Blog

In Kinematics, which is the study of motion, there are three key characteristics of any system which describe how this system moves. These are Displacement, Velocity and Acceleration, and they are all vector quantities related to one another. The displacement of an object is how far...

When performing a Modal Analysis (https://www.fea-solutions.co.uk/modal-analysis/), one of the results is the modal mass associated to each natural frequency. It is a measure to judge the significance of a vibration mode, or, in simple terms, how damaging might the deformation of a particular natural frequency...

All linear dynamic analyses https://www.fea-solutions.co.uk/types-of-dynamic-analyses/ except Modal Analysis https://www.fea-solutions.co.uk/modal-analysis/ use modal superposition. This is a mathematical procedure to use results from a Modal Analysis to calculate the effects of dynamic loads on a structure. In simple terms, modal superposition applies loads to the natural frequencies calculated earlier....

Dynamic analyses, rather than static analyses, have to be performed if the load is not constant over time https://www.fea-solutions.co.uk/static-vs-dynamic-analysis/. In the real world, most loads are variable, but nevertheless their effects are simulated by static analyses. For the decision to be made as to whether a dynamic...

Resonance describes the phenomena of amplification that occurs when the frequency of a periodically applied load is very similar or equal to one of the system's natural frequencies. When the required frequency for resonance is met by the external load, the system it is applied...

Modal Analyses are used to find the natural frequencies and their associated modes (deformation shapes) of a structure. The natural frequency is the frequency at which a system vibrates in the absence of external excitations. Modal Analysis automatically applies unit loads, which can't be adjusted by...

For all Dynamic Analyses, the input or output will concern the vibrations of a system. These vibrations will have a characteristic frequency and period associated with them. The Period (T) of the system is the amount of time it takes to oscillate once. The unit used...

There are two groups of dynamic analysis: linear and non-linear. For an overview on the different types of non-linear structural behaviour, please look at our blog: https://www.fea-solutions.co.uk/non-linear-behaviour/ These groups then have their own types of dynamic analysis depending on what is being simulated, what the inputs are,...

When conducting FEA, the decision must be made as to whether a static analysis or a dynamic analysis is required. There are several key differences between the two. A static analysis can only be performed if the system being simulated does not depend on time, and...