Vibration Analysis for Turbines
Optomet laser Doppler vibrometers enable precise, non-contact measurement of turbine blade vibrations under a range of load and temperature conditions. These measurements help detect resonance issues at an early stage and provide essential modal parameter data that enables engineers to predict fatigue life and optimize maintenance intervals. By providing insight into vibration characteristics, our technology helps improve turbine efficiency and safety while extending service life in demanding aerospace environments.
Turbojet engines have become an indispensable part of aircraft in modern aviation. Ongoing development is focused on improving flight safety, turbine efficiency, overall operating performance and noise emissions.
The individual turbine blade is one of the most critical components of a turbojet engine. A turbine blade's behavior under different loads and at different temperatures affects the engine's overall performance.
One way to better estimate the fatigue life of a blade is the "Low Cycle Fatigue" (LCF) measurement method, in which the turbine is examined before and after repeated cyclic loads. Fatigue caused by thermal stress is examined in more detail using "Thermomechanical Fatigue" (TMF) methods at temperatures of up to 1000°C. Model calculations of the blade geometry are used to optimize damping properties and flow behavior and to suppress unwanted resonances.
Optomet laser Doppler vibrometers provide a reliable means of measuring blade operating vibrations without contact before, after and during loading and heating phases. Understanding the vibration characteristics makes it possible to determine modal parameters and validate model predictions. Changes in these characteristics under different loads allow users to predict the turbine's expected service life under real operating conditions. The results are therefore important for determining turbine maintenance intervals and estimating potential turbine service life under overload conditions—for example, when the remaining turbine must operate well above its normal load to compensate for the failure of another aircraft engine.
Scanning laser vibrometer systems offer particular advantages for this method by enabling fast and straightforward characterization of operational deflection shapes across the blade surface.
Thanks to the high signal strength and signal quality of Optomet laser Doppler vibrometers, the measurement surfaces no longer require any special treatment or preparation. Vibration parameters can be measured precisely even on glowing and poorly reflective objects.
Precise Modal Analysis of a Turbine Blisk Using Laser Doppler Vibrometers
The SMART Scan+ from Optomet captures vibrations across entire surfaces for fast and reliable modal analysis, which is particularly useful in industries such as aerospace. This high-precision system enables detailed analysis of the vibration characteristics of aircraft components by accurately determining their modal parameters.
With SMART Scan+, developers and engineers can characterize the vibration modes of components such as turbine blades quickly and accurately. This plays a key role in evaluating and optimizing the structural integrity and durability of components.
Mode Shapes of a Turbine Blade
Our laser Doppler vibrometer provides precise, non-contact analysis of the vibration patterns of individual turbine blades. These measurements deliver valuable insights into blade mode shapes and vibration characteristics, helping optimize structural design and extend service life. Non-contact measurement allows turbine blades to be examined under realistic loading conditions and resonances to be detected at an early stage, ensuring long-term operational reliability.
Vibration measurement in research, development and industry – Optomet offers the right solution for your requirements.
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