NON-DESTRUCTIVE EVALUATION OF ROPES BY USING TRANSVERSE VIBRATIONAL WAVE METHOD

摘要

A non-destructive method evaluates ropes, cables, and strands for flaw and tension. The method permits detecting flaws by recognizing certain vibrational wave amplitude and distribution patterns resulting from striking a test subject (12) with a transverse force. Tension on a test subject (12) is calculated by measuring propagation velocity of the vibrational waves through the test subject (12). An apparatus (10) is provided which produces vibrational waves (14) in a test subject (12), measures the amplitude and time distribution of the waves (20), and displays the measurements (38) for analysis.