This was a super interesting project. Due to corrosive environment, the steel we used was specially prepared (glazed) which meant… absolutely no welding on site! And with 20m of diameter, this is a challenge for sure!
This meant, that the vessel was designed with 3 layers of steel plates in a checkboard placement, so we could easily bolt the plates together without collisions nor bending in the corners.
Also circumferential rings were bolted, and some additional elements had to be foreseen to avoid empty “spaces” between the ring and the vessel (as well as some plates between them!).
Stability of such a vessel is a very interesting challenge, as can be seen based on the failure mode!
It’s always good to plan ahead. Initially I wanted to do a model of the vessel with each opening and each bolt present in the model. But after one plate was meshed with almost 100k elements, it was obvious that we cannot go this route! Instead we did a simplified overall model (which was still huge and computed for 20h!) and calculated the connections in detailed analysis later on.
The first project we did with Enterfea was a silos design in 2015. Their non-linear FEA analyzes allowed to significantly reduce the costs of that project. Recently with the enormous support and commitment of Enterfea, we did a pressure vessel with imperfections design. Non-linear FEA analyzes allowed to save a project that seemed to be hopeless. The level of complexity and detail of analyzes provided by Enterfea always exceeds my expectations. Łukasz with his knowledge and commitment is a top-class expert in the field of FEA. Having 15 years of experience in the design industry, I can say that at the current level, Enterfea is no longer competing with the competition, they set new standards in the design projects and can only compete with themselves.
We have used Enterfea for a number of large steel tank designs. With the cost of raw materials increasing rapidly, it is vital for our customers that our designs are efficient whilst still being safe and code compliant. This is why Enterfera is so important. The level of detail involved in their complex non-linear analyses provide unrivaled value for money and the service is exceptional – Lukasz goes above and beyond to ensure any queries are answered even after a contract has been completed. His extensive knowledge of FEA gives us peace of mind that value is maximized and risk is mitigated as much as possible in our designs.
We have been working successfully with Enterfea for many years. Enterfea is always a reliable partner for the static design of our conveyor technology. In our current project, we are jointly developing a completely new, statically optimized conveyor system for integration into our standard.
Enterfea is performing all of the designs of silos for us with nonlinear FEA for over 5 years now, and we are very satisfied with the cooperation. Especially since our Customers appreciate the quality of the designs, which leads to more sales for us and no issues with verification of designs by the authorities.