What factors affect the natural frequency of the brake disc

1) There is no factor that can affect the natural frequency of the brake disc.

2) Reason: Natural frequency is a characteristic of an object. This characteristic is similar to mass, the mass of an object does not change no matter where it is placed and what external conditions are. When the external excitation frequency reaches the natural frequency of the object, the amplitude of the object is maximum, and it is resonant.

Maintenance method of brake system:

1) Brake disc cleaner Before use, please shake the liquid in the tank well and spray it directly on the parts that need to be cleaned until the dust and oil stains are completely removed, and wipe it clean with a clean towel without leaving dust and residual liquid.

2) Brake cylinder guide pin lubricant Wear one-finger gloves and evenly apply the product on the surface of the brake cylinder guide pin and the guide pin groove Do not mix with other mineral lubricants.

3) Brake pad high temperature protector Wear one-finger gloves and evenly apply the product to the back of the brake pad and the sliding groove at both ends of the brake pad.

4) High temperature and anti-bite lubricant Wear one-finger gloves and evenly apply the product to the metal contact surface between each tire screw rod and tire bell and wheel hub.

Although the natural frequency can not be changed with a stool, we can induce the brake disc to vibrate at a certain high-order natural frequency that is inaudible to the human ear through the brake disc design. Search for "brake disc shape design based on friction brake noise frequency" or "design and manufacture brake disc yourself".

The impact is too small to change.

There is a frequency of solid bai.

It is the intrafrequency rate of DAO vibration determined by physical factors such as the density and external shape of the object. And the application of external force makes.

The frequency that allows him to vibrate is called the instigation frequency, which is a forced vibration. When the injecting frequency is equal to the natural frequency, the object resonates and reaches its maximum amplitude.

Therefore, as long as the driving force is used to make the object resonate to the maximum amplitude, then the frequency of the driving force is equal to the natural frequency of the object.

1 by the state of the object: temperature, size, shape, etc. 2. It is related to the properties of the object: composition, density, mass, etc.

It is mainly related to the movement of the earth. The movement of the earth gives every solid object a frequency. The rest is to look at the shape, size, location, material, and so on.

Take a microelement, the differential equation of motion will include density, cross-sectional area a, elastic modulus e, and at the same time there is a preload t, and the total length l is used as boundary conditions, which are the factors that affect the frequency.

Mass (weight), stiffness (thickness, tension).

First, the meaning is different.

The undamped natural frequency refers to the frequency of the free vibration formed only by the elastic force and inertial force of the system in the undamped mechanical system, that is, the undamped natural frequency is only related to the mass and elastic coefficient of the system. Natural frequencies are also known as natural frequencies.

Second, the formation is different.

Undamped natural frequencies: the frequency of free vibrations formed by systematically elastic and inertial forces; The natural frequency is when an object vibrates freely, and its displacement varies with time according to the law of sine or cosine.

The undamped natural frequency is only related to the mass and elasticity of the system; The natural frequency is only related to the intrinsic properties of the system (such as mass, shape, material, etc.), and the corresponding period is called the natural period.

Third, the detection methods are different.

If the atomic energy entropy value of the dominant component in the two-phase or three-phase current is greater than and the frequency value is equal, the dominant component is considered to be the natural frequency component, and each phase containing the natural frequency component is the fault phase, otherwise, the fault traveling wave is considered to be mixed, and the fault type is a single-phase grounding fault. Then, the fault phase is found according to the decoupled wide-mode current.

It's one thing, undamped natural frequencies are natural frequencies. I would also like to talk about the difference between the damped oscillation state and the resonant state. The former is a transitional solution (transient solution) in all solutions of a system of differential equations for a time-domain circuit; The latter is a steady-state solution in all solutions of a system of differential equations for a time-domain circuit, and it is a special steady-state solution (resonant state) in a steady-state solution.

The former has a frequency of d; The latter frequency is o 1 lc and d< o. The former frequency is related to the resistance r; The latter frequency is independent of the resistance r. In the former time-domain circuit, the eigenvalue of the coefficient matrix a of the system of first-order differential equations is obtained, and when the eigenvalue is a pair of conjugate complex roots, it corresponds to a frequency of the damping oscillation (2 roots for the equation); The latter can be solved in a time-domain circuit to obtain a special case of resonance for steady-state solutions; In a sinusoidal steady state circuit, you can also find the complex impedance (or complex admittance) of the circuit, and then let the imaginary part 0 to obtain a higher order algebraic equation, which has only real roots, which are the frequencies of the resonant state (4 energy storage elements have 3 resonant frequencies).

The former can occur only by adding a sinusoidal power supply, can occur with only the initial value, and can still occur with both a sinusoidal power supply and an initial value; The latter must have a sinusoidal power supply to occur (the initial value is optional).

Natural vibrations: Under certain initial conditions, elastomers produce a special class of vibrations characterized by: each point of the object.

All of them are simple harmonic vibrations of the same frequency and phase, and the amplitude of each point maintains a certain proportion, this vibration is called natural vibration, its frequency is called natural frequency, and the shape of the amplitude of each point is called natural mode shape or principal mode shape.

Free vibration: The elastomer vibrates freely when it is initially disturbed.

If the initial displacement and initial velocity of the elastomer are proportional to a certain natural mode shape, then the free vibration is the corresponding natural vibration.

The undamped natural frequency refers to the frequency of the free vibration in an undamped mechanical system that is formed only by the elastic and inertial forces of the system. That is, the undamped natural frequency is only related to the mass and elasticity coefficient of the system.

Natural frequencies are also known as natural frequencies. When an object vibrates freely, its displacement changes with time according to the law of sine or cosine, and the frequency of the vibration is not related to the initial conditions, but only to the inherent characteristics of the system (such as mass, shape, material, etc.), which is called the natural frequency, and its corresponding period is called the natural period.

The natural frequency is independent of the initial conditions, but rather the intrinsic characteristics of the system. It is related to its hardness, mass, and dimensions, and when it is deformed, the elastic force recovers it. The elastic force is mainly related to size and hardness, and mass affects its acceleration.

In the same shape, the frequency with high hardness is high, and the frequency with high mass is low.

When an object vibrates freely, its displacement changes with time according to the law of sine or cosine, and the frequency of the vibration has nothing to do with the initial conditions, but only with the inherent characteristics of the system (such as mass, shape, material, etc.), so it is called natural frequency, and its corresponding period is called natural period.

Its own material, structure, morphology, and even the amount of internal tension and other factors are determined. For example, the strings of the erhu vibrate and make sounds, and the tighter the tension, the higher the pitch, that is, the higher the frequency; Under the same conditions, the shorter the effective part, the higher the frequency; Under the same conditions, the finer the chord, the higher the frequency. Wait a minute.