Modal Analysis & ODS Services

Advanced Structural Diagnostics, including Modal Analysis and ODS, are the ultimate tools for solving complex vibration problems that persist even after balancing and alignment. Operating Deflection Shape (ODS) analysis involves measuring vibration at multiple points across a machine’s structure while it is running. We then use specialized software to animate these movements, revealing phase relationships and structural weaknesses. This is particularly useful for identifying issues like “twisted” frames or loose anchor bolts that cause high vibration at specific operating speeds.Modal Analysis, on the other hand, is a controlled test where we excite the structure using an impact hammer or shaker to identify its natural frequencies (modes). If a machine’s operating speed or a harmonic frequency coincides with one of these natural frequencies, resonance occurs, leading to extreme vibration levels and rapid structural fatigue. Our comprehensive report identifies these critical frequencies and provides engineering recommendations, such as changing the structural stiffness or adding mass, to shift the natural frequencies away from the operating zone. This service is indispensable for troubleshooting large fans, turbine foundations, and sensitive industrial flooring where structural integrity is paramount.