Study on Reliability⁃based Feature⁃integrated Design and Performance Analysis for Hollow Slab

doi:10.19491/j.issn.1001-9278.2021.02.009

Abstract

Abstract:

The reliability-based topology optimization based on a modified minimum weight with a displacement constraint model （RBTO-MMWDC） was established for the feature?integrated design of polymer products. In order to facilitate the popularization and application of this design method， a graphical user interface was developed on the basis of an optimization code， realizing the design of hollow slab section structure with a reliability index （β） of 3.0. The mechanical properties of the optimized structure were evaluated and analyzed through finite element simulation. Compared to the traditional structure， the compression resistance and bending resistance properties of the optimized structure were improved by 29.20 % and 74.93 %， respectively. The first?order natural frequency increased by 100.91 %， which effectively avoided the torsional modal shapes in the first five order modes. In addition， the C?UV9400 photopolymer for SLA was adopted as a raw material to prepare the specimens with two hollow slab structures using a stereolithography 3D printing technology. The optimized structure achieved an improvement in bending resistance strength and stiffness by 60.88 % and 55.30 %， respectively. This study provides a theoretical reference and feasible solution for the feature?integrated design of polymer products in the engineering application.

Key words: reliability-based design, feature?integration, hollow slab, additive manufacturing, mechanical property

CLC Number:

TQ320.1

YIN Fangfang, DANG Kaifang, YANG Weimin, DING Yumei, XIE Pengcheng. Study on Reliability⁃based Feature⁃integrated Design and Performance Analysis for Hollow Slab[J]. China Plastics, 2021, 35(2): 52-57.

Figures/Tables 12

References 15

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力学指标	总体位移/mm	Y轴方向位移/mm
结构1	2.26×10^-2	2.19×10^-2
结构2	1.60×10^-2	1.58×10^-2
变化值/%	-29.20	-27.85

力学指标	总体位移/mm	Y轴方向位移/mm
结构1	2.26×10^-2	2.19×10^-2
结构2	1.60×10^-2	1.58×10^-2
变化值/%	-29.20	-27.85

频率阶数	结构1的固有频率/Hz	结构2的固有频率/Hz
1	2 067.20	4 153.20
2	2 292.40	4 287.00
3	3 449.30	5 181.30
4	4 166.30	5 929.10
5	4 528.60	7 038.60

频率阶数	结构1的固有频率/Hz	结构2的固有频率/Hz
1	2 067.20	4 153.20
2	2 292.40	4 287.00
3	3 449.30	5 181.30
4	4 166.30	5 929.10
5	4 528.60	7 038.60

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