KR101899330B1 - Stock bridge damper design parameter selection apparatus and the method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design of a stock bridge damper design parameter, and relates to a stock bridge damper design parameter setting apparatus and method thereof, which can derive design parameter combinations for positioning a resonance point of a stock bridge damper at a desired position.
Wherein the stock bridge damper design parameter setting device includes: a modeling unit that generates a stock bridge damper model using input stock bridge damper parameters; A resonance point calculation unit for deriving a resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model; And a parameter setting unit for setting a design bridge bridge damper design parameter for determining the resonance points of the stock bridge damper model after deriving an objective function from the stock bridge damper model.

Description

{STOCK BRIDGE DAMPER DESIGN PARAMETER SELECTION APPARATUS AND THE METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design of a stock bridge damper design parameter, and relates to a stock bridge damper design parameter setting apparatus and method thereof, which can derive design parameter combinations for positioning a resonance point of a stock bridge damper at a desired position.

The stock bridge damper is designed to reduce the occurrence of vibration in the direction perpendicular to the wind due to the vortex shedding phenomenon associated with the air flow in the breeze range of 1-7m / s for a single power line. . In the 1920s, the basic structure was proposed by Stok Bridge in the United States. Based on the research results of the 1960s, research on damper design technology and positioning was carried out in earnest. Until recently, most of the 2R dampers, which are symmetrical in the left and right, have been mostly used. Recently, the 4R damper type, which is asymmetrical in both sides, has been used in order to increase the number of resonance points and reduce vibration in a wider band. 2R and 4R refer to the number of resonance points generated by the damper, respectively. In the symmetric structure, two resonance points where the unbalanced mass is overlapped by translational motion and rotational motion appear. In the asymmetric structure, Four resonance points appear.

The resonance of the damper plays an important role in determining a band of energy in which the damper absorbs the vibration energy of the power line and it is necessary to set the position of the resonance point so as to cope with the main frequency band of the target vibration energy as much as possible.

However, stock bridge dampers are only valid for certain design specifications, and performance will vary if they are changed to other specifications. Therefore, the design of the resonant point of the damper in the process of designing the bridge damper plays a crucial role in determining the design specifications of the damper as well as the vibration durability issues occurring in the future operation. However, domestic specialists have difficulty in accurately predicting response characteristics based on design specifications in advance because of lack of rationale related to bridge bridge damper. In order to compensate for this, benchmarking foreign mass production specifications, I have been making imitation products in the market.

Patent No. 10-1292645

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of designing a resonance point of a stock bridge damper, And to provide a stock bridge damper design parameter setting apparatus and a method thereof capable of shortening a design period and improving vibration reduction performance of a developed product.

According to an aspect of the present invention, there is provided a stock bridge damper parameter setting apparatus,

A modeling unit for generating a stock bridge damper model using the inputted stock bridge damper parameters;

A resonance point calculation unit for deriving a resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model; And

And a parameter setting unit for setting a design bridge bridge damper design parameter for determining the resonance points of the stock bridge damper model after deriving an objective function from the stock bridge damper model.

The modeling unit,

The load bridge variable damper according to any one of claims _{1 to} 3, wherein the load bridge variable damper has a variable load state variable x ₁ , a load state variable x ₂ , a load weight m, a load moment J, Can be configured to model the stock bridge damper using the site length (l), the center of gravity (G) of the load center, the position (O) of the meshing site, and the instantaneous stiffness (k).

The modeling unit,

The damper model equation of modeled stock bridge damper

As shown in FIG.

Here, F (V) represents an external force.

The eigenvalue analysis equation for the eigenvalue analysis of the resonance point calculator includes:

이고,

ego,

Here, λ is characterized in that the λ1, λ2 and, k11 = 4k, k12 = k21 = 2kL, k22 = (4kL 2/3).

The resonance point calculation unit calculates, from the eigen value analysis equation,

The resonance points of the resonator are derived.

Wherein the parameter setting unit comprises:

The load weight (m), the total length (L) of the messenger, the length (1) of the mesh fastening portion (1), and the load (1) of the stock bridge damper design parameters determining the resonance points of the stock bridge damper model after deriving the objective function from the resonance points And to set the negative moment of inertia (I _G ).

The objective function may include:

이고,

ego,

Here,? 1 and? 2 are each a resonance point,? And? Are frequencies of resonance points, w is a weight for a resonance point, and n is a messenger length.

Wherein the parameter setting unit comprises:

After setting the weight to '2', an initial value for the design bridge bridge damper design parameters is set, and the allowable range of the design parameters is varied within a predetermined value range around the reference value, and a predetermined number of resonance points And to set the design parameters of the resonance points having the minimum value among the predetermined number of resonance points for each resonance point as the stock bridge damper design parameters.

According to another aspect of the present invention, there is provided a method of setting a stock bridge damper parameter,

A modeling process of generating a stock bridge damper model using the stock bridge damper parameters input by the modeling unit;

A resonance point calculation step of deriving a resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model; And

And setting a design bridge bridge damper design parameter determining the resonance points of the stock bridge damper model after deriving an objective function from the stock bridge damper model.

In the modeling process,

The load bridge variable damper according to any one of claims _{1 to} 3, wherein the load bridge variable damper has a variable load state variable x ₁ , a load state variable x ₂ , a load weight m, a load moment J, Can be configured to model the stock bridge damper using the site length (l), the center of gravity (G) of the load center, the position (O) of the meshing site, and the instantaneous stiffness (k).

In the modeling process,

The damper model equation of modeled stock bridge damper

As shown in FIG.

Here, F (V) represents an external force.

The resonance point calculation process includes:

The eigenvalue analysis equation for the eigenvalue analysis is expressed as

로 설정하고,

Lt; / RTI >

From the eigenvalue analysis,

Lt; RTI ID = 0.0 >

Here, λ is characterized in that the λ1, λ2 and, k11 = 4k, k12 = k21 = 2kL, k22 = (4kL 2/3).

Wherein the parameter setting unit comprises:

The load weight (m), the total length (L) of the messenger, the length (1) of the mesh fastening portion (1), and the load (1) of the stock bridge damper design parameters determining the resonance points of the stock bridge damper model after deriving the objective function from the resonance points A negative moment of inertia (I _G )

The above-

로 설정한 후,

And then,

After setting the weight to '2', an initial value for the design bridge bridge damper design parameters is set, and the allowable range of the design parameters is varied within a predetermined value range around the reference value, and a predetermined number of resonance points And sets the design parameters of the resonance points having the minimum value among the predetermined number of resonance points for each resonance point as the stock bridge damper design parameters,

Here,? 1 and? 2 are each a resonance point,? And? Are frequencies of resonance points, w is a weight for a resonance point, and n is a messenger length.

The present invention with the above-described structure enables designing a stock bridge by finding an anticipated resonance point when values of design parameters constituting a corresponding equation are determined based on a governing equation expressing the dynamic behavior of the stock bridge damper The present invention provides an effect of reducing the design period and improving the vibration reduction performance of the developed product by making it possible to present an optimal design plan related to the design of the resonance point of the stock bridge damper.

1 is a functional block diagram of a stock bridge damper parameter setting device 1 according to an embodiment of the present invention;
FIG. 2 is a flowchart showing a process of a stock bridge damper parameter setting method according to an embodiment of the present invention; FIG.
Fig. 3 is a diagram showing one side of a stock bridge damper modeled by the modeling unit 51 of Fig. 1; Fig.
4 is a graph showing the results of the first-order simulation.
5 is a graph showing objective function values of a simulation result performed by a modified objective function.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The embodiments according to the concept of the present invention can be variously modified and can take various forms, so that specific embodiments are illustrated in the drawings and described in detail in the specification or the application. It is to be understood, however, that the intention is not to limit the embodiments according to the concepts of the invention to the specific forms of disclosure, and that the invention includes all modifications, equivalents and alternatives falling within the spirit and scope of the invention. Also, the word " exemplary " is used herein to mean " serving as an example, instance, or illustration. &Quot; Any aspect described herein as " exemplary " is not necessarily to be construed as preferred or advantageous over other aspects.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms " comprises ", or " having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

1 is a functional block diagram of a stock bridge damper parameter setting device 1 according to an embodiment of the present invention.

1, the stock bridge damper parameter setting apparatus 1 includes an input unit 10, a storage unit 20, an output unit 30, a display unit 40, a control unit 50, and a communication unit 60 .

The input section 10 calculates the load bridge state variable x ₁ , the load rotational state variable x ₂ , the load weight m, and the load moment J of the stock bridge damper for modeling the stock bridge damper ), IM full length (L), IM fastening part length (l), the loading center of gravity (G), IM fastening part position (O), x ₁ and x ₂ related messenger rigidity (k), x ₁ and x ₂ related IM attenuation (μ), and the central radius of rotation (k _G), a power line as being configured to be able to enter the translational state variable (y _1), keyboard input, the keyboard is connected to the port, USB type device, a magnetic storage device or an optical disk A read / write device such as a disk driver capable of reading and writing data from / to a storage device such as a storage device, or a file input device capable of receiving a file input.

The storage unit 20 stores variables of the stock bridge damper inputted through the input unit 10 and an operation program for parameter setting, and is a storage medium readable and writable by a computer such as a hard disk or EP-ROM Lt; / RTI >

The output unit 30 outputs the result of setting the parisel of the stock bridge damper and may include an output device such as a printer, a plotter, an optical writer, and a magnetic recording device.

The display unit 40 may be a display device or the like as an information display device for confirming the parameter setting process of the stock bridge damper.

The communication unit 60 is configured to provide a communication function for allowing the stock bridge damper parameter setting apparatus 1 to communicate with an external communication apparatus through a communication network.

The control unit 50 includes a modeling unit 51, a resonance point calculation unit 52, and a parameter setting unit 53, which are configured to load and execute a program for setting a stock bridge damper parameter.

The modeling unit 51 is configured to generate a stock bridge damper model using the inputted stock bridge damper parameters. The equation of the damper model generated by the modeling unit 51 is as follows.

[Equation 1]

<Damper model formula>

), 상태변수의 속도(

), 하중부병진상태변수(x₁), 하중부회전상태변수(x₂), 하중부무게(m), 하중부모멘트(J), 메신저전체길이(L), 메신저 체결부위 길이(l), 하중부 무게중심(G), x₁과 x₂ 관련 메신저 강성(k)이다.Here, each variable represents the acceleration of the state variables (

), The speed of the state variable (

), Loading the translation state variables (x _1), the loading rotation state variables (x _2), loading weight (m), a load negative moment (J), IM full length (L), IM fastening part length (l), and The center of gravity of the center of gravity (G), and the instant messenger stiffness (k) associated with x ₁ and x ₂ .

The resonance point calculation unit 52 is configured to derive the resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model.

The eigenvalue analysis equation of the resonance point calculation unit 52 is as follows.

&Quot; (2) &quot;

<Eigen value analysis formula>

Here, λ is λ1, λ2, and is, k11 = 4k, k12 = k21 = 2kL, k22 = (4kL 2/3).

The solution of the < eigenvalue analysis equation > represents the resonance points, and the &quot; revolution points &quot; for the following resonance points are derived from the eigenvalue analysis equation.

 &Lt;

&Quot; (3) &quot;

&Quot; (4) &quot;

&Quot; (5) &quot;

The parameter setting unit 53 sets the load weight m, the total length L of the messenger, the length l of the messenger joint, and the length L of the bridge bridge damper design parameters for determining the resonance points of the stock bridge damper model using the objective function, And to set the inertia moment (I _G ) of the load portion. In this case, the mass moment J at the position of the connecting part of the load is J = I _G + ml ² .

&Quot; (6) &quot;

<Objective function>

Here, lambda 1 and lambda 2 can be set to '2' as respective resonance points, alpha and beta are the frequencies of the resonance points, w is the weight for the resonance point, and n is the weight of the item for the messenger length.

The value of the objective function is the closest value to the desired frequency band.

In order to derive the resonance point by the objective function, an initial value for the design bridge bridge damper design parameters is set. The allowable range of the design parameters is varied within a range of a predetermined value around the reference value, and a predetermined number of resonance points are derived And the design parameters of the resonance points having the minimum value among the predetermined number of resonance points with respect to the respective resonance points are set as the stock bridge damper design parameters.

FIG. 2 is a flowchart showing a process of a stock bridge damper parameter setting method according to an embodiment of the present invention.

As shown in FIG. 2, the stock bridge damper parameter setting method is configured to perform a modeling process (S10), a resonance point calculation process (S20), and a parameter setting process (S30).

Hereinafter, the process of each configuration of the control unit 50 and the stock bridge damper parameter setting method of FIG. 2 in the stock bridge damper parameter setting apparatus 1 of FIG. 1 will be described.

The modeling process (S10) is a process of generating a stock bridge damper model by using the variable input values of the stock bridge damper by the modeling unit 51, and generating a dominant quasi-square of the stock bridge damper.

In the modeling process (S10), the modeling unit 51 calculates the load balance parameter x ₁ , the load rotation state variable x ₂ , the load weight m, ment (J), IM full length (L), IM fastening part length (l), the loading center of gravity (G), IM fastening part position (O), x ₁ and x ₂ related messenger rigidity (k), x ₁ and x ₂ related messenger attenuation (μ), and using a central radius of rotation _(G k), power-line translational state variable (y ₁₎ models the Stock bridge damper.

3 is a view showing one side of a stock bridge damper modeled by the modeling unit 51 of FIG.

3, the modeling process (S51) by the modeling unit 51 using the variables of the inputted stock bridge damper causes the stock bridge damper model having the combined structure of the messenger 100 and the load unit 200 .

Further, the modeling unit 51 calculates the governing equations of the modeled stock bridge damper

[Equation 1]

. Here, F (V) represents an external force.

The above-described stock bridge damper has a structure in which imbalance masses are attached to the messenger 100 on both sides with respect to a portion to be fastened to a power line. And the governing equation of the stock bridge damper is a theoretical expression representing the dynamic behavior of the modeled stock bridge damper. In the governing equations, F (V) corresponds to the external force generated on the power line, and the main frequency value is dependent on the wind speed (V).

Two resonance points with respect to one side of the damper can be derived by the governing equation of the stock bridge damper, and the derived resonance point corresponds to a vibration mode corresponding to the translation and rotation of the mass. In the case of a 2R damper, two resonance points appear symmetrically, and in the case of a 4R damper, four resonance points appear asymmetrically.

In the resonance point calculation step S20, the resonance point calculation unit 52 performs an eigen value analysis to determine a resonance point and a rotation motion resonance point of mass using a stock bridge damper model, and then derives the resonance point (? 1,? 2) .

In the parameter setting process S30, the load weight m, the total messenger length L, and the messenger engagement length L, which are the stock bridge damper design parameters modeled by using the objective function for parameter setting, l) and the moment of inertia of the load (I _G ), where J = I _G + ml ² , and the value of the objective function is the smallest value It is the closest value to the desired frequency band.

That is, in the parameter setting process (S30), the parameter setting unit 53 sets an initial value for the stock bridge damper design parameters for deriving the resonance point by the objective function, and sets the allowable range of the design parameters as a reference value The design parameters of the resonance points having a predetermined number of resonance points varying within a predetermined range centered around the predetermined number of resonance points are set as the design bridge bridge damper design parameters.

<Experimental Example>

Stock bridge damper modeling

The stockbridge damper has a relatively simple structure with two counterweight and a messenger cable supporting it. Since two resonances are generated by one balance weight (load part) and both have the same structure, only one damper model is sufficient to predict the total dynamic behavior. Assuming that the mass of the stock bridge damper is only in the balance weight, and the messenger cable (messenger) is only acting as stiffness and damping, the stock bridge damper of Fig. 3 is crowned.

는 균형추의 질량 및 균형추 연결부위 위치에서의 질량 모멘트를 각각 나타내며, L과 l은 각각 메신저의 길이와 하중부 무게중심(질량중심)(G)과 균형추 연결부위 사이의 거리를 나타낸다. 상태변수는 균형추 연결부위 위치에서 병진운동과 회전운동에 대해 x ₁ 과 x ₂ 로 표시된다. 메신저의 특성은 강성과 감쇠 값으로 표현이 되는데 x _i 와 x _j 상태 변수들에 대해 k _ij 로 강성과 감쇠 계수 μ를 활용하여 <수학식 1>의 지배방정식으로 표시된다. 그리고 <수학식 1>의 고유치 해석식은 <수학식 2>로 표시되고, 공진점들은 <수학식 3> 내지 <수학식 6>으로 표시된다.3, m and

L and l are the distance between the center of gravity (center of mass) (G) and the connecting point of the balance weight, respectively, of the messenger, and L and l respectively denote the mass of the balance weight and the mass moment at the position of the joint. The state variables are expressed as x ₁ and x ₂ for the translational and rotational movements at the joint position of the balance. The characteristics of the messenger are expressed by the stiffness and attenuation values. For the x _i and x _j state variables, k _ij Is expressed by the governing equation of Equation (1) using the stiffness and attenuation coefficient [ mu ]. The eigenvalue analysis equation of Equation (1) is expressed by Equation (2), and the resonance points are expressed by Equation (3) to Equation (6).

,

,

그리고

에 의해 값이 결정된다. 그러므로 4개 설계 변수들에 대한 합리적인 값을 설정하여 설계자가 원하는 위치에 공진점을 위치시키는 것이 바람직하다. Therefore, the two resonance points of the stock bridge damper are shown in Fig. 1, the design parameters used in the model

,

,

And

The value is determined by Therefore, it is desirable to set a reasonable value for the four design parameters so that the designer positions the resonance point at a desired position.

Objective function

Hz와

Hz로 설정을 하면 아래의 <수학식 7>과 같은 목적함수(J)를 구성할 수 있다. In the breeze condition of wind intensity between 1 m / s and 7 m / s, power line induces Aeolian vibration and the frequency band appears approximately between 5 Hz and 50 Hz. The stock bridge dampers reduce the vibration energy by separately vibrating the induced vibration energy through the balance weight. Therefore, the resonance point plays an important role in determining the vibration reduction performance of the damper. Two resonance points

Hz

Hz, an objective function (J) as shown in Equation (7) below can be constructed.

&Quot; (7) &quot;

는 4개의 설계 파라미터를 통해 결정이 되며, w은 2개 공진점에 대한 가중치를 나타내는 변수가 된다. 본 목적함수의 값이 가장 작은 값이 원하는 주파수 대역에 가장 근접한 값이 된다. Here, two resonance points ,

Is determined through four design parameters, and w is a variable representing a weight for two resonance points. The value of the objective function becomes the value closest to the desired frequency band.

Resonance point case study

Using the above-mentioned four design parameters, let us consider two resonance points derived from Equation (2). The initial values of each design parameter are set as shown in [Table 1] in consideration of reference documents and the resonance point derived from the initial model is also shown.

[Table 1]

The objective function was calculated by changing all the design parameters by 30% with this condition as the initial value. The two target resonance points used in the objective function are set to two values based on the initial values so that the number of the four cases in the simulation process is set. Also, the objective function weight w is set to 2 so that the contribution of the two resonance points is the same. The design parameters are set to 7 at the same interval within the range of [Table 2]. The optimum value may vary depending on the number of parameters and the number of parameter sets. The main purpose of this experiment was to confirm whether the optimal design conditions using the objective function were efficiently derived. Therefore, Validity was confirmed.

[Table 2]

As shown in [Table 2], the allowable range of the design parameters was set to 30% based on the reference value, and the change of the resonance point according to the relatively large change was examined. As mentioned above, the number of case studies is 2,401 (= 7 ㅧ 7 ㅧ 7 ㅧ 7) considering that the number of parameters is four because the individual parameter values are set in seven intervals.

,

를 목표 설정 값으로 지정하여 1차 시뮬레이션을 하였다. First, to investigate whether the objective function proposed in Equation (7) follows well the two resonance points set in Table 1,

,

Was set as the target set value, and the first simulation was performed.

4 is a graph showing the results of the first-order simulation.

As shown in FIG. 4, the first-order simulation results show the smallest objective function value at 1201th, and the values of the parameters corresponding to these values are exactly the same as those shown in [Table 1]. However, as shown in FIG. 4, it can be seen that there are many cases showing similar results in 2,401 case studies. In order to confirm this, the objective function values are summarized in order, and the other two cases with the smallest minimum value are also compared as shown in Table 3 below.

[Table 3]

Compared with the first case (No.1), the objective function value is close to zero for the remaining two cases, so all three cases have similar results. However, it can be seen that the mass of the balance weight and the length of the messenger are significantly different.

The three design candidates derived from the above are very similar in terms of resonance point, but they have different design specifications, so there is a great possibility that there is a difference in the important performance or durability of the damper. Therefore, it can be seen that the present objective function composed only of the resonance point has limitations and needs to be modified considering other design factors. For reference, the vibration energy D of the stock bridge damper can be expressed by the following equation (8).

&Quot; (8) &quot;

In Equation (8), it can be seen that the variables relating to the structural factors of the damper are messenger stiffness components expressed by kij, and the corresponding variables are proportional to L-3 by Equation (3). In the case of the attenuation factor (μ) of the messenger cable, since it corresponds to the property value, it is not relevant in the modification of the objective function. Therefore, the initial objective function is derived by adding the vibration energy characteristic factor of the damper (modification formula 6) considering the length information (L) of the messenger. Equation (6) is rewritten as follows.

&Quot; (6) &quot;

은 메신저 길이에 대한 항목의 가중치이다. 앞서 수행된 사례 연구와 마찬가지로 메신저 길이에 대한 가중치도 동일하게 '2'로 설정한 후 모든 설계 파라미터 조건에 대해 사례 연구를 진행하였으며 최적 설계안은 아래 [표 4]와 같다. Here, Lmin represents a 30% shorter messenger length than the reference,

Is the weight of the item with respect to the messenger length. As in the previous case study, the weight for the messenger length was also set to '2', and then a case study was conducted for all design parameter conditions. The optimal design is shown in Table 4 below.

[Table 4]

Simulation results show that the optimal solution is different from the result of the existing objective function, and the factor for the messenger length has a great effect. Therefore, considering the vibration energy reduction of the damper, the information of the design parameters obtained through the modified objective function is actually more useful.

In this case, case studies were conducted using the modified objective function for the four different simulation cases shown in [Table 2]. The objective function values of each case obtained through the simulation are shown in FIG. 5 below.

5 is a graph showing objective function values of the simulation result performed by the modified objective function.

In the case of the four cases, the case where the objective function is the smallest is obtained by comparing the values of the objective functions derived in FIG. In the modified objective function condition, the combination of the optimal values for the four cases is found and the following [Table 5] to [Table 8] are summarized. If we look at the three design parameter information for each case, it can be seen that there is not a large difference in the value of the objective function. The matching degree of the resonance point is preferably set to a target value as much as possible, but does not require strictness. Therefore, the designer does not have to select the first case in view of the other characteristics of the damper.

[Table 5]

[Table 6]

[Table 7]

[Table 8]

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1: Stock bridge damper parameter setting device
100: Messenger 200: Central

Claims (13)

A modeling unit for generating a stock bridge damper model using the inputted stock bridge damper parameters;
A resonance point calculation unit for deriving a resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model; And
And a parameter setting unit for setting a stock bridge damper design parameter that determines resonance points of the stock bridge damper model after deriving an objective function from the stock bridge damper model,
The modeling unit,
The load bridge variable damper according to any one of claims _{1 to} 3, wherein the load bridge variable damper has a variable load state variable x ₁ , a load state variable x ₂ , a load weight m, a load moment J, Wherein the stock bridge damper parameter setting device is configured to model the stock bridge damper using the site length l, the center of gravity G of the load, the position O of the meshing engagement portion, and the instantaneous stiffness k.
delete [2] The apparatus of claim 1,
The damper model equation of modeled stock bridge damper

, Where F (V) is an external force.
The method according to claim 1,
The eigenvalue analysis equation for the eigenvalue analysis of the resonance point calculator includes:

ego,
Here, λ is λ1, λ2 and, k11 = 4k, k12 = k21 = 2kL, k22 = (4kL 2/3) the Stock bridge damper parameter setting device.
5. The resonator according to claim 4,
From the eigenvalue analysis equation,

The resonance point of the stock bridge damper.
6. The apparatus of claim 5,
The load weight (m), the total length (L) of the messenger, the length (1) of the mesh fastening portion (1), and the load (1) of the stock bridge damper design parameters determining the resonance points of the stock bridge damper model after deriving the objective function from the resonance points (I _G ) of the stock bridge damper.
7. The method of claim 6,

ego,
Wherein? 1 and? 2 are resonance points,? And? Are frequencies of resonance points, w is a weight for a resonance point, and n is a messenger length.
The apparatus according to claim 7,
After setting the weight to '2', an initial value for the design bridge bridge damper design parameters is set, and the allowable range of the design parameters is varied within a predetermined value range around the reference value, and a predetermined number of resonance points And to set design parameters of resonance points having a minimum value among a predetermined number of resonance points for each resonance point to a stock bridge damper design parameter.
A modeling process of generating a stock bridge damper model using the stock bridge damper parameters input by the modeling unit;
A resonance point calculation step of deriving a resonance point (? 1,? 2) expression of the stock bridge damper model generated by calculating eigenvalues by performing eigenvalue analysis on the stock bridge damper model; And
And setting a stock bridge damper design parameter for deriving an objective function from the stock bridge damper model and determining resonance points of the stock bridge damper model,
In the modeling process,
The load bridge variable damper according to any one of claims _{1 to} 3, wherein the load bridge variable damper has a variable load state variable x ₁ , a load state variable x ₂ , a load weight m, a load moment J, A stock bridge damper parameter setting method for modeling a stock bridge damper using a part length (l), a load center of gravity (G), a messenger joint position (O), and a messenger stiffness (k).
delete [12] The method of claim 9,
The damper model equation of modeled stock bridge damper

, Wherein F (V) is an external force.
12. The method of claim 11,
The eigenvalue analysis equation for the eigenvalue analysis is expressed as

Lt; / RTI &gt;
From the eigenvalue analysis,

Lt; RTI ID = 0.0 &gt;
Here, λ is λ1, λ2 and, k11 = 4k, k12 = k21 = 2kL, k22 = (4kL 2/3) the Stock bridge damper parameter setting method.
The method of claim 12,
The load weight (m), the total length (L) of the messenger, the length (1) of the mesh fastening portion (1), and the load (1) of the stock bridge damper design parameters determining the resonance points of the stock bridge damper model after deriving the objective function from the resonance points A negative moment of inertia (I _G )
The above-

And then,
After setting the weight to '2', an initial value for the design bridge damper design parameters is set. The allowable range of the design parameters is varied within a range of a predetermined value around the reference value, and a predetermined number of resonance points are derived And sets the design parameters of the resonance points having the minimum value among the predetermined number of resonance points for each resonance point as the stock bridge damper design parameters,
Wherein? 1 and? 2 are resonance points,? And? Are frequencies of resonance points, w is a weight for a resonance point, and n is a messenger length.

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