Training Highlights

Training, Training Training Training

1: Design of Foundations for Grinding Mills (Ball Mills / SAG Mills)
Heavy, low-speed, high-impact dynamic machines

Core modules:

• Understanding mill loading (static + charge + impact loads)
• Block vs framed foundations – selection criteria
• Soil–structure interaction for heavy foundations
• Free vibration & mode shapes (rigid body vs flexural modes)
• Forced vibration due to unbalance & gear interaction
• Amplitude limits and serviceability criteria
• Case studies: high amplitude at mill pedestals

2. Design of Foundations for Turbo Generators & Rotating Equipment
High-speed precision machines with strict vibration limits

Core modules:

• Machine modeling: mass at rotor centerline
• Frequency separation criteria (1X, 2X, harmonics)
• Frame-type foundation behavior
• Column flexibility & rocking modes
• Effect of attachments (cooler walls, floors)
• Steady-state vs transient response
• Case studies: resonance near operating speed

Core modules:
• VFD operation and transient resonance
• Foundation stiffness vs operating speed relationship
• Amplitude evaluation at bearings
• Isolation requirements vs rigid mounting
• Duct interaction and coupled vibration issues
• Case studies: high vibration due to poor detuning

3. Design of Foundations for Blowers, Fans & Compressors
Medium to high-speed machines, often VFD-controlled

Core modules:
• Dynamic loads in crushers & screening systems
• Spring-supported systems (VIS) behavior
• Importance of pedestal stiffness (≥ 10× spring stiffness)
• Resonance in supporting structure
• FFT-based vibration interpretation
• Structural failures due to local resonance
• Case studies: bracing failure, excessive transverse vibration

4. Design of Foundations for Crushers, Screens & Vibro Equipment
High dynamic forces, impact & cyclic loading

5. Design of Pile-Supported Machine Foundations
Dynamic behavior of foundations on piles

Core modules:
• Pile stiffness (vertical & lateral) – calculation methods
• Group effect and pile interaction
• Modeling piles in FEA (spring vs continuum approach)
• Coefficient of uniform compression
• Effect of soil variability
• Frequency and response sensitivity to stiffness
• Case studies: incorrect pile stiffness leading to resonance