Design of Light Fireproof Enclosure Bulkheads Based on Topography Optimization for Cruise Ships

doi:10.16183/j.cnki.jsjtu.2020.201

Abstract

Abstract:

In order to develop a new lightweight enclosure structure with an excellent fireproof and bearing performance, and to replace the traditional stiffened fire enclosure bulkheads in the superstructure area, a design method of light fireproof enclosure bulkheads for cruise ship based on the topography optimization technology was proposed. The location and numbers of corrugated beads in lightweight wall designed by this method were generated according to the requirements of load bearing capacity and manufacturing process, and this method overcomes the disadvantages that the location and numbers of beads in the design of conventional corrugated wall have to be determined in advance. Aimed at the specified design regions, the lightweight of cruise fireproof enclosure bulkheads (CFEB) structure was taken as the objective function while the stress in the weld zone, the stress in the nonweld zone, and the first-order buckling factor of CFEB were taken as constraints. Then, the topography design models of CFEB were established and solved. Feasible configurations were obtained by topography optimization, and the final configurations of CFEB were formed by secondary design. The mechanical properties of the final configurations were compared with the traditional stiffened fireproof bulkheads. It is concluded that the new CFEB has advantages of lightweight and good strength compared with the traditional stiffened fireproof bulkheads.

Key words: topography optimization, secondary design, cruise fireproof enclosure bulkheads, lightweight design

CLC Number:

U662.2

ZHANG Fan, YANG Deqing, QIU Weiqiang. Design of Light Fireproof Enclosure Bulkheads Based on Topography Optimization for Cruise Ships[J]. Journal of Shanghai Jiao Tong University, 2021, 55(10): 1175-1187.

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材料	弹性模量/MPa	密度/(kg·m^-3)	泊松比	厚度/mm
钢制蒙皮	210000	7850	0.3	5
岩棉板	6.2	120	0.3	40

性能参数	数值
屈服强度/MPa	235
焊缝区许用应力放大因子	1.5
非焊缝区许用应力放大因子	1.7
安全系数	2
非焊缝区螺栓孔的应力集中系数	3

序号	工艺约束	收敛性	H/mm	S_K/MPa	S_W/MPa	F	M/kg
OPT1	30 mm非设计域	否	57.87	72.95	107.60	4.18	339.80
OPT2	30 mm非设计域+sys	否	37.42	71.68	141.20	4.36	335.80
OPT3	90 mm非设计域+sys	否	61.96	75.25	163.80	4.18	341.80
OPT4	180 mm非设计域	否	44.94	79.59	158.00	4.86	336.20
OPT5	180 mm非设计域+sys	否	57.71	68.11	117.70	5.91	341.40
OPT6	180 mm非设计域+sys+buffer	否	39.23	75.96	165.80	5.13	334.80

序号	工艺约束	收敛性	H/mm	S_K/MPa	S_W/MPa	F	M/kg
OPT1	180 mm非设计域+buffer	否	80.00	69.15	151.50	4.21	343.50
OPT2	180 mm非设计域+buffer +sys	是	69.57	67.00	176.00	3.72	336.50
OPT3	180 mm非设计域+repetition	是	45.63	67.23	122.10	7.05	336.60
OPT4	30 mm非设计域+repetition	是	45.40	67.00	150.50	3.01	332.40
OPT5	90 mm非设计域+repetition	是	48.07	67.00	174.60	3.22	332.30
OPT6	30 mm非设计域+repetition+sys	是	36.98	67.16	124.00	6.04	335.40
OPT7	90 mm非设计域+repetition+sys	是	39.40	67.00	134.70	7.30	335.40
OPT8	180 mm非设计域+repetition+sys	是	43.34	67.08	163.90	3.15	331.80

构型	上面板宽度/mm	下面板宽度/mm	腹板宽度/mm	腹板高度/mm	单个槽宽/mm	波纹角度/(°)
DS3	167.67	305.56,250.00,138.89	138.89	45.63	445.45	18.00
DS7	277.78	250.00,333.33,194.45	83.33	39.40	444.45	25.31
DS8	444.45	333.33	277.78	43.34	1000.00	8.87