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Collaborative Topology Optimization Method for Thin Plate Piezoelectric Smart Structures Based on Precise Deformation Control

A technology of topology optimization and deformation control, applied in constraint-based CAD, design optimization/simulation, electrical digital data processing, etc., can solve the problem of poor deformation accuracy of the overall structure, and achieve the effect of high-precision shape control

Active Publication Date: 2019-06-21
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the deficiencies of the existing piezoelectric intelligent structure topology optimization design method, the overall structural deformation accuracy is poor, the present invention provides a thin-plate piezoelectric intelligent structure cooperative topology optimization design method based on precise deformation control

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  • Collaborative Topology Optimization Method for Thin Plate Piezoelectric Smart Structures Based on Precise Deformation Control
  • Collaborative Topology Optimization Method for Thin Plate Piezoelectric Smart Structures Based on Precise Deformation Control
  • Collaborative Topology Optimization Method for Thin Plate Piezoelectric Smart Structures Based on Precise Deformation Control

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[0026] refer to Figure 1-4 . The specific steps of the collaborative topology optimization design method of thin-plate piezoelectric intelligent structure based on precise deformation control in the present invention are as follows:

[0027] (a) The initial positions of the piezoelectric smart components are (40, 33, 0), (150, -33, 0), (150, 33, 0), (150, -33, 0). The size of the substrate thin plate 1 is 204 mm in length, 140 mm in height, 1 mm in thickness, and 4 mm in non-design region width. Divide the finite element grid for the base thin plate, with a total of 7140 units: among them, the design domain 3 is divided into 6600 units, and the non-design domain 4 is divided into 540 units, and the design domain unit is assigned a pseudo density value of 0.5. The Young's modulus of the sheet material is 70Gpa, and Poisson's ratio is 0.32. The left end of the substrate sheet 1 is fixed to form a fixed boundary 5, and four pairs of rectangular piezoelectric smart components ...

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Abstract

The invention discloses a cooperative topology optimization design of thin-plate piezoelectric smart structures based on precise deformation control which is used for solving the technical problem of poor deformation precision of overall structure in present topology optimization design of piezoelectric smart structures. The technical scheme comprises following steps: firstly defining a target shape of the thin-plate piezoelectric smart structure deformation, selecting observation points, taking the error sum of squares of the actual deformation displacement and the target deformation displacement as a constraint, and taking the minimum flexibility of the piezoelectric smart structure as the goal. At the same time, the finite envelope circle method is adopted to avoid the geometric interference of the piezoelectric smart components. The sensitivity of the shape error function is obtained by the adjoint method. A piezoelectric smart component position layout and substrate structure topological configuration satisfying the deformation precision requirements are obtained through topological optimization. Because the relative error sum of squares of the observation point displacement is used as a constraint, compared with the background method, it is possible to more effectively control the deformation error of observation points with smaller target displacement and realize high-precision shape control.

Description

technical field [0001] The invention relates to a piezoelectric intelligent structure topology optimization design method, in particular to a thin-plate piezoelectric intelligent structure cooperative topology optimization design method based on precise deformation control. Background technique [0002] Document 1 "Design and testing for shape control of piezoelectric structures using topology optimization, Engineering Structures, 2015, Vol.97, p90-104" proposes a piezoelectric smart structure topology optimization design method based on moving isosurface thresholds. This method aims at the cantilever thin plate structure integrated with piezoelectric materials. By minimizing the shape error function, the error between the actual deformation surface and the target surface is reduced, and the MIST iterative algorithm is used to find the optimal isosurface threshold to realize the optimization of the structural material. Topology optimization design. [0003] The method descr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/18G06F30/23G06F2111/04G06F2113/24
Inventor 吴曼乔朱继宏张卫红杨开科何飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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