Dynamics are important for designs that have to withstand constantly changing loads or are extremely cyclic in nature. Most of these designs cannot be analysed using a spectrum of (pseudo-) static analyses alone. Going into the realm of dynamic analysis, we are confronted with many options. You can trust our Femtec specialists to select the one to best fit the use case of your design.
One of the more basic finite element calculations is the modal analysis. This analysis provides our customers with the natural frequencies occurring in a structure as well as the mode shapes belonging to those frequencies. Interpreting these results is the tricky bit where actual useful information needs to be garnered. Femtec has engineers with the experience to do just that. We are able to extract a response spectrum or transfer function from the modal results, which can greatly enhance insight into the dynamic behaviour of the designs of our customers.
In some ways, direct transient analysis is more limited than modal analysis, while in others it provides extra possibilities. In a direct transient analysis, a design’s response to a certain load signal can be calculated. This is limited to that one load signal per calculation, making an analysis of a whole spectrum of loads more time consuming. However, this method does allow for non-linear calculations such as models which include contact.
Fatigue calculation is the odd duck, as it is usually not classified as a dynamic calculation. For a given load spectrum, Femtec can reliably estimate the fatigue life of any construction. Our special field of expertise for fatigue lies in the calculation of weld fatigue. From model creation fit for accurate stress determination at the weld to the post-processing of a vast amount of load conditions and the interpretation of the results, Femtec has the tools and expertise to provide the required support.