Structural shape-topology joint optimization method under design-related pressure loads
A joint optimization and pressure technology, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as poor practicability and achieve good practicability.
Active Publication Date: 2020-07-03
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In order to overcome the disadvantages of poor practicability of the existing structural topology optimization design method under the action of design-related pressure loads, the present invention provides a structural shape-topology joint optimization method under the action of design-related pressure loads
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] refer to Figure 1-3 . The present invention is illustrated by taking the shape-topological joint optimization design of the plane fixed beam under the action of snow load as an example. Under the snow load of 10Gpa, there is a non-design domain with a thickness of 0.1mm at the pressure boundary. Specific steps are as follows:
[0040] Step 1: Divide the design domain 3 into a square grid with a side length of 1 / 6mm.
[0041] Step 2: Using an implicit B-spline curve to describe the pressure boundary 1 of the structure, and calculating the level set function value of the pressure boundary 1 at the grid node (x, y). The B-spline curve describing the pressure boundary 1 consists of 12 control points P 1 ,P 2 ,...,P 12 Determined, the level set function of pressure boundary 1 is implicitly expressed by the following formula:
[0042]
[0043] In the formula, m s is the number of control points of the B-spline curve, y i is the i-th control point P i The y-coord...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a structural shape-topology combined optimization method under the action of a design related pressure load which is used for solving the technical problem of poor practicality of an existing structural topology optimization design method under the action of the design related pressure load. The invention adopts the technical scheme that an implicit B spline curve and a closed B spline curve are respectively adopted to describe a pressure boundary and a topology boundary of a structure, a non-design domain with a uniform thickness is defined at the pressure boundary, and evolution of the pressure boundary and the topology boundary is implemented by updating control parameters of the two types of spline curves so as to implement structural shape-topology combined optimization design under the action of the design related pressure load. According to the method, the pressure boundary and the topology boundary of the structure are associated with the B spline curves, control point information and positions of the B spline curves are defined as shape design variables of the optimization problem, an optimization result displays and comprises the control point and position information of the B spline curves, and the structural shape-topology combined optimization method can be integrated in a seamless mode with existing computer auxiliary design software, and is high in practicality.
Description
technical field [0001] The invention relates to a structural topology optimization design method under the action of design-related pressure loads, in particular to a structural shape-topology joint optimization method under the action of design-related pressure loads. Background technique [0002] The lightweight design of structures under pressure loads is a typical engineering problem, such as engine turbine discs and aircraft wings under aerodynamic pressure, submarine structures under water pressure, and building structures under wind or snow loads. Typical of this type of problem is that the location, direction, and magnitude of the pressure load change as the shape or topology of the structure changes. Simultaneously optimizing the pressure boundary of the structure and the topological layout of the structure is an effective means to further improve the mechanical properties of the structure. [0003] The document "Topology optimization with pressure load through a l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17
CPCG06F30/17G06F30/23
Inventor 张卫红周莹朱继宏徐钊杨开科
Owner NORTHWESTERN POLYTECHNICAL UNIV