Phase Constant Formula

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Phase Constant is a measure of the initial displacement or angle of an oscillating system in under damped forced vibrations, affecting its frequency response. Check FAQs
ϕ=atan(cωk-mω2)
ϕ - Phase Constant?c - Damping Coefficient?ω - Angular Velocity?k - Stiffness of Spring?m - Mass suspended from Spring?

Phase Constant Example

With values
With units
Only example

Here is how the Phase Constant equation looks like with Values.

Here is how the Phase Constant equation looks like with Units.

Here is how the Phase Constant equation looks like.

55.008Edit=atan(5Edit10Edit60Edit-0.25Edit10Edit2)
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Phase Constant Solution

Follow our step by step solution on how to calculate Phase Constant?

FIRST Step Consider the formula
ϕ=atan(cωk-mω2)
Next Step Substitute values of Variables
ϕ=atan(5Ns/m10rad/s60N/m-0.25kg10rad/s2)
Next Step Prepare to Evaluate
ϕ=atan(51060-0.25102)
Next Step Evaluate
ϕ=0.960070362405688rad
Next Step Convert to Output's Unit
ϕ=55.0079798014517°
LAST Step Rounding Answer
ϕ=55.008°

Phase Constant Formula Elements

Variables
Functions
Phase Constant
Phase Constant is a measure of the initial displacement or angle of an oscillating system in under damped forced vibrations, affecting its frequency response.
Symbol: ϕ
Measurement: AngleUnit: °
Note: Value should be greater than 0.
Damping Coefficient
Damping Coefficient is a measure of the rate of decay of oscillations in a system under the influence of an external force.
Symbol: c
Measurement: Damping CoefficientUnit: Ns/m
Note: Value should be greater than 0.
Angular Velocity
Angular velocity is the rate of change of angular displacement over time, describing how fast an object rotates around a point or axis.
Symbol: ω
Measurement: Angular VelocityUnit: rad/s
Note: Value should be greater than 0.
Stiffness of Spring
The stiffness of spring is a measure of its resistance to deformation when a force is applied, it quantifies how much the spring compresses or extends in response to a given load.
Symbol: k
Measurement: Surface TensionUnit: N/m
Note: Value should be greater than 0.
Mass suspended from Spring
The mass suspended from spring refers to the object attached to a spring that causes the spring to stretch or compress.
Symbol: m
Measurement: WeightUnit: kg
Note: Value should be greater than 0.
tan
The tangent of an angle is a trigonometric ratio of the length of the side opposite an angle to the length of the side adjacent to an angle in a right triangle.
Syntax: tan(Angle)
atan
Inverse tan is used to calculate the angle by applying the tangent ratio of the angle, which is the opposite side divided by the adjacent side of the right triangle.
Syntax: atan(Number)

Other formulas in Frequency of Under Damped Forced Vibrations category

​Go Static Force using Maximum Displacement or Amplitude of Forced Vibration
Fx=dmax((cω)2-(k-mω2)2)
​Go Static Force when Damping is Negligible
Fx=dmax(m)(ωnat2-ω2)
​Go Deflection of System under Static Force
xo=Fxk
​Go Static Force
Fx=xok

How to Evaluate Phase Constant?

Phase Constant evaluator uses Phase Constant = atan((Damping Coefficient*Angular Velocity)/(Stiffness of Spring-Mass suspended from Spring*Angular Velocity^2)) to evaluate the Phase Constant, Phase Constant formula is defined as a measure of the initial angle of oscillation in an underdamped forced vibration system, characterizing the phase shift of the oscillations from the driving force, and is a critical parameter in understanding the behavior of oscillatory systems. Phase Constant is denoted by ϕ symbol.

How to evaluate Phase Constant using this online evaluator? To use this online evaluator for Phase Constant, enter Damping Coefficient (c), Angular Velocity (ω), Stiffness of Spring (k) & Mass suspended from Spring (m) and hit the calculate button.

FAQs on Phase Constant

What is the formula to find Phase Constant?
The formula of Phase Constant is expressed as Phase Constant = atan((Damping Coefficient*Angular Velocity)/(Stiffness of Spring-Mass suspended from Spring*Angular Velocity^2)). Here is an example- 3151.725 = atan((5*10)/(60-0.25*10^2)).
How to calculate Phase Constant?
With Damping Coefficient (c), Angular Velocity (ω), Stiffness of Spring (k) & Mass suspended from Spring (m) we can find Phase Constant using the formula - Phase Constant = atan((Damping Coefficient*Angular Velocity)/(Stiffness of Spring-Mass suspended from Spring*Angular Velocity^2)). This formula also uses Tangent (tan), Inverse Tan (atan) function(s).
Can the Phase Constant be negative?
No, the Phase Constant, measured in Angle cannot be negative.
Which unit is used to measure Phase Constant?
Phase Constant is usually measured using the Degree[°] for Angle. Radian[°], Minute[°], Second[°] are the few other units in which Phase Constant can be measured.
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