| 摘要 |
PROBLEM TO BE SOLVED: To provide a stress analysis method and device for an engine, configured to efficiently analyze stress to be applied to the engine, and to reliably evaluate high stress to be generated by resonance in a predetermined frequency band.SOLUTION: Measurement calculation means 15 measures a static strain and a natural frequency in a portion to be measured in an engine, and a fluctuating stress in the portion to be measured during engine operation, on the basis of an electric signal detected by sensor means 12 and amplified by amplifying means 13. Operation analysis processing means 17 performs a static strain analysis based on a static strain measurement result, a frequency analysis based on a natural frequency measurement result, a peak rotation frequency analysis based on a fluctuating stress measurement result, a peak rotation stress analysis, and a raw waveform analysis. The operation analysis processing means 17 further performs a static strength evaluation based on the static strain analysis result and a material properties of the engine, a resonance evaluation based on the frequency analysis result and a peak rotation frequency analysis result, and a fluctuating strength evaluation based on a peak rotation stress analysis result and the material properties of the engine. |
