Segmented Wind Turbine Rotor Blade Testing with Connection Recesses
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Solution Overview
Problem
The testing of rotor blades for wind turbines is time-consuming and costly, especially for long blades, and often results in overloading sections that can cause damage, leading to costly repairs and interruptions in testing.
Innovation Solution
Divide the rotor blade into segments with a connection interface featuring recesses for tension elements, allowing for separate testing of each segment, which changes their natural frequencies and reduces the risk of overloading, enabling faster and more cost-effective testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire rotor blade is tested as one piece, then the testing is comprehensive, but the testing time is very long and costly
Solution Approach 1:
The rotor blade is divided into multiple segments (first rotor blade component segment and second rotor blade component segment) that can be tested separately. Each segment has its own connection interface with recesses for mounting on the test stand, enabling independent testing that reduces overall testing time while maintaining comprehensive coverage of blade performance
2Reliability
If cyclic forces are applied to the entire rotor blade, then fatigue behavior is tested, but certain sections experience overloading that causes damage
Solution Approach 1:
By segmenting the rotor blade into separate testable portions, the cyclic loading during fatigue testing is distributed more evenly. Each segment can be tested under controlled conditions that apply appropriate fatigue loads without concentrating excessive stress on any single section, thereby preventing overloading damage while still assessing fatigue behavior
3Productivity
If the rotor blade is divided into segments, then testing time is reduced and parallel testing is enabled, but the device complexity increases
Solution Approach 1:
The connection interface design with recesses serves multiple functions: it provides structural attachment points for mounting segments on the test stand, defines the geometric relationship between segments, and enables standardized repetition for parallel testing. This universal interface design reduces overall system complexity despite segmentation by providing a reusable, standardized connection solution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method significantly reduces testing time, minimizes damage from overloading, and allows for parallel testing of other segments without interruptions, thereby reducing overall testing time and costs.
Implementation Method 1
the rotor blade is excited to a natural frequency oscillation by applying the cyclic force at a frequency that corresponds to one of the natural frequencies of the rotor blade
Data Source
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AI summary
The invention relates to a method for testing a rotor blade component of a rotor blade for a wind turbine, comprising: dividing a rotor blade component of a rotor blade for a wind turbine into two, three, or more rotor blade component segments, and providing recesses in a connection interface at a connection end of one of the rotor blade component segments. Furthermore, the invention relates to a rotor blade component segment of a rotor blade for a wind turbine, the rotor blade component segment comprising a connection end formed by dividing a rotor blade component of a rotor blade for a wind turbine into two, three, or more rotor blade component segments, a connection interface at the connection end of the rotor blade component segment, and recesses provided in the connection interface for connecting the rotor blade component segment to a test stand.