Structural topology-shape combined optimization method based on multi-arc-section curve under pressure load

A joint optimization and curve technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of poor practicability and achieve the effect of strong practicability

Active Publication Date: 2013-12-04
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0008] In order to overcome the shortcomings of poor practicability of existing structural topology-shape collaborative optimization methods under

Method used

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  • Structural topology-shape combined optimization method based on multi-arc-section curve under pressure load
  • Structural topology-shape combined optimization method based on multi-arc-section curve under pressure load
  • Structural topology-shape combined optimization method based on multi-arc-section curve under pressure load

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Embodiment Construction

[0042] refer to Figure 3-7 . The structure topology-shape joint optimization method under pressure load based on multi-arc curves in the present invention specifically includes the following steps.

[0043] The present invention will be described below by taking the load-bearing frame of the engine as an example.

[0044]Engine load-bearing frame 1 is the key load-bearing component in the engine, which bears complex loads, including the air flow pressure difference between the front and rear of the stator blade 2 and the load-bearing frame cross section 3, the axial force and torque of the air flow on the blade, and the maneuvering process, etc. Among them, the airflow pressure difference between front and back is the key load it bears.

[0045] The load-bearing frame 1 of the engine is a revolving body of the central axis 6 of the load-bearing frame, and its interface size is that the design domain 4 of the cross-section of the load-bearing frame is up to 40 mm, the radius...

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Abstract

The invention discloses a structural topology-shape combined optimization method based on a multi-arc-section curve under pressure load, and the structural topology-shape combined optimization method based on the multi-arc-section curve under pressure load is used for solving the technical problem that an existing structural topology-shape collaborative optimization method under pressure load is poor in practicality. According to the technical scheme, a NURBS spline interpolation value is adopted to describe the pressure load action boundary curve section, NURBS curve controlling points are shape design variables independent of the topological design variables; structural topology-shape combined optimization is conducted; after the optimization is conducted, the outline boundary needed to be machined and manufactured in a numerical-controlling mode is replaced by the multi-arc-section curve, and fine shape optimization is conducted on the outline of the multi-arc-section curve. The structural topology-shape combined optimization method based on the multi-arc-section curve under pressure load can carry out topology-shape combined optimization in the pressure load working condition, enables the outline of the optimized structure to be a multi-arc-section outline, is suitable for the numerical-control machining manufacturing technology, and is strong in practicality.

Description

technical field [0001] The invention relates to a structure topology-shape collaborative optimization method under pressure load. In particular, it relates to a structural topology-shape joint optimization method under pressure load based on multi-arc curves. Background technique [0002] refer to figure 1 , 2 . In aerospace, automobile manufacturing and other fields, a large number of components such as engine turbine disk load-bearing frame, structural lightweight design under pressure load is a typical engineering problem, such as engine turbine disk structural parts under aerodynamic pressure, internal pressure Pressure vessels, submarine structures under water pressure, dams, and building structures under wind or snow loads, etc., because the pressure changes with the shape of the loading surface of the structure, the difference from the general topology optimization problem is that it must be optimized simultaneously Design the loading surface and internal topology...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 谷小军朱继宏张卫红孟亮周莹
Owner NORTHWESTERN POLYTECHNICAL UNIV
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