# What is Dynamic Load in Welding?

Dynamic load is a force exerted by a moving body on a resistance member, usually in a relatively short time interval. The dynamic loads acting on welded structures are generally caused by external forces such as wind, waves, or earthquakes. In many cases, the loads applied to the structure may be time-varying, meaning that they change over the course of time. This can make the design and analysis of welded structures quite challenging.

One of the main challenges in designing welded structures for dynamic loads is ensuring that the joints between members are strong enough to resist the forces acting on them. Welds are typically designed to withstand static (i.e., non-moving) loads, but they may not be able to resist the much higher stresses that can occur during a dynamic event. This is why it is important to consider the effect of dynamic loads when designing welded structures.

There are several methods that can be used to analyze the effects of dynamic loads on welded structures:

1. One common method is finite element analysis (FEA). This technique involves dividing the structure into a number of small elements, each of which is then analyzed separately. The results from all of the individual elements are then combined to give an overall picture of how the structure will respond to the applied loads.
2. Another method that can be used to analyze the effects of dynamic loads is experimental testing.

## What is static and dynamic loading?

Static loads are those that act on a structure at rest, while dynamic loads are those that act on a structure in motion.

Both types of loads can cause the welds in a structure to fail. However, dynamic loads are generally much more severe than static loads, and so they must be carefully considered when designing welded structures.

## What is the difference between a permanent load and a dynamic load?

A permanent load is a force that acts on a structure at all times, while a dynamic load is a force that acts on a structure only occasionally. Permanent loads are usually much smaller than dynamic loads, and so they have less of an effect on the strength of welds.

### Dynamic load examples

Some examples of dynamic loads that can act on welded structures are:

• Wind,
• Waves,
• Earthquakes,
• Vehicle collisions,
• Explosions.