TOP-HOST: Optimization of hyperbolic lattice structures for onshore wind turbines

Building on preliminary research regarding the load-bearing behavior of hyperbolic lattice towers, we are in the process of developing material-optimized structures for turbine towers with a capacity of 5MW and above. These structures offer a combination of several advantages. Lattice towers and tubular towers are commonly employed as supporting structures for wind turbines. In Germany, tubular towers are predominantly used due to their quick assembly times and high labor costs. However, their economic feasibility becomes limited with larger hub heights. The increasing hub heights for low-wind turbines create a substantial demand for structurally efficient and economically viable solutions for towers exceeding 140m in height.

The research project focuses on establishing a fully digital-parametric planning workflow, encompassing all steps from structural design to production while considering the specific requirements of the turbine and its location.

Apart from reduced material consumption and the ability to reach greater heights, the development also promises simplified transportation and assembly processes, along with enhanced self-stabilization during assembly. The open cross-section of the structure results in flow resistance, contributing to significantly reduced dynamic loads and less material fatigue in both the tower and rotor blades. In terms of recyclability, the utilized standard steel profiles can be easily repurposed.

The project is being conducted in close collaboration with various partners from the wind energy and steel production sectors, with a focus on practical solutions for straightforward and swift assembly. The initial results of preliminary tests on the performance of the structure will be presented at the "2022 Annual Symposium of the International Association of Shell and Spatial Structures."