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Method for measuring deformation of long-rod member under combined influence of gravity and temperature

A technology of gravity deformation and measurement method, which is applied in the field of geometric quantity measurement, can solve the problems that do not involve spacecraft measurement and separation, and achieves the effect of reducing burden, broad application prospects, and avoiding matrix operations.

Inactive Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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Problems solved by technology

However, this method does not involve the measurement and separation of the deformation of the spacecraft under the combined influence of gravity and temperature.

Method used

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  • Method for measuring deformation of long-rod member under combined influence of gravity and temperature
  • Method for measuring deformation of long-rod member under combined influence of gravity and temperature
  • Method for measuring deformation of long-rod member under combined influence of gravity and temperature

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Embodiment Construction

[0040] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0041] The long rod member selected in this embodiment is 900 mm long, 50 mm wide, and 5 mm thick, and the material is 2024 aviation aluminum; the left and right support blocks are 30 mm high, 20 mm wide, and the material is 45 steel. The model of the laser tracker 4 is Leica AT960MR, and its measurement uncertainty is U=±(15 μm+6 μm / m); the size of the target ball and the target seat used as the measurement point is 0.5 inch.

[0042] attached figure 1 is the flow chart of the measurement method. This method first establishes a simplified simulation model, selects the position of the measurement point on the long rod member based on the deformation curve obtained by the finite element simulation; and the coordinates under the simple support station, based on the geometric constraints of the two end measurement poi...

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Abstract

The invention discloses a method for measuring the deformation of a long rod member under the combined influence of gravity and temperature, belongs to the field of geometric quantity measurement, andrelates to a method for measuring the deformation of a long rod component under the combined influence of gravity and temperature. According to the method, the position of a measurement point on a long rod component is selected based on finite element simulation; then, coordinates of all the measuring points under the reference station and the simply supported station are obtained through a lasertracker, point column data under the two stations are matched on the basis of geometric constraints of the two end measuring points, and gravity deformation is solved; and finally, a light resistanceheating ring is used for carrying out equal-temperature interval heating on the long rod component, point column data are matched, and temperature deformation and composite deformation are solved. The method not only can measure the deformation of the long rod member under the combined action of the gravity field and the temperature field, but also can separate the influence of the independent action of the two physical fields. The method can be used for optimal arrangement of supporting points of long rod components, theoretical calculation of gravity and temperature deformation, inspectionof simulation results and the like.

Description

technical field [0001] The invention belongs to the field of geometric quantity measurement, and relates to a method for measuring the deformation of a long rod component under the compound influence of gravity and temperature. Background technique [0002] The long rod member refers to the member whose axial dimension is much larger than the cross-sectional dimension. It is one of the basic units of large-scale components and is widely used in important projects such as aviation assembly, automobile manufacturing, radio telescopes, and bridge construction. For example, trusses, as a long rod component that forms the aircraft fuselage structure, play important roles in supporting the skin, maintaining the aerodynamic shape of the aircraft, and bearing the axial force of the fuselage. Most of the long rod members used to keep the shape or bear the load adopt the simply supported installation method with both ends fixed. Due to their large axial dimension and weak rigidity, th...

Claims

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Application Information

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IPC IPC(8): G01B11/16G06F30/23G06F111/04
CPCG01B11/16G06F30/23G06F2111/04
Inventor 张洋李俊卿逯永康刘巍吕琦高昌勇司立坤
Owner DALIAN UNIV OF TECH
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