testing of a prototype


Both desirable and undesirable vibrations must be considered when designing mechanical or structural systems that are exposed to dynamic loads.

The prevention or control of such vibrations must be determined by testing of a prototype or using a mathematical model to simulate similar conditions to which the system will be exposed. Out of these two options building a mathematical model using Finite Element Analysis is the most inexpensive and viable way to gather information and to make changes early in the design cycle.

Optimum Solutions

dynamic analysis

This information is needed because under certain conditions moving machines parts can cause vibrations which adversely affects the operation of intruments on or near the machine, or even damage the machine itself by causing excessive levels of stress. Further more, fluctuating stress caused by vibrations may induce fatigue failures if is not properly control within some marginal safety levels.
Optimum Solutions can provide you, our constumer, with information as to how your system will behave when expose to dynamic loads. Our company can provide you with any of the main four types of dynamic analysis currently used in industry.

The following is a brief description of the four analyses.

Dynamic Time:

A special kind of dynamic loading better known as impulsive can be analyzed in the time analysis. Impulsive loads are generally relatively short on duration, therefore, they are assumed to have an infinite period. These types of loads are frequently important in the design of certain classes of structural systems (e.g. vehicles such as trucks or automobiles). Dynamic Time Analysis can be used to obtain the steady state as well as the transient response of the system.

Dynamic Frequency:

There are some types of load condition, which make an analysis more convenient to perform in the frequency domain. The frequency domain is superior to the time domain approach when the forcing load is periodic. A periodic loading exhibits the same time variation successively for a large number of cycles. The simple periodic loading has a sinusoidal variation also known as simple harmonic. Simple harmonic loading is characteristic of unbalanced-mass effects in rotating machinery. Other example of periodic loading are those caused by hydrodynamic pressure generated by a propeller at the stern of a ship or by inertial effects in reciprocating machinery, which are frequently more complex. However, by means of a Fourier analysis any periodic loading can be represented as the sum of a series of simple harmonic components.

Dynamic Random:

Random vibration is exactly what the name describes, vibrations that occur randomly. Driving down the road makes a car vibrate. It is never known when the car will hit a bump in the road because it occurs randomly. This is different from the vibration caused by an engine or a tire rotating in regular cycles which is easier to analyze using dynamic frequency response.

Dynamic Shock:

Dynamic Shock analysis is based on the response of a single degree of freedom system. This technique usually provides maximum response of the system when excited with a given shock load. This is usually used for earthquake analysis.