JP3074358B2 - Vibration test apparatus, vibration test method and vibration response analysis method for structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration test of a structure, and more particularly to a vibration test apparatus and a vibration test method for a structure which is suitable for a large-scale structure in which a load generated therein largely fluctuates in a short time. About. Further, the present invention relates to a method for analyzing a vibration response of a structure including a member in which a load generated therein largely varies in a short time.

[0002]

2. Description of the Related Art In a conventional vibration test apparatus for a structure, the evaluation of the vibration response when the structure is vibrated by an earthquake or the like is performed by mounting the whole structure on a shaking table and vibrating. It was done. However, when the structure is very large, it may be difficult to put the whole thing on the shaking table due to limitations on the allowable load of the shaking table and the like. In such a case, the vibration response is performed by using the excitation test using the excitation target structure of the scale model that can be mounted, performing the excitation test on only a part of the structure, or applying both. Was being evaluated. However, the former has problems such as difficulty in completely satisfying the similarity rule at the time of scale modeling, and the latter has a problem in that the excitation vibration itself is coupled with the response of the structure to be tested. There are problems such as difficult evaluation. Therefore, only a part of the structure is vibrated, the other part is converted into a numerical model, the vibration response at the boundary is calculated by a digital computer, and the real model is then vibrated and further numerically modeled using the reaction force. A vibration test method for evaluating the response of a structure has been considered.

A vibration test method in which a part of a structure is vibrated by using a real object or a model and the other part is numerically modeled and a response is calculated by a digital computer is disclosed in Japanese Unexamined Patent Publication No.
JP-A-344438 and JP-A-61-132835. In addition, a vibration test apparatus and a vibration test method for performing a test in real time or measuring a reaction force at regular intervals have been proposed for a structure that can be generally applied to an installation device or a structure.

[0004]

In a conventional vibration test apparatus and a conventional vibration test method, as described in JP-A-61-34438 and JP-A-61-132835, the time axis is actually measured. The displacement is given by the actuator in a larger scale. Therefore, the reaction force depending only on the displacement can be accurately evaluated, but the reaction force depending on the speed such as the viscous damping force cannot be evaluated. In the latter case, an actuator that applies a load to simulate the inertial force is provided, so the reaction force that depends on acceleration is evaluated. There is a problem that the structure which cannot be converted becomes inaccurate. In order to solve such a point, a method has been proposed in which the boundary point between the excitation target structure and the numerical modeled structure is excited in real time, but this method measures the reaction force at fixed time intervals. Therefore, there is a problem that the evaluation of the vibration response becomes inaccurate when a reaction force that changes faster than the time interval, for example, a slip or a collision occurs in the installation device. In order to accurately evaluate the vibration response using these conventional techniques when there is a reaction force having a rapid change in time, the time step of the calculation of the vibration response may be made sufficiently small with respect to the change in the reaction force with time. However, there is a limit, and the time step cannot be made smaller than the calculation time required for evaluating the vibration response of the numerically modeled structure.

An object of the present invention is to provide a large-sized structure,
It is an object of the present invention to provide a vibration test apparatus, a vibration test method, and a vibration response analysis method for a structure capable of accurately evaluating a vibration response even when a reaction force has a very quick change in time inside the structure.

[0006]

In order to achieve the above object, a vibration test apparatus for a structure according to the present invention comprises: a structure to be excited in which a part of the structure is modeled using a real object or a model; At least one actuator that excites a boundary point of a target structure with a numerical modeled structure obtained by numerically modeling other parts of the structure, a control device that controls each actuator, and a numerical modeled structure The reaction force generated in each actuator in a structural vibration test device consisting of a digital computer that calculates the vibration response at the boundary point and outputs an excitation signal calculated from the calculated value of the vibration response to the control device Product measuring means and communication means for inputting the impulse measurement value to the digital computer. It was calculated, a structure that includes means for outputting a vibration signal to realize the vibration response by the respective actuator after a predetermined time.

[0007] The boundary point of the excitation target structure between the excitation target structure obtained by modeling a part of the structure using a real object or a model and a numerical modeled structure obtained by numerically modeling the other part of the structure. At least one actuator that excites, a control device that controls each actuator, and an excitation signal that calculates a vibration response of the boundary point of the numerical modeling structure and that is calculated by the control device from the calculated value of the vibration response. first in the vibration testing apparatus further comprising a structure with a digital computer, each of the load transducer that measures the reaction force generated in the actuator and the analog outputs of the - digital
Having a converter and being time managed by a first digital computer
A second become more impulse measuring means and a digital computer were, a communication means for inputting the impulse measurements to the first digital computer, the first digital computer, using the impulse per predetermined time To calculate the vibration response of the boundary point a certain time ahead,
Means for outputting a vibration signal for realizing the vibration response by each actuator after a certain time, wherein the second digital computer is connected via the analog-digital converter at a time step smaller than the time step of the vibration response calculation. A configuration may be provided that includes means for integrating the input load values.

[0008] Further, the first digital computer, analog -
Comprising a digital converter, a second digital computer, digital <br/> Tal - an analog converter, the input of the impulse measurement to the first digital computer, said second digital computer Digital - the voltage signal output by the analog converter first
May be input to the analog - digital converter of the digital computer.

Further, the communication means for inputting the impulse measurement value to the first digital computer is such that the second digital computer writes the impulse measurement value in a memory accessible by the two digital computers simultaneously, The value may be read by a first digital computer.

[0010] The first digital computer may be configured to be capable of parallel processing, and the processing of two digital computers may be performed by one computer.

In the vibration test method for a structure, a part of the structure is modeled as a structure to be vibrated using a real object or a model, and the other part of the structure is numerically modeled into a numerical model structure. The boundary point between the vibration target structure and the numerical modeled structure is calculated by at least one actuator using a digital computer.The numerical response is calculated by a single actuator using the vibration response at the boundary point of the numerical modeled structure calculated using a digital computer. In the vibration test method for a structure to be excited based on the following, the impulse of the reaction force generated in each actuator is measured, and the impulse measurement value is input to a digital computer. Is used to calculate the vibration response at the boundary point ahead of a certain time, and to realize the vibration response for each actuator after a certain time The calculated output constituting the.

Further, in the method of analyzing the vibration response of a structure, a part of the structure is modeled as a target structure using a real object or a model, and the other part of the structure is numerically modeled into a numerical modeled structure. The vibration response of the numerical modeled structure is calculated by a digital computer, and based on the vibration response, the boundary point between the structure to be excited and the numerical modeled structure is excited by at least one actuator, and the vibration response of the boundary point is calculated. Analyze, in the vibration response analysis method of the structure to analyze the vibration response of the numerical modeled structure after a certain period of time using the results, in the impulse measurement value by integrating the reaction force generated in each actuator, The impulse measurement value is input to a digital computer, and the digital computer is configured to analyze the vibration response of the numerical modeled structure at a certain time ahead using the impulse at a certain time. .

[0013]

According to the present invention, since the impulse of the reaction force is obtained by integrating the reaction force generated at every certain time interval of the vibration response calculation, the numerical modeling using the impulse of the reaction force is performed. The vibration response of the structure will include all the effects of the reaction force in that time. Therefore, even if the time step of the vibration response calculation is larger than the time change of the reaction force, the vibration response can be evaluated with sufficient accuracy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, a structure 1 to be excited which is modeled by using a real part or a model of a part of the structure, and numerical values of the structure 1 to be excited and other parts of the structure At least one actuator 2 mounted at a boundary point 10 with the modeling structure 9, a control device 3 for controlling each actuator 2, a vibration response of the boundary point 10 is calculated, and the control device 3 Digital computer 4 that outputs an excitation signal calculated from the calculated value of the vibration response
The vibration test apparatus for a structure consisting of
The actuator 2 is attached to the. The actuator 2 is controlled by the control device 3. The digital computer 4 inputs the impulse measurement value measured by the impulse measuring means 7 using the signal of the load transducer 6 through the communication means 8 and uses the impulse measurement value to perform a predetermined time later. Calculate the vibration response value at the boundary point. This vibration response value is used as an excitation signal, and the actuator 2
Is input to the control device 3. The structure is as shown in FIG.
It is divided into an excitation target structure 1 and a numerical modeled structure 9, which are models that are modeled so that vibration characteristics are equivalent to those of an actual machine or a real object. Then, the vibration response of the boundary point 10 is realized by the actuator 2, and the vibration target structure 1
To excite.

A method of analyzing vibration response by impulse which can be applied to the present invention will be described. The equation of motion of the numerical modeled structure shown in FIG. 2 is as follows.

◎

(Equation 1)

Here, [M]: mass matrix of the numerical modeled structure, [C]: damping matrix of the numerical modeled structure, [K]: stiffness matrix of the numerical modeled structure, {X}: numerical modeled structure , {F}: an external force vector applied to the numerical modeled structure, {q}: a reaction force vector applied to the numerical modeled structure from the excitation target structure, and 'denotes time derivative. {F} is a known external force vector due to an earthquake or the like generated on the foundation of the structure.

Assuming that the vibration response of the structure is calculated at intervals of a certain time Δt, the displacement vectors at the (i−1) th step, the “i” th step, and the (i + 1) th step are {X} i−1 and {X} i, respectively. ,
{X} i + 1. When the displacement response between the i-1 step and the i + 1 step is interpolated by a quadratic function of time, the time at the i-th step can be expressed as the following equation, with t = 0.

[0020]

(Equation 2)

Accordingly, the speed and acceleration can be expressed by the following equations.

[0022]

(Equation 3)

[0023]

(Equation 4)

When Equation 1 is integrated in the section -Δt / 2 to Δt / 2, the following equation is obtained.

[0025]

(Equation 5)

Using equations (2) to (4),

[0027]

(Equation 6)

[0028]

(Equation 7)

[0029]

(Equation 8)

Therefore, when this is substituted into Equation 5 and rearranged,

[0031]

(Equation 9)

## EQU1 ##

According to this algorithm, the displacement vector {X} of the structure can be determined using the impulse vector {Q} of the reaction force vector {q} at the boundary point, and the displacement of the boundary point can be obtained. . The digital computer 4 uses the impulse of the reaction force applied from the excitation target structure 1 to the boundary point 10 of the numerical modeled structure 9 based on the above algorithm to calculate the vibration response (displacement and displacement) of the numerical modeled structure 9. / Or acceleration)
Has the function of calculating FIG. 3 is a conceptual diagram of a time table for executing the present algorithm and providing a vibration signal to the actuator control device. In this algorithm,
To obtain the displacement vector {X} i + 1 at time t + Δt, t−
An impulse between Δt / 2 and t + Δt / 2 is required. Therefore, assuming that the time required for the vibration response calculation is T, time t + Δ
The displacement vector {X} i + 1 is obtained only after t / 2 + T.
Therefore, as shown in FIG. 3, the excitation signal is output by, for example, interpolating with a straight line (output means).

According to the present embodiment, even if the structure cannot be mounted on the shaking table, the whole vibration response can be evaluated by performing a vibration test on a part. Even if the reaction force from the excitation target structure includes a component that changes very quickly with time, accurate vibration response evaluation is possible.

In the present embodiment, the vibration test is performed in only one place using the real model. However, the same test apparatus can be configured with two or more vibration tests. Further, the actuator 2 and the load converter 6 in FIG. 1 are configured in only one direction, but may be an actuator and a load converter having a maximum of six degrees of freedom according to the target structure. The six-degree-of-freedom actuator and the load converter include, for example, as shown in FIG. 4, six uniaxial actuators 21, a rotatable bearing 22, a load converter (not shown) provided in each of the actuators, Output F ₁ from load transducer
Coordinate Fx~Mθ being used to ~F ₆ in the calculation of the numerical model
It can be constituted by a device 23 that converts the displacements X to θx in the coordinates used for the calculation of the numerical model into the displacements d _{1 to} d ₆ of the actuator. Further, the number of actuators attached to one excitation target structure is not limited to two as shown in FIG. 1, but one, or three or more, depending on the model of the test target. It does not matter. Further, the vibration response at the boundary point is not limited to displacement, but may be speed, acceleration, and the like. The vibration response calculation means may use not only the above algorithm but also another appropriate calculation algorithm. That is, various configurations can be made without departing from the gist of the present invention.

Various methods are conceivable for the communication means for transmitting the vibration signal to the control device of the actuator. If the control device is a digital control device, a digital signal can be sent directly from the digital computer 4 to the control device 3 via the data bus 11 as shown in FIG. According to this method, there is no possibility that the accuracy is reduced due to the conversion of the data format.

When the control device has an analog signal input section, as shown in FIG. 6, a digital -to- analog converter 12 is provided in the digital computer 4 to convert the excitation signal into a voltage signal. Input to the control device 3. With this method, there is no need to provide a dedicated data bus or the like,
The versatility is high because existing actuators can be easily incorporated into the device.

Next, an embodiment of the impulse measuring means will be described with reference to FIG. The impulse measuring means is a load converter 6
And a second digital computer 15 having an analog-to - digital converter 14 for converting the voltage signal 13 from the load converter 6 into a digital value. The vibration response calculation of the first digital computer (digital computer) The clock pulse 16 is supplied from the first digital computer 4 in order to synchronize the clock pulse. The second digital computer 15 takes in the load value at a time interval δt smaller than the time interval Δt of the vibration response, and calculates the impulse for a necessary period by integrating the load values. According to this configuration, since the second digital computer 15 does not take charge of a complicated vibration response, the load value can be captured even at a very small time interval. Can be measured.

In the impulse measuring method, the output from the load converter may be obtained by using an integrating circuit of an analog computer, and the difference between the output values at the beginning and end of the impulse evaluation period may be obtained.

Various methods are conceivable for the means for inputting the measured value measured by the impulse measuring means to the digital computer.
FIG. 8 shows one embodiment. Second digital computer 15
In digitally integrated to give the force product - converted into a voltage signal 17 by an analog converters, analog provided it to the first digital computer 4 - inputting digital converter.

FIG. 9 shows another embodiment. In addition to the first and second digital computers, the two digital computers have a memory 18 which can be accessed, and the second digital computer writes the impulse measurement value obtained by integration, and the first digital computer reads. The input is performed.

Further, as shown in FIG. 10, the first digital computer may be a computer 40 capable of parallel processing, and the processes of the two computers may be performed in parallel by two CPUs in the same computer. is there. That is, the CPU 41 that executes the process in charge of the first digital computer
And the CPU 151 that performs the process in charge of the second digital computer performs parallel processing, and transfers the impulse measurement value using the data bus in the computer. Further, as shown in FIG. 11, a memory 18 accessible by two digital computers may be provided in the computer 40.

According to the embodiment described above and other configurations of the present invention, the vibration response calculation and the control of the actuator required for the present invention can be performed at a high speed, and the vibration test of the structure can be performed with high accuracy. be able to.

Further, not only the boundary points but also the other parts of the numerical model are calculated by the digital computer at the same time, and are stored in the internal memory or the external memory of the digital computer, so that the vibration response calculation of the entire structure can be performed. It can be carried out. It is also possible to store the impulse of the measured reaction force in a memory and evaluate the vibration response of a necessary portion by using the impulse record after completing a series of vibration experiments. .

Further, another embodiment of the present invention will be described with reference to FIG. This is an embodiment applied to the seismic evaluation of the fast breeder reactor core structure. Fig.12 Fast breeder reactor
As shown in FIG. 7, a tank called a main container 50 is fixed to a roof slab 52, and the roof slab 52 is supported by a foundation 53. The core structure 51 is installed in the main vessel 50. It is necessary to perform a shaking table test for the evaluation of the seismic resistance of the core structure 51. However, the input of the support part of the core structure 51 has been transmitted from the foundation 53 via the roof slab 52 and the main vessel 50 by seismic waves. Things. In addition, the earthquake waveform of the foundation 53 may have passed through a route called a building. During the transmission process, vibration coupling between the core structure and other structures occurs. Therefore, it is impossible to uniquely determine the acceleration of the core structure supporting portion from the earthquake input without the response of the core structure 51.

Further, as shown in the sectional view of FIG. 13, the core structure 51 has a number of hexagonal cross-section core components 54 housed in a core tank 55. Core component 54
Are inserted into the core support plate 58 and have a cantilever structure. In addition, it has a projection called a pad 57 and transmits a collision force when vibration occurs due to an earthquake or the like. The core tank 55 is provided with a support called a restraint frame 56 so that the displacement of the core component 54 is not excessive. The core structure and other structures include a core support plate 58.
And the collision force generated in the restraint frame 56. FIG. 15 shows that the core component 5 by external force (acceleration) is shown.
4 shows an example of the collision force generated. Collision part numbers 1 and 12 in the figure are pulse-like collision forces generated in the constraint frame 58. Therefore, the collision force cannot be measured with sufficient accuracy in the time step usually used for calculating the vibration response, for example, 10 ms. Therefore, the configuration of the vibration test apparatus as shown in FIG. 16 may be used. In this example,
The vibration table 59 driven by the actuators 2a to 2c is used as an actuator. The impact force generated in the core structure 51 is also evaluated by measuring the impulse. Therefore, the vibration response of the peripheral structure due to the vibration of the core structure 51 can be accurately evaluated, and the vibration can be realized by the shaking table 59. Therefore, the evaluation and calculation of the vibration response of the core structure and the entire structure including the core structure are sufficient. It can be implemented with high accuracy.

Further, another embodiment will be described with reference to FIG. This is an example applied to vibration evaluation of a building structure supported by seismic isolation. FIG. 17 is an explanatory view of the building structure 60 supported by seismic isolation. The building structure 60 is supported on a foundation 62 via a seismic isolation element 61. Seismic isolation element 61
Is, for example, as shown in FIG.
3 and a friction damper 64. Further, the friction damper 64 reduces the displacement of the building structure 60 by the friction force generated between the two friction members 65. Here, since the static friction force is generated, no relative deformation occurs between the building structure 60 and the foundation 62 until the inertial force due to the earthquake acting on the building structure 60 exceeds the static friction force of the friction damper 64. However, once the displacement occurs, the frictional force is changed to a dynamic frictional force, so that the effect of the frictional force and the friction damper is slightly reduced. Therefore, the movement of the building structure 60 and the change of the reaction force become very fast. Therefore, the configuration of the test apparatus as shown in FIG. 19 is adopted. That is, an actuator 2a that simulates horizontal vibration and an actuator 2b that simulates vertical vibration related to frictional force are used, and the reaction force measurement values of both are input to the digital computer via the impulse measurement device 7. According to this embodiment, a high-speed change of the reaction force can be analytically evaluated, so that a vibration test of the seismic isolation element 61 and a vibration response analysis of the entire structure can be performed with high accuracy.

[0048]

According to the present invention, the vibration response can be evaluated by vibrating a real part or a model of a part of the structure.
Accurate evaluation of vibration response is possible even for large-scale structures. Further, even if there is a portion in the structure that generates a reaction force having a rapid change in time, it is possible to accurately evaluate the vibration response at a realizable time interval larger than the time change.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a vibration test apparatus showing one embodiment of the present invention.

FIG. 2 is a diagram illustrating modeling of a structure.

FIG. 3 is a diagram showing a time table for executing a calculation algorithm according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a six-degree-of-freedom actuator and a load converter showing another embodiment of the present invention.

FIG. 5 is a diagram showing an embodiment of a communication unit of an excitation signal of the present invention.

FIG. 6 is a diagram showing another embodiment of the communication means of the excitation signal of the present invention.

FIG. 7 is a diagram showing one embodiment of an impulse measuring means of the present invention.

FIG. 8 is a diagram showing one embodiment of an impulse measurement value communication means of the present invention.

FIG. 9 is a diagram showing another embodiment of the impulse measurement value communication means of the present invention.

FIG. 10 is a diagram showing an embodiment of a digital computer according to the present invention.

FIG. 11 is a diagram showing another embodiment of the digital computer of the present invention.

FIG. 12 is a schematic view of a side view of a fast breeder reactor.

FIG. 13 is a sectional view of a fast breeder reactor.

FIG. 14 is a diagram showing fast breeder reactor core components.

FIG. 15 is a diagram illustrating an example of a collision force generated in a core component.

FIG. 16 is a view showing one embodiment of a vibration test apparatus for a fast breeder reactor core.

FIG. 17 is a diagram illustrating a building structure supported by seismic isolation.

FIG. 18 is a diagram illustrating the structure of a seismic isolation element.

FIG. 19 is a view showing one embodiment of a vibration test device for a seismic isolation element.

[Description of Signs] 1 Excitation target structure, 2 Actuator, 3 Control device, 4 Digital computer, 5 Excitation signal communication means, 6 Load converter, 7 Impulse measurement means, 8 Impulse measurement value communication means , 9 numerical modeling structure, 10 boundary point, 11 data bus, 12 digital-analog converter, 13 voltage signal, 14 analog-digital converter, 15 second digital computer, 16 synchronization signal, 18 memory, 21 uniaxial Actuator,
Reference Signs List 22 rotatable bearings, 40 digital computer capable of parallel processing, 41 process in charge of first digital computer, 50 main vessel, 51 core structure, 52 roof slab, 53 foundation, 54 core components, 55
Core tank, 56 restraint frame, 57 pad, 58 core support plate, 59 shaking table, 60 building structure, 61
Seismic isolation element, 62 foundation, 63 laminated rubber, 64
Friction damper, 65, 66 friction material,

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-34438 (JP, A) JP-A-1-221630 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 7/02

Claims (7)

(57) [Claims] 1. An excitation target structure comprising: an excitation target structure obtained by modeling a part of a structure using a real object or a model; and a numerical modeled structure obtained by numerically modeling another part of the structure. At least one actuator that vibrates the boundary point, a control device that controls each actuator, a vibration response of the boundary point of the numerical modeling structure is calculated, and the control device calculates a vibration response from the vibration response. In a vibration test apparatus for a structure including a digital computer that outputs a calculated excitation signal, an impulse measuring unit for a reaction force generated in each actuator, and communication for inputting the impulse measurement value to the digital computer Means for calculating the vibration response of the boundary point at a certain time ahead by using an impulse at a certain time, and after each certain time, A vibration test apparatus for a structure, comprising: means for outputting the excitation signal for realizing the vibration response by an eta. 2. The excitation target structure comprising: an excitation target structure obtained by modeling a part of a structure using a real object or a model; and a numerical modeled structure obtained by numerically modeling another part of the structure. At least one actuator that vibrates the boundary point, a control device that controls each actuator, a vibration response of the boundary point of the numerical modeling structure is calculated, and the control device calculates a vibration response from the vibration response. In a vibration test apparatus for a structure comprising a first digital computer for outputting a calculated excitation signal, a load converter and an analog for measuring a reaction force generated in each actuator are provided.
A digital-to-digital converter having a digital-to-digital converter
And become more impulse measuring means more time controlled second digital computer, and a communication means for inputting the impulse measurements to the first digital computer, said first digital computer, a certain time Means for calculating the vibration response of the boundary point ahead of a predetermined time using the impulse of each, and outputting the excitation signal for realizing the vibration response by each actuator after a predetermined time, the second A digital computer, comprising: means for integrating a load value input via the analog-digital converter at a time interval smaller than the time interval of the vibration response calculation. . In the vibration testing apparatus 3. A process according to claim 2 structure wherein the first digital computer, analog - with a digital converter, a second digital computer, digital - an analog converters, said first The input of the impulse measurements to the first digital computer is performed by the digital computer of the second digital computer.
- the voltage signal output by the analog converter first
A vibration test apparatus for a structure, wherein the vibration signal is input to an analog - digital converter of a digital computer. 4. The vibration testing apparatus for a structure according to claim 2, wherein the communication means for inputting the impulse measurement value to the first digital computer includes a second digital memory in a memory accessible by the two digital computers simultaneously. computer writes impulse measurements, vibration testing device of a structure characterized by the impulse measurement is to read the first digital computer. 5. The structure vibration testing apparatus according to claim 2, wherein the first digital computer is capable of performing parallel processing, and the processing of the two digital computers is performed by one computer. Vibration test equipment for objects. 6. A part of a structure is modeled as an excitation target structure using a real object or a model, and the other part of the structure is numerically modeled into a numerical modeled structure. In a vibration test method for a structure that vibrates based on a vibration response of the boundary point of the numerical modeled structure calculated by a digital computer by at least one actuator at a boundary point between the numerical modeled structure and each actuator, The impulse of the generated reaction force is measured, and the measured value of the impulse is input to the digital computer, and the digital computer calculates the vibration response of the boundary point at a certain time ahead by using the impulse at every fixed time. A vibration test method for a structure, comprising calculating and outputting a vibration signal for causing each actuator to realize the vibration response after a predetermined time. 7. A part of a structure is modeled as a structure to be excited using a real object or a model, and the other part of the structure is numerically modeled into a numerical modeled structure. The vibration response of the numerical modeled structure Is calculated by a digital computer, and based on the vibration response, a boundary point between the excitation target structure and the numerical modeled structure is vibrated by at least one actuator, and the vibration response of the boundary point is calculated. In a vibration response analysis method for a structure in which the vibration response of the numerical modeled structure after a certain time is analyzed using, a reaction force generated in each actuator is integrated into an impulse measurement value, and the impulse measurement value is obtained. Is input to the digital computer, and the digital computer analyzes the vibration response of the numerical modeled structure at a certain time ahead by using an impulse at a certain time. Vibration response analysis method.