Preventing tube sheet vibration fatigue requires addressing the issue from the design stage. Optimizing the tube sheet structure, such as increasing the number of support plates or using a welding and expansion combined process, can improve overall rigidity and reduce vibration amplitude. Simultaneously, a reasonable arrangement of heat exchanger tube spacing should be implemented to avoid fluid vortex resonance and reduce the impact of alternating stresses.
During operation, the fluid flow rate should be controlled to prevent excessive velocity impact on the tube sheet. Regular monitoring of vibration conditions and timely adjustment of operating parameters are crucial to prevent the initiation of fatigue cracks. If necessary, vibration damping devices, such as buffers or elastic supports, should be added to dissipate vibration energy.
In terms of material selection, priority should be given to alloy steels with strong fatigue resistance. Combining this with surface coating technology can enhance corrosion resistance and reduce fatigue damage caused by environmental factors. Regular maintenance and inspections are essential to ensure the long-term stable operation of the tube sheet.
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