Abstract

The lightweight of liquefied natural gas (LNG) tanker can reduce transportation cost and improve transportation efficiency. However, in lightweight design, the random vibration analysis based on fluid–structure interaction (FSI) is difficult, which demands to be effectively solved by simplifying the finite element model and load. The vibration test and fluid–structure interaction modal numerical analysis of a tanker model were carried out, respectively, and the results are in good agreement. Taking the DC18 LNG tanker as an example, the random vibration response analysis was carried out based on the fluid–structure interaction modal numerical analysis, and the random fatigue damage coefficient of the support region of the inner container was obtained, which was used as the benchmark for the model and load simplification. The finite element model of the LNG tanker was simplified by applying the equivalent liquid mass to the walls of the inner container in the form of density. It is found that when the equivalent liquid mass ratio is 40%, the random vibration response characteristics of the DC18 LNG tanker are close to the actual structure. In the static calculation of the simplified model, the stress response of the container support area is close to the actual structural when the equivalent road spectrum load is 0.95 g vertical acceleration. In this case, the stress result and the overall damage coefficient equivalent to the actual structure can be obtained just by static calculation, which greatly simplifies the solution process.

References

1.
Wan
,
F.
, and
Xie
,
D.
,
2015
, “
Application Scope and Economical Comparison of Natural Gas Transportation
,”
Oil Gas Storage Transp.
,
34
(
7
), pp.
709
713
.
2.
Fan
,
Z.
,
Gui
,
L.
, and
Su
,
R.
,
2014
, “
Research and Development of Automotive Lightweight Technology
,”
J. Automot. Saf. Energy Saving
,
5
(
1
), pp.
1
16
.10.3969/j.issn.1674-8484.2014.01.001
3.
Ding
,
J.
,
Zhang
,
P.
, and
Wang
,
P.
,
2016
, “
Analysis of Vibration Test Standard and Field Measurement Data for Rolling Stock Equipment
,”
J. Mech. Eng.
,
52
(
22
), pp.
129
137
.10.3901/JME.2016.22.129
4.
Guan
,
P.
, and
Xiao
,
S.
,
2012
, “
Random Vibration Fatigue Simulation of Vehicle Contamination Box Based on Information in Frequency Domain
,”
Machinery
,
39
(
11
), pp.
20
23
.
5.
Xin
,
T.
,
2012
, “
Strength Analysis and Fatigue Research of Lightweight LNG Tank Truck
,” Master's thesis,
Nanjing University of Science and Technology
,
Nanjing, CN
.
6.
Vera
,
C.
,
Paulin
,
J.
,
Suárez
,
B.
, and
Gutiérrez
,
M.
,
2005
, “
Simulation of Freight Trains Equipped With Partially Filled Tank Containers and Related Resonance Phenomenon
,”
Proc. Inst. Mech. Eng., Part F
,
219
(
4
), pp.
245
259
.10.1243/095440905X8916
7.
Chen
,
G.
, and
Yang
,
X.
,
2011
, “
FSl Vibration Analysis of Ultra-Large Liquid Storage Tank
,”
J. Tangshan Univ.
,
24
(
03
), pp.
5
8
.
8.
Zhang
,
J.
,
Zhang
,
Q.
,
Zhou
,
H.
, and
Wang
,
K.
,
2015
, “
Experimental Study on Fluid-Structure Coupled Longitudinal Impact Vibration Characteristics of Railway Tank Car
,”
J. Vib. Shock
,
34
(
15
), pp.
205
209
.
9.
Shi
,
W.
,
Wang
,
L.
, and
Wang
,
X.
,
2015
, “
Simulation and Analysis of Random Vibration of New Adiabatic Support Structure for Cryogenic Tank
,”
Vac. Cryog.
,
21
(
3
), pp.
181
185
.
10.
Liu
,
X.
, and
Tang
,
L.
,
2005
, “
Study on Main Components of Aluminum Alloy Can
,”
Chem. Teaching
, (
5
), p.
10
.
11.
Tang
,
Y.
,
1994
, “
Rocking Response of Tanks Containing Two Liquids
,”
Nucl. Eng. Des.
,
152
(
1–3
), pp.
103
115
.10.1016/0029-5493(94)90077-9
12.
Jaiswal
,
O. R.
, and
Jain
,
S. K.
,
2005
, “
Modified Proposed Provisions for Aseismic Design of Liquid Storage Tanks
,”
J. Struct. Eng.
,
32
(
3
), pp.
195
206
.
13.
Standardization Administration of the P. R. China
,
2011
, “
GB 150.2-2011 Pressure vessels - Part 2: Materials
,” China Quality Inspection Press, Beijing, China.
14.
Chen
,
Y.
,
2018
, “
Topology Optimization and Finite Element Analysis on Aluminum Tank Semi-trailer
,” Master's thesis,
Shandong University of Technology
,
Zibo, CN
.
15.
Li
,
Y.
,
Mulani
,
Sameer B.
,
Kapania
,
Rakesh K.
,
Fei
,
Q.
, and
Wu
,
S.
,
2017
, “
Non-Stationary Random Vibration Analysis of Structures Under Multiple Correlated Normal Random Excitations
,”
J. Sound Vib.
,
400
, pp.
481
507
.10.1016/j.jsv.2017.04.006
16.
Cao
,
Q.
,
2007
, “
Random Vibration and Fatigue Strength Analysis of Bus Skeleton for Army
,” Master's thesis,
Shanghai Jiao Tong University
,
Shanghai, CN
.
17.
Ma
,
R.
,
2010
, “
Fatigue Analysis of Bus Skeletion and the Secondary Development
,” Master's thesis,
Northeastern University
,
Shenyang, CN
.
18.
Pan
,
H.
,
2016
, “
Study on Gearbox Fatigue Life Analysis by Steinberg Method
,” Master's thesis,
Southwest Jiaotong University
,
Chengdu, CN
.
19.
Wu
,
Y.
,
Xu
,
H.
,
Lu
,
Q.
,
Zheng
,
J.
, and
Xu
,
P.
,
2018
, “
Low-Cycled Fatigue Life of S30408 Stainless Steel at Liquid-Nitrogen Temperature
,”
ASME
Paper No. PVP2018-84498. 10.1115/PVP2018-84498
20.
Zhao
,
L.
,
Cheng
,
K.
,
Yan
,
W.
, and
Du
,
T.
,
2003
, “
The Finite Element Analysis for Its Intensity and Toughness About Tank of Liquid Tank Semitrailer
,”
Spec. Purpose Veh.
,
2003
(
4
), pp.
9
11
.
21.
Liu
,
W.
,
Lam
,
D.
, and
Belytschko
,
T.
,
1984
, “
Finite Element Method for Hydrodynamic Mass With Nonstationary Fluid
,”
Comput. Methods Appl. Mech. Eng.
,
44
, pp.
177
211
.10.1016/0045-7825(84)90142-7
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