Structural Dynamics and Vibration Technology
In this training you learn to analyze the vibration behavior of your product with simulation to obtain targeted information on damping, strength, and structure-borne noise. This training is offered as a 3-day course or alternatively as a self-paced eLearning course.
Duration
3 days
Prerequisites
Basic knowledge of Ansys Mechanical
Software used
Ansys Mechanical
- Recognizing vibration problems with FEM as early as the conception phase
- Best practice for recommended structural dynamic approaches
- Selecting analysis types based on the problem: modal, frequency response, transient
- Vibration analysis of case studies from engineering practice
Description
In this training, you will learn how to simulate the dynamic behavior of your products with Ansys Mechanical. With simulation models, you can make fundamental decisions and reduce vibrations in the development stage. This is more efficient than experimental testing. We also address issues related to strength and structure-borne sound. You will learn how to analyze and compare the structural dynamic performance of your designs. You will find out how to check your ideas for change in the conception phase and discuss the key influencing factors.
We will go through the recommended structural dynamics solutions step by step using selected practical examples. You will learn how to choose the appropriate structural dynamic solver depending on the type of excitation (modal analysis with/without prestressing, frequency response analysis, transient analysis). We will practice the core aspects of damping in Ansys and you will also learn how to conduct vibration studies on complex assemblies.
This course is ideal for project managers, decision-makers, calculation engineers, simulation engineers, and design engineers who want to simulate the structural dynamic behavior to analyze aspects such as function, strength, or structure-borne noise.
Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.
Detailed agenda for this 3-day training
Day 1
01 Introduction to structural dynamics analysis in Mechanical
- Important concepts in structural dynamics: Frequency, period duration, etc.
- Equation of motion
- Understanding or rediscovering the Ansys Mechanical interface
- Demonstrator: Setting up a simple transient vibration analysis
- Exercise: Measuring and recalculating the frequency of a transient vibrating ruler
02 Fundamental dynamic properties – Natural Frequencies and Mode shapes
- Calculating free vibrations
- Estimating natural frequency: Single-mass system
- Equation of motion for N degree of freedom
- The significance of eigenvalues, eigenvectors, and their standardization
- Modal analysis in Ansys Mechanical
- Demonstrator: Ruler modal analysis
- Exercise: Modal analysis of a rear axle
03 Suitable modeling for dynamic analysis
- Important modeling aspects for dynamic properties
- Substitute masses, supports, mesh settings
- Handling large models
- Comparison with measurements
- Selecting the modal analysis solver in Ansys Mechanical
- Extracting important information from the solver output
- Exercise: Modal analysis of a real pedestrian bridge
04 Vibrations of prestressed structures
- Demonstrator: Vibrating guitar string
- Prestress influence on results
- Setting up prestressed modal analyses
- Prestressed frequency response analysis
- Results combination: Statics + dynamic properties
- Consistent linearization: “Perturbation Method”
- Demonstrator: The impact of prestress on the eigenfrequency of a pedestrian bridge
- Exercise: Effect of preload on a centrifugal brake
Day 2
05 Harmonic analysis – dynamic structural response to periodic excitations
- Deformation and stress as harmonic results
- Base equation and transfer function for harmonic vibration
- Analysis via “modal superposition” and “full harmonic”
- Excitation for harmonic analysis in Mechanical
- Best practice tips for analysis settings: Clustering, output control
- Evaluation: Amplitude, phase, and frequency response
- Exercise: Jumping people on a pedestrian bridge
06 Simulation of a shaker test – stress analysis
- Shaker excitation: Base point excitation in Ansys Mechanical
- Advanced evaluation options in harmonic analysis
- A brief introduction to High Cycle Fatigue (HCF) in accordance with the stress concept
- Determining the relevant results for strength evaluation
- Demonstrator: Applying base point excitation
- Exercise: Strength evaluation for a test body
07 Compact damping in 90 minutes
- When does damping need to be considered and when is it unimportant?
- Observations for damping in fixed materials
- Damping variables in computation
- The basics of the damping model in Ansys Mechanical
- Exercise: Damping concepts for a rotation machine
08 Transient arbitrary dynamic analysis
- Non-linear and linear transient analysis
- The time integration method
- Solver control
- Tips for time step control
- Defining transient load signals
- Exercise: Determining the load on a power hammer using transient analysis
Day 3
09 Harmonic acoustic analysis of a pump
- Applying imbalance forces
- Investigating non-sinusoidal loads using DFT (Discrete Fourier Transformation)
- A brief introduction to acoustics: The power of structure-borne noise as a by-product of frequency response analysis
- Demonstrator: Defining a rotating force and structure-borne noise evaluation
- Exercise: Simulating and improving the acoustic behavior of a radial piston pump
10 Dynamic superelements - saving time through reduction of substructures
- Background on Component Mode Synthesis (CMS)
- Tips for modular model design
- Dynamic reduction of individual components
- Creation of superelements according to Craigh-Bampton
- Substructuring: Top-Down and Bottom-Up
- Example: Dynamic response of a machine tool
- Example: Simulation of a spindle component using the bottom-up method
11 Advanced topics from vibration engineering
- Performance of damped modal analysis
- Application areas of asymmetric modal analysis
- Outlook on fluid-structure interaction (FSI) in vibration calculations with coupled fluid
- Demonstrator: Modal analysis of a container filled with water
- Outlook on rotor dynamics calculations for rotating structures
- Demonstrator: Campbell diagram for a Laval rotor
- Friction as a cause of vibrations
- Exercise: Squeaking beam on rotating disk
12 Introduction to Spectral Analysis
- PSD analysis - Calculation of randomly excited oscillations
- Response spectrum - Efficient calculation of transient processes
- Demo: Earthquake simulation using response spectrum analysis
Your Trainers
A selection of our lecturers, who provide you with the latest simulation knowledge and its implementation in practice
Peter Leichsenring
Mike Feuchter
Dr.-Ing. Ulrich Stelzmann
Dr.-Ing. Giampaolo Franzoso
Dr. Ing. Benoit Fontenier
Ian Turner
Placement in the CADFEM Learning Pathway
Participant data
Additional information
Commentary
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If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.
Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT).
To get a clear impression of our online learning format, we offer you a trial allowing you access to the starting module of an eLearning course of your choice. No costs, no cancellation period or anything similar. Moreover, with this free test access you can check all the technical requirements for a smooth learning process. You can easily request the free module from any eLearning course.
Each online course day comprises four eLearning modules. You should ideally allow 90 to 120 minutes of uninterrupted learning time for each module. This will allow you to acquire the knowledge provided by a module and to consolidate it through quiz questions and Ansys exercises. By dividing each module into micro learning units, you can also make good use of smaller time windows, such as on your commute.
Prerequisite for the use of the eLearning courses is the use of a personalized access to the CADFEM learning platform. When purchasing an eLearning course, access to the learning platform is 365 days. As a subscription user, access to the learning platform starts and ends with the start and end of the flat rate. With the start of a further learning product (Learning Subscription, training, eLearning), access to your content is extended by 365 days.