Trykkstøt

Trykkstøt is a Norwegian term that describes a sudden, short-lived change in pressure in a fluid or gas, typically an impulsive overpressure caused by dynamic events such as rapid valve closure, load impacts, explosions, or other rapid changes in flow. The word combines trykk (pressure) and støt (knock, strike), and the concept is used across technical and engineering contexts to denote transient pressure effects.

In engineering and hydraulics, trykkstøt is often referred to as a pressure transient or water hammer. It describes the surge in pressure that travels through piping when flow is suddenly altered, such as when a valve closes quickly. These transients can stress pipes, joints, and equipment, potentially causing damage if not properly managed. Mitigation measures include surge tanks, air chambers, slow-closing valves, reinforced piping, and careful valve sequencing to limit peak pressures and dampen oscillations.

In acoustics, geophysics, and safety analysis, trykkstøt refers to short-duration pressure waves or impulse loads. The magnitude of a trykkstøt is typically expressed in pascals or bars, with duration on the order of milliseconds, depending on the source event and the medium.

The term is used in safety standards and engineering design to assess transient loads and structural response. Related concepts include overpressure, pressure transient, water hammer, and impulse pressure. While the exact usage can vary by field, trykkstøt generally denotes a rapid pressure impulse and its potential impact on systems and structures.