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Static & Dynamic FEA

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Static & Dynamic Finite Element Analysis (FEA) for Product Design

Finite element analysis (FEA) is a numerical method for predicting structural behaviour of mechanical systems. Its widespread use is due to its versatility in modelling complex geometries and performing various types of analyses that provide insights into design structural behaviour. For clients at Resonant Engineering, FEA delivers the confidence needed to design products that meet safety, reliability, and performance standards.

Static and dynamic FEA are two groups of analyses for evaluating how designs perform under different loading conditions.

  • Static analysis simulates responses to steady, unchanging loads.
  • Dynamic analysis evaluates how components respond to time varying loads, often in the form of vibration excitation.

 

Resonant Engineering’s Finite Element Analysis services allow you to gain clear understanding of your product’s behaviour in the design stages, before manufacturing begins. This will help you avoid costly design iterations and achieve efficient, optimized designs.

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What is Static Finite Element Analysis (Static FEA)

Static FEA simulates the behaviour of a structure under steady, unchanging loads. In practice, this includes loads applied slowly enough so that the dynamic effects caused by the load application are negligible. The static analysis is fundamental for understanding stresses and displacements within the system.

Depending on the system’s complexity, static analysis may be either linear or non-linear.
  • Linear Static Analysis is suitable for linear systems where deformations are small, material properties remain constant under applied load and there is no contact between multiple bodies. Linear static FEA is computationally efficient, making it ideal for early design stages where rapid structural optimization, material selection, and feasibility studies are key.

     

  • Non-linear Static Analysis may be necessary when material properties change with applied load, deformations are large and/or contact interactions between multiple bodies must be considered. This type of analysis delivers deeper insights into complex physical behaviour, but requires more computational resources, making it more suitable for advanced design stages where knowledge of accurate, detailed responses are critical.

Static FEA is fundamental in most product designs. With Resonant Engineering’s expertise, you will receive actionable insights that drive informed decision making, reduce development costs, and support robust, reliable product development.

Dynamic Finite Element Analysis (Dynamic FEA)

Dynamic FEA simulates how structures respond to loads that change over time. Unlike static FEA, dynamic analysis accounts for inertia and damping effects, making it essential for systems experiencing vibration, oscillation, impact, or other time dependent effects.

There are several types of dynamic analysis, some also suitable for non-linear systems. However, in many practical applications, applying dynamic analysis to linear systems provides sufficient insights to guide effective design decisions.  

Modal Analysis

  • Modal Analysis is a fundamental dynamic analysis used to identify natural frequencies and mode shapes of structures. Understanding these characteristics is crucial for designing products that do not suffer from high vibration due to resonances. The modal analysis is applicable to linear system, which for almost all practical purposes is sufficient. However, the extension to non-linear systems is also possible.

Harmonic Analysis

  • Harmonic Analysis assesses how structures respond to steady state periodic excitation. This analysis provides displacement, stress and other characteristics expressed as a function of frequency. The harmonic analysis is only possible for linear system (which is often sufficient), although the extension to non-linear systems is possible using harmonic balance method.

Full Transient Analysis

  • Full Transient Analysis simulates detailed time domain responses to any time dependent loads, including periodic, transient and impact excitation. It is the most general type of dynamic analysis which results in displacement, stresses and other characteristics expressed directly as a function of time. The analysis is fully applicable to both linear and non-linear systems.

Response Spectrum Analysis

  • Response Spectrum Analysis estimates the peak response of structures subjected to short, transient dynamic events, such as ground motions. This method, typically used in civil engineering for seismic studies, is limited to linear systems and provides only maximum values of displacements, stresses, and other characteristics.

Random Vibration Analysis

  • Random Vibration Analysis evaluates structure performance under random or stochastic excitation. Since the input excitation is statistical in nature, so are the output responses such as displacements, stresses, and other characteristics. The analysis is restricted to linear systems only.

Rotordynamics

  • Rotordynamics focuses on rotating machinery, accounting for unique effects like gyroscopic forces and mode shape directivity caused by rotation. Rotordynamics FEA extends the applicability of dynamic analyses to rotating systems, providing insights into critical speeds (natural frequencies), mode shapes, displacements, stresses, and other structural characteristics.

For many structures, dynamic behaviour is just as important as static response. With Resonant Engineering’s expertise in vibration and dynamic analysis, you will receive actionable insights that enable informed decision making, low development costs, and ensure the creation of robust, reliable products.

Why Choose Resonant Engineering for Finite Element Analysis?

Choosing Resonant Engineering means collaborating with a team committed to your success. We offer more than just software expertise we provide in-depth knowledge in interpreting results, selecting the appropriate analysis methods, and turning findings into actionable recommendations.

Whether you’re refining a new product or validating a critical design, our static & dynamic FEA services deliver the clarity and precision you need to navigate complex design challenges. With our expertise, you can confidently move forward in your product development journey, knowing your designs are backed by solid analysis.

Testimonials

What Our Clients Say?

Working with Resonant Engineering has greatly improved our machining fixtures. Their expert structural analysis led to design modifications that enhanced both strength and durability. Thanks to their solution, we now enjoy better precision, repeatability, and consistent performance. We highly recommend Resonant Engineering for their outstanding technical support.
JanuaryREONTECH CZ, Product manager
Vaclav has been and is a huge asset to our development team. His understanding and expertise in vibration control have been invaluable. He saved us £1000s by developing in-house testing capabilities which are bespoke to our specific need. On top of that he provides superb advice and analysis that is helping us develop class leading products
TheoDirector, Stack Audio
I contracted Vaclav to conduct FEA on a set of aluminium sculptures for me. He presented the results in a very clear manner and was highly communicative throughout the project, more than happy to address any concerns I had or further explain certain aspects or assumptions in the analysis. Vaclav is a consummate professional and highly qualified expert in his field. I'd highly recommend him to others seeking similar work to be completed.
LucasStructural Engineer has a self-employed contract via Upwork.
In general, I was quite pleased with the work done by Resonant Engineering. Vaclav did a great job and got me helpful data, which made a huge difference in the simplification of the design of my aquarium stand. Vaclav is rather easy to talk to, as he is very industrious and perceptive of certain details. Vaclav quickly grasped what I was looking for in my project and produced very good work.
Jacob S.CEO @ Blue Zone Aquarium Inc