
Introduction:
The experiment focuses on analyzing the steadystate transient response of a composite structure consisting of a plate and arch (referred to as an "Lissajous" structure in this context) under timevarying loading conditions. The specific scenario involves applying a load that changes sinusoidally with time uniformly distributed over the plate's surface. The analysis is conducted in ANSYS through a detailed sequence of steps, offering insights into the effective modeling of complex dynamic interactions in structures.
Absolute Setup of Parameters:
Components considered in this analysis are characterized as follows:
Material Properties: A3 steel is chosen with the following properties:
Young's modulus \(E = 2 \times 10^{11} Pa\)
Poisson's ratio \(v = 0.3\)
Density \(\rho = 7.8 \times 10^3 kg/m^3\)
Geometry Parameters:
Plate (Shell Unit):
Thickness \(t = 0.02 m\)
Overall dimensions not explicitly mentioned, but relevant to shell unit configuration.
Arch (Beam Unit):
Crosssectional area \(A = 2 \times 10^{4} m^2\)
Inertial properties \(I_{zz} = I_{yy} = 2 \times 10^{8} m^4\)
Dimensions: Width \(w = 0.01 m\), Height \(h = 0.02 m\)
StepbyStep Detailed Procedure:
Step 1: Establishing the Analysis Title
Initiating the transient analysis process in ANSYS by setting a title that encapsulates the objectives.
Utilizing the Utility Menu > File > Change Title interface.
Inputting the appropriate title: "Transient Analysis of the Structure".
Step 2: Defining Computational Units
Selecting the SHELL63 element type for plate modeling.
Identifying the BEAM4 unit for arch representation.
Step 3: Specifying Material Properties
Shell Element Constatnts: Inputting the thickness attribute for the plate, acknowledging that only the fundamental parameter is required (shell thickness).
Step 4: Defining Beam Element Constants
Inputting key beam characteristics: area \(A\), inertial properties \(I_{zz}\), \(I_{yy}\), dimensions of width \(w\) and height \(h\).
Step 5: Application of Fundamental Material Properties
Defining essential parameters for a comprehensive transient analysis setup: Young's modulus \(E\), Poisson's ratio \(v\), density \(\rho\).
Step 6: Constructing the Finite Element Model
Geometry Generation: Creating a rectangular domain \((x1=0, x2=2; y1=0, y2=1)\).
Keypoint Duplication: Associating points in the Z dimension, translating them accordingly for model representation.
Morphology Construction: Establishing the structure’s morphology, ensuring precise connectivity between nodes to form the plate and arch.
Mesh Refinement: Applying finer meshing along fractures, utilizing attributebased configuration for segmentation of the model into manageable elements.
Step 7: Conducting Transient Dynamics Analysis:
Initiation using Main Menu > Solution > New Analysis and specifying transient dynamics as the regime of observation.
Applying Constraints: Identifying and fixing nodes (232, 242, 252, 262) through displacement control on nodes.
List Manipulation: Utilizing the Utility Menu > Select > Everything option to enhance computational review efficiency.
Step 8: Configuring Load Analysis Parameters:
Defining the DataBase and Results File Writing conditions and setting the file write frequency to capture transient dynamics effectively.
Setting Time Parameters: Calculating the time necessary for the transient load to pass from 1s to 6s, specifying time steps of 0.2s with a ramped loading transition.
Step 9: Load Application and Stepping:
Applying loading conditions through loads, pressure, and time intervals, updating through different load step files, each representing a distinct time phase of the transient loading rate.
Step 10: Solution Execution
Loading Sequences: Sending the computational model through the procedure `main_menu_solution_solve_from_LS_file` to obtain results, specifically focusing on the dynamic response.
Step 11: Post Processing:
Evaluation of Transient Response: Utilizing `timeHist_postpro` tools to characterize specific parameters (e.g., displacement UZ146 at node 146) over time, visualizing adaptive dynamic interactions.
Conclusion:
This comprehensive ANSYS transient finite element analysis showcases meticulous modeling, parameter identification, and computational execution. The methodologies employed allow for a precise understanding of how composite structures behave under timevarying loading conditions, providing insights into the dynamic response analysis within engineering contexts. The presented script serves as a practical guide for those aiming to replicate and expand upon the analysis, offering a stepbystep approach to conducting complex structural dynamics studies using ANSYS.
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