Effective is being used in the scientific formula for the effective power of an acoustic system, ie, Wie is the force applied to a body, multiplied by the frequency, and thus is the effective power received by an acoustic medium at a given frequency, or Power Factor. The other term often heard is dissipative power, which is the force required to change the motion of the average diaphragm. It’s also commonly expressed as Pd and is usually denoted as dP.
A combination of materials is necessary for an effective design. To arrive at the effective level, all material costs must be accounted for. In practice, few composites are totally free of material costs. A great many composites are in large part composites with considerable variation in their levels of total maintenance costs. These costs have an effect on the cost-per-unit cost of the construction materials.
Composites, including polyurethane, are produced in large amounts. Because of the variations in production, many composites have quite low or even zero effective material specifications. To determine an effective material specification, the effective values must be aggregated from the sum of individual effective values for each individual part. The parts of the composite must then be subjected to the same conditions as all other components, so that each part’s effective power is equal to its composite effective power. Once all components are the same, any comparison of individual parts can be performed on the effective level.
Many of today’s buildings and homes have steel frames. Steel frames have obvious advantages as an effective construction material, including strength and fire resistance. However, the buildings and homes using steel as the primary frame have similar effective material specifications as all other frames except the effective power component. This means that the steel framing must be equal to the sum of all effective material strengths for that frame in order to give the building its total effective power. All the individual parts of the frame need to have the equivalent effective strength to resist corrosion and the pressure that the frame is expected to withstand while standing still.
Steel, like alloys, is composed of several different metals which are combined together in varying proportions. In general, the higher the alloy, the greater the number of combining metals. The most important factor in determining effective material specifications is how well those metals are mixed. The mix of metals determines how well the building is able to resist stress and how well the building retains heat during operation. In essence, the effective material specifications of a metal are derived from its properties when measured in comparison to another metal of the same weight and composition.
If the effective material
of an alloy are too great, it will either not stand up to stress and weathering, or it will fail to resist corrosion. The ideal case scenario would be to have the most appropriate weight and density for the materials being used. However, metals are man-made and therefore inherently unstable. If the effective material specifications of the alloy being used is too great, it may actually fail, causing a great loss of property and making the structure unusable.
One way to determine the effective properties of a building material is to evaluate the results of tests conducted under dynamic conditions. For example, an evaluation should be done before a building is built in order to see if it is capable of resisting collapse due to earthquakes. It should also be evaluated after the structure is fully built in order to see if the material has failed. After an evaluation has been performed on a material, it can still fail the test but the cause of failure might be due to improper design. The structure’s stability could also be ruled out due to structural imbalances or other external factors.
In addition to determining the effective material of a metal frame, other similar tests must also be performed. These include strengthening tests and fatigue testing. After a structure is built, it must be tested to ensure its durability against natural forces such as earthquakes and strong winds. Also, buildings that will be subjected to fire attacks must be evaluated to see how they are able to withstand heat and high temperatures.
