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Optimal Design Method for Dynamic Response of Lattice Structure Oriented to Additive Manufacturing

A technology of dynamic response and lattice structure, applied in multi-objective optimization, design optimization/simulation, computer-aided design, etc., can solve problems such as dynamic optimization

Active Publication Date: 2022-05-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the deficiency that the existing optimal design method for lattice structure oriented to additive manufacturing cannot perform dynamic optimization, the present invention provides a dynamic response optimal design method for lattice structure oriented to additive manufacturing

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  • Optimal Design Method for Dynamic Response of Lattice Structure Oriented to Additive Manufacturing
  • Optimal Design Method for Dynamic Response of Lattice Structure Oriented to Additive Manufacturing
  • Optimal Design Method for Dynamic Response of Lattice Structure Oriented to Additive Manufacturing

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Embodiment Construction

[0039] Embodiments of the present invention are described in detail below, the embodiments are exemplary and intended to be used to explain the present invention, and cannot be construed as a limitation of the present invention.

[0040] In the present embodiment of a lattice structure dynamic response optimization design method for additive manufacturing, comprising the following steps:

[0041] Step 1: Establish the geometric model of different types of lattice single cell structures and their finite element models; according to the finite element models of each kind of lattice monocell structure, use the energy method theory to equate their mechanical properties and find the corresponding equivalent density ρ e , Young's modulus E e , shear modulus G e μ than Poisson e 。

[0042]In the present embodiment, the finite element model of BC, FCC, Octa, Octet single cell is established, the single cell size is 5mm, the porosity is 85%, the Young's modulus of the material E = 210GPa, ...

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Abstract

The present invention proposes a dynamic response optimization design method for lattice structures oriented to additive manufacturing. The method uses the energy method to calculate the equivalent mechanical properties of the unit cell structure, and selects a suitable unit cell configuration according to different loads; Multi-point constraints (MPC) connect concentrated mass to convert multi-point acceleration excitation into force excitation, and combine the modal displacement method to calculate the structural displacement response; finally consider the minimum manufacturing size constraint of the additive manufacturing process, and specify it in a lattice The minimum position displacement response is designed as the goal. Compared with the design method of the background technology, the method of the present invention is equivalent to the mechanical properties of the lattice unit cell structure, and considers the dynamic response characteristics of the lattice structure, and can realize the design of a given structural configuration lattice, So as to meet the needs of engineering applications.

Description

Technical field [0001] The present invention relates to a lattice structure dynamic response optimization design method, particularly to a dynamic response optimization design method for additive manufacturing lattice structures. Background [0002] In the fields of aerospace, automotive industry, there are a large number of rotating machinery, such as engines, propellers, machining machine tools, washing machines, etc., rotating machinery when rotating machinery works to produce periodic simple harmonic excitation often has a great impact on the normal work of the structure, so that the structure is destroyed, structural dynamic response is an important design requirement. The lattice structure has the characteristics of high porosity, specific strength and specific modulus, and has obvious effect on the rejection of vibration response, additive manufacturing solves the manufacturing process problem of large-scale lattice structure, so the dynamic performance design of the latti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F119/14G06F111/06G06F111/04G06F113/10
CPCG06F30/23Y02T10/40
Inventor 张卫红陈立朱继宏王骏谷小军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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