Kara Peterman and I hosted an event for Northeastern’s Young Scholars Program. We taught the students about wind turbine towers and local buckling, using our universal testing machine to precisely measure the conditions at buckling for soda cans stiffened creatively by the students.
Our group just published two new papers — one in Structural Safety on multivariate analysis of wind and wave in the design of offshore wind turbines and another in Renewable Energy on the magnitude and influence of foundation (i.e. soil) damping on the dynamics of offshore wind turbines. You can check them out on my publications page.
Spencer, Sanjay and I have just published a new paper on the variability of breaking wave characteristics and impact loads on offshore wind turbines supported by monopiles. The paper’s conclusions are based on a comprehensive multi-year measurement campaign at the Blyth offshore wind farm off the coast of England.
Ground was broken at MIT’s middleton campus, where Keystone Tower Systems and Northeastern University are installing a 10 kW turbine on a spirally welded tapered tower to demonstrate the viability of this new tower manufacturing process. The anchor cage, which will be embedded in the turbine’s foundation, was just assembled at the STReSS lab (see below) and will ship to site this week.
Last month, we completed our first large-scale test at the STReSS lab — see picture below taken from the overhead crane. The specimen was a spirally welded tube manufactured by Keystone Tower Systems and loaded in pure bending. The hydraulic loading and data acquisition systems both worked perfectly. Next test will be in late October. We are currently adding two laser scanning systems to more accurately characterize imperfections and local buckling. You can read an overview of this project here.
The Department of Energy just announced a $1M grant to Keystone Tower Systems with a subaward to Northeastern. The project will provide a detailed design and certification for a spirally-welded tower supporting a utility-scale wind turbine.
Sanjay, Kai and I have just published a new paper on a method to evaluate the lateral capacity of offshore wind turbines under extreme wind-wave loading.