JP2936594B2 - Structure reaction force management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention manages a reaction force at a support point of a structure to inspect a shape unique to the structure, and an error in manufacturing the structure. The present invention relates to a method for managing a reaction force of a structure supported by a posture of a natural body in which a turbulence appears.

[Problems to be Solved by the Prior Art and the Invention] The present applicant has previously proposed a "method for managing reaction force of a structure" (Japanese Patent Laid-Open No. 63-261120).

The “reaction force management method for structures” in this proposal is to place and support a structure such as a long tower block on multiple jacks, and control the pushing force of each jack. This is a method of supporting a structure in a posture of a natural body where a manufacturing error has appeared, and by supporting the structure in a posture of a natural body where such a manufacturing error has appeared, it is possible to recognize a shape unique to the structure. I do.

The present invention has been made in connection with such a technology, and controls a plurality of jacks supporting a structure in a related manner so that the structure can be safely and promptly removed from the natural body without greatly tilting the structure. An object of the present invention is to provide a method for managing a reaction force of a structure that can be supported in a posture.

[Means for Solving the Problems] A method for managing a reaction force of a structure according to the present invention is to manufacture a structure by managing a reaction force at a support point of the structure in order to inspect a shape unique to the structure. This is a method for managing the reaction force of a structure that supports the posture of the natural body where the above error has appeared, and supports the structure to be managed on a plurality of jack devices located on the horizontal plane, supporting it, and manufacturing without error Assuming an ideal structure at the time of doing, from the weight distribution of the ideal structure, the theoretical structure in each jack device when the ideal structure is placed on the plurality of jack devices A reaction force is obtained, and in a state where a structure is placed on the plurality of jack devices, a difference between a current jack pressure and the theoretical reaction force is calculated for each jack device. The target reaction force is calculated from the ratio with the above reaction force, and the target A jack device is selected, and in the selected jack device, the current jack pressure is raised or lowered by a predetermined unit amount so as to approach the target reaction force. The jack pressure of the jack device is brought close to the target reaction force.

[Operation] The present invention utilizes the following basic principle.

For example, if a structure is floating in outer space,
Since the structure is not constrained at all by the surroundings, if the structure has a natural shape unique to the structure, that is, if there is a manufacturing error in the structure, a difference appears thereafter. The present invention simulates such a natural shape on the ground.

Assuming that the structure is manufactured without error (hereinafter referred to as "ideal") and that the bottom surface is a perfect plane having no curvature and no distortion, the bottom surface of the structure has a plurality of points, for example, four points. In the case of supporting at the support points, the support reaction force at each support point is theoretically obtained from the position of each support point and the weight distribution of the structure.
When the structure is actually supported at the same support point positions and support reaction forces as above, the structure is supported by its own unique form without being restrained by twisting or the like from the support reaction force. Will be done. However, gravity causes deflection between support points due to gravity, but this can be minimized by adjusting the number or position of the support points or by using a rigid part in the structure as a support point. In addition, it is possible to feed back to the shape recognition of the structure by analyzing the amount of deflection.

Based on such a principle, even if there is a manufacturing error in the structure, if the structure is supported by the same support point position and support reaction force as described above, the structure is not restricted by twisting or the like from the support reaction force, Manufacturing errors appear, and the unique form of the device is reproduced. In the present specification, the reproduction of the unique form of the structure is hereinafter referred to as "unstressed natural body" as appropriate, assuming that stress such as torsion does not act on the structure due to the supporting reaction force.

By the way, when a structure is placed on a surface plate (a rigid body and the mounting surface is flat), the structure is in a state of being adjusted to the surface plate by its own weight. Due to stress, even if there is a manufacturing error, it does not appear on the outer shape. Therefore, if the structure is simply supported at a plurality of points, the structure is supported in a state where it is adjusted to the respective support points, as in the case where the structure is mounted on the surface plate. As a result, even if there is a manufacturing error, the structure does not appear on the outer shape.

The present invention reproduces the unique form of the structure itself, calculates the difference between the current jack pressure and the theoretical reaction force for each jack device, and calculates the difference and the theoretical reaction force. Determine the ratio with the force, select the jack device with the largest ratio, that is, the jack device that most effectively affects the reaction force management of the structure, and raise or lower the jack device by a predetermined unit amount. repeat.

Then, the plurality of jack devices are relatedly controlled by such repetition, and the posture of the natural body can be safely and promptly reduced to a stress-free state without greatly tilting the structure.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In this embodiment, the main tower block W of the long bridge as shown in FIG. 1 is a structure to be subjected to the reaction force management. In FIG. 1, the main tower block (hereinafter, simply referred to as a “block”) W is in a horizontal position, and a plurality of the main tower blocks are connected in the vertical direction with the X direction in the figure as the vertical direction. It constitutes the main tower of the long bridge. In the block W, the upper and lower surfaces that are vertically overlapped are touch surfaces that abut against each other.

In FIG. 1, reference numeral 1 denotes a mounting table, and 2 denotes a plurality of jacks (hydraulic servo cylinders).
The block W is placed horizontally on the top, and the pushing force of each jack 2 is controlled by the system controller 3.

In the following, as shown in FIG.
The control of the jacks 2 will be described with reference to the flowchart of FIG. 3, taking as an example a case where the blocks W are placed on 1,2-2,2-3,2-4.

In performing the control, first, a menu screen is displayed on a display (step S1). This menu screen is for requesting setting information required in later processing. The setting information will be described later.

Next, the allowable pressure ratio Rmax and the maximum number of retries Nrt are input from the console (step S2). These input information will be described later.

Next, from the weight distribution of the ideal block W, the target reaction force (kg / cm ² ) at each jack 2 when the ideal block W is placed on the four jacks 2 is set. (Step S3). The target reaction force is
Each jack 2
Corresponds to the pressure required for Therefore, the target reaction force is set to the target pressure value Pon of each jack 2-1, 2-2, 2-3, 2-4.
(N = 1, 2, 3, 4).

Next, the value of the number of retries Nr is reset to "0", and the value of the pressure ratio RP to be compared is set to "1" (step S4). The pressure ratio RP will be described later.

Next, the pressure (kg / cm ² ) currently received by each jack 2-1, 2-2, 2-3, ^2-4 is detected, and is detected as the current pressure value Pin.
(N = 1, 2, 3, 4) is input (step S5).

Next, for each jack 2, the target pressure Po
The pressure ratio Rpn (n = 1, 2, 3, 4) is obtained by substituting n and the current pressure value Pin (step S6).

 Rpn = (Pin−Pon) / Pon where n = 1, 2, 3, 4.

The above equation determines the difference between the target pressure value Pon and the current pressure value Pin for each jack, and calculates the difference and the target pressure value Pon
To calculate the ratio.

Next, the pressure ratio Rpn for each jack 2 (n = 1, 2,
3,4) and select the one with the largest absolute value,
The selected value is defined as the maximum pressure ratio RPmax, and the number of the jack 2 showing the maximum pressure ratio RPmax (n = 1, 2, 3, 4)
Is stored as the control jack number NM (step S
7).

Next, the absolute value of the maximum pressure ratio RPmax and the value of Step S2
Compare with the allowable pressure ratio Rmax input in (Step S
8) If the former value exceeds the latter value, it is determined that the reaction force management has not been completed, and the process proceeds to step S9. on the other hand,
When the former value does not exceed the latter value, it is determined that the reaction force management has been completed, and various data Po are displayed on the display.
The completion is displayed together with n, Pin, and Ppn (n = 1, 2, 3, 4) (step S10), and the return force is input from the keyboard to terminate the reaction force management (step S11, 1).
2). Therefore, the allowable pressure ratio Rmax means a reference value for determining whether or not the reaction force management has been completed.

In step S9, which proceeds after judging that the reaction force management is not completed, the absolute value of the maximum pressure ratio RPmax and the
Compare the pressure ratio RP of the comparison target set in 4 and, if the former value is smaller than the latter value, determine that the reaction force management is proceeding in a good direction and proceed to step S13, On the other hand, if the former value is equal to or greater than the latter value, it is determined that the reaction force management is proceeding in a bad direction, and the process proceeds to step S14. Initially, the pressure ratio RP to be compared is ideal “1” in step S4
, The process inevitably proceeds to step S13.

In step S13, the value of the number of retries Nr is reset to "0", and then the process proceeds to step S15, where the absolute value of the maximum pressure ratio RPmax is stored as the next comparison target pressure ratio RP. Naturally, the value is smaller than “1”.

On the other hand, in step S14, the value of the number of retries Nr is counted up by “1”, and then the counted number of retries Nr is compared with the maximum number of retries Nrt input in the previous step S2 (step S14). S15). As a result, when the former value has not reached the latter value, the process proceeds to the previous step S15. On the other hand, when the former value reaches the latter value, the reaction force management ends due to an error, an alarm is set (step S17), and the process proceeds to the previous step S10. In this step S10, various data Pon, Pin, R
An error is displayed together with pn (n = 1, 2, 3, 4). Therefore, the maximum number of retries Nr means the maximum number of retries when the reaction force management is proceeding in a bad direction.

The process proceeds from step S15 to step S18, where it is determined whether the value of the maximum pressure ratio RPmax is “positive” or “negative”. When the maximum pressure ratio RPmax is "positive", the process proceeds to step S19, and the jack 2 indicating the maximum pressure ratio RPmax, that is, the jack 2 corresponding to the control jack number NM is lowered by one pulse control amount. For example, if the unit expansion / contraction amount corresponding to one pulse control amount is 0.05 mm, the unit is lowered by that 0.05 mm. Thereafter, the process returns to the previous step S5.

On the other hand, when the maximum pressure ratio RPmax is “negative”, the process proceeds to step S20, and the jack 2 indicating the maximum pressure ratio RPMAX is raised by one pulse control amount. For example, if the unit expansion / contraction amount corresponding to one pulse control amount is 0.05 mm, the amount is increased by 0.05 mm. Thereafter, the process returns to the previous step S5.

As described above, the jack 2 showing the maximum pressure ratio RPMAX
Is selected, the selected jack 2 is raised or lowered by a predetermined unit amount, and then the maximum pressure ratio RPmax is calculated again, and the jack 2 showing the maximum pressure ratio RPmax is again selected and raised or lowered. The control for lowering is repeated.
After all, the operation of selecting the jack 2 that most effectively affects the reaction force management of the block W and controlling the expansion and contraction of the jack 2 by a small amount is repeated.

Then, by such repetitive control, the jack pressure of each jack 2 is brought close to the theoretical reaction force of the ideal block W, and the block W is set to a posture of a stress-free natural body. In FIG. 1, reference numeral 4 denotes a three-dimensional coordinate measuring device for obtaining recognition data of the shape of the block W.

[Effects of the Invention] As described above, the structure reaction force management method of the present invention calculates, for each jack device, the difference between the current jack and the theoretical reaction force, and calculates the difference and the aforementioned difference. Determine the ratio with the theoretical reaction force, select the jack device with the largest ratio, that is, the jack device that most effectively affects the reaction force management of the structure, and raise or lower the jack device by a predetermined unit amount. Since the lowering operation is repeated, the plurality of jack devices are relatedly controlled, and the posture of the natural body without stress can be safely and promptly obtained without greatly tilting the structure.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment of the present invention, FIG. 1 is an explanatory view of a reaction force management work situation of a structure, FIG.
The figure is a schematic explanatory view when the structure is supported by four jacks, and FIG. 3 is a flowchart for explaining the reaction force management method when the structure is supported by four jacks. 1 ... mounting table, 2 ... jack, 3 ... system controller, 4 ... 3D coordinate measuring device, W ... block (structure).

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaaki Matsuba 3-2-16-1 Toyosu, Koto-ku, Tokyo Ishikawa-jima-Harima Heavy Industries, Ltd. Toyosu General Office (72) Inventor Sumio Asano 5-chome Mitsumachi, Kure-shi, Hiroshima Prefecture No. 17 Ishikawajima-Hari Ma Heavy Industries Co., Ltd.Kure Shingu Factory (72) Inventor Takayoshi Tadashi Chopsticks 1 Shinnakahara-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Ishikawajima-Harima Heavy Industries Co., Ltd. 4-19-30 Kita-suna 4-chome No. 504 (58) Field surveyed (Int. Cl. ⁶ , DB name) E01D 21/00 E01D 19/02 G01M 19/00 E04H 12/08

Claims (1)

(57) [Claims] 1. In order to inspect a shape inherent to a structure, a reaction force at a support point of the structure is managed, and a reaction force of a structure supporting the structure in a posture of a natural body in which an error in manufacturing appears. A force management method, wherein a structure to be managed is mounted and supported on a plurality of jack devices located on a horizontal plane, and an ideal structure when manufactured without error is assumed. From the weight distribution of the structure, the theoretical reaction force in each jack device when the ideal structure is placed on the plurality of jack devices is determined, and the structure is placed on the plurality of jack devices. In the loaded state, a difference between the current jack pressure and the theoretical reaction force is calculated for each jack device, and a target reaction force is calculated from a ratio of the difference to the theoretical reaction force. The jack device with the largest is selected and the selected jack device is Raising or lowering the current jack pressure by a predetermined unit amount so as to approach the target reaction force, and then repeating the above operations (1) and (2) to bring the jack pressures of all jack devices closer to the target reaction force. A reaction force management method for a structure, characterized in that: