9 research outputs found
Damage estimates from long-term structural analysis of a wind turbine in a U.S. wind farm environment
The Long-Term Inflow And Structural Test Program
The Long-term Inflow and Structural Test (LIST) program is collecting long-term, continuous inflow and structural response data to characterize the extreme loads on wind turbines. A heavily instrumented Micon 65/13M turbine with SERI 8-m blades is being used as the first test turbine for this program. This turbine and its two sister turbines are located in Bushland, TX, a test site that exposes the turbines to a wind regime that is representative of a Great Plains commercial site. The turbines and their inflow are being characterized with 60 measurements: 34 to characterize the inflow, 19 to characterize structural response, and 7 to characterize the time-varying state of the turbine. The primary characterization of the inflow into the LIST turbine relies upon an array of five sonic anemometers. Primary characterization of the structural response of the turbine uses several sets of strain gauges to measure bending loads on the blades and the tower and two accelerometers to measure the motion of the nacelle. Data from the various instruments are sampled at a rate of 30 Hz using a newly developed data acquisition system that features a time-synchronized continuous data stream that is telemetered from the turbine rotor. The data, taken continuously, are automatically divided into 10-minute segments and archived for analysis. Preliminary data are presented to illustrate the operation of the turbine and the data acquisition and analysis system
Trust and tribulation: Racial identity centrality, institutional trust, and support for candidates in the 2020 US presidential election
We examined how racial- ethnic identity centrality, or the importance of race/ethnicity in people’s self- perceptions, affected peoples- support for the Democratic and Republican candidates in the 2020 US election. We explored this association by examining the mediating role of trust in important social institutions. In Study 1, we examined these effects by comparing the pattern of relationships among people of color (POC) and white people, using a sample of 177 Amazon Mechanical Turk (MTurk) participants. In Study 2, we expanded our focus on different racial- ethnic groups, by comparing effects for Black, Latinx, Asian American/Pacific Islander (AAPI), and white participants, using a sample of 530 MTurk workers. Although there were a few findings that ran contrary to our expectations, the two studies generally found that trust in institutions that challenge the status quo, such as the media, explained the relationship between identity centrality and support for candidates among POC, especially Black and Latinx participants. We also found that trust in institutions that uphold the status quo, such as police and courts, explained the relationship between racial- ethnic identity centrality and support for candidates among white people.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/171243/1/asap12256.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/171243/2/asap12256_am.pd