Topology optimization of core structure of titanium alloy sandwich cylindrical shell

Table 1. Limit values of characteristic stress
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Table 1. Limit values of characteristic stress
特征应力限界值
内壳中面周向应力/MPa 520
外壳中面周向应力/MPa 472
内壳内表面纵向应力/MPa 572
外壳内表面纵向应力/MPa 674
肋骨应力/MPa 400

Table 2. Selection of design variables in the first stage of optimization scheme
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Table 2. Selection of design variables in the first stage of optimization scheme
编号取值编号取值编号取值
1 0 11 0 21 0
2 1 12 0 22 1
3 0 13 0 23 0
4 0 14 0 24 0
5 0 15 1 25 0
6 0 16 0 26 0
7 0 17 0 27 0
8 0 18 0 28 0
9 1 19 0 29 1
10 0 20 0 30 0

Table 3. Selection of characteristic stresses and their limit values in the first stage of optimization scheme

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Table 3. Selection of characteristic stresses and their limit values in the first stage of optimization scheme

特征应力	取值	限界值	约束裕度/%
内壳中面周向应力/MPa	519.6	520	0.07
外壳中面周向力/MPa	469.2	472	0.59
内壳内表面纵向应力/MPa	363.1	572	36.50
外壳内表面纵向应力/MPa	202.0	674	70.00
肋骨应力/MPa	349.8	400	12.60

Table 4. Selection of characteristic stresses and their limit values in the second stage of optimization scheme

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Table 4. Selection of characteristic stresses and their limit values in the second stage of optimization scheme

特征应力	取值	限界值	约束裕度/%
内壳中面周向应力/MPa	686.1	728.0	5.76
外壳中面周向应力/MPa	595.5	660.8	9.88
肋板中部的Mises应力/MPa	582.3	583.3	0.17
肋板与内壳相连处的Mises应力/MPa	1 287.2	1 520.0	15.30
肋板与外壳相连处的Mises应力/MPa	1 354.6	1 520.0	10.90

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Haoyu ZHANG, Zhangxun HE, Yuansheng CHENG. Topology optimization of core structure of titanium alloy sandwich cylindrical shell[J]. Chinese Journal of Ship Research, 2023, 18(2): 121

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Paper Information

Category: Technology for Marine Composite Material Structure

Received: May. 21, 2021

Accepted: --

Published Online: Mar. 20, 2025

The Author Email:

DOI:10.19693/j.issn.1673-3185.02385

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Limit values of characteristic stress

Table 1. Limit values of characteristic stress

Table 2. Selection of design variables in the first stage of optimization scheme

Table 2. Selection of design variables in the first stage of optimization scheme

Table 3. Selection of characteristic stresses and their limit values in the first stage of optimization scheme

Table 3. Selection of characteristic stresses and their limit values in the first stage of optimization scheme

Table 4. Selection of characteristic stresses and their limit values in the second stage of optimization scheme

Table 4. Selection of characteristic stresses and their limit values in the second stage of optimization scheme