A novel structural safety assessment method of large liquid tank based on the belief rule base and finite element method

2021 ◽  
pp. 1748006X2110216
Author(s):  
Yuan Chen ◽  
Zhijie Zhou ◽  
Lihao Yang ◽  
Guanyu Hu ◽  
Xiaoxia Han ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Safety Assessment ◽  
Expert Knowledge ◽  
Assessment Method ◽  
Assessment Model ◽  
Structural Safety ◽  
Rule Base ◽  
Belief Rule Base ◽  
Element Method

The structural safety assessment of large liquid tanks (LLT) has attracted an extensive attention. As a typical gray box model, the belief rule base (BRB) model can handle qualitative information and quantitative data simultaneously, which is a suitable modeling tool for structural safety assessment. However, it is difficult to establish and train the BRB model when there is a lack of expert experience and fault samples of LLT. Therefore, a novel safety assessment model for LLT based on BRB and finite element method (FEM-BRB) is proposed in this paper. The FEM is introduced to construct the BRB model by combining expert knowledge and industry standards for the first time, which can effectively compensate for the lack of expert experience. The fault samples are generated in the mechanism simulation model under different working conditions. Based on the fault samples generated by the FEM and historical samples, the projection covariance matrix adaption evolution strategy (P-CMA-ES) optimization algorithm is then used to train the model, which further improves the structural safety assessment accuracy when lacking fault samples. A case study of three actual oil tanks in a coastal port is conducted to illustrate the effectiveness and advantage of the developed structural safety assessment method.

A new risk assessment method based on belief rule base and fault tree analysis

2021 ◽  
pp. 1748006X2110114
Author(s):  
Hai-Long Zhu ◽  
Shan-Shan Liu ◽  
Yuan-Yuan Qu ◽  
Xiao-Xia Han ◽  
Wei He ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Expert Knowledge ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Evaluation Process ◽  
Assessment Method ◽  
Assessment Model ◽  
Rule Base ◽  
Tree Analysis ◽  
Belief Rule Base

Risk assessment methods are often used in complex industrial systems to avoid risks and reduce losses. The existing methods have not effectively solved the problems of lack of evaluation data and the interpretability of the entire evaluation process. This paper proposes a new risk assessment model based on the belief rule base (BRB) and Fault Tree Analysis (FTA). The FTA algorithm overcomes the difficulties of traditional BRB model in obtaining expert knowledge, clear indicators, and establishing logical relationships. This method establishes FTA rules based on the BRB model and expands the knowledge base through the FTA algorithm. A Bayesian network is applied as a conversion bridge between the FTA and BRB model. In addition, the model is optimized to reduce the uncertainty in the model. The method proposed is described by a case and its effectiveness is verified.

scholarly journals Reliability Assessment Model for Industrial Control System Based on Belief Rule Base

2019 ◽  
Vol 14 (3) ◽  
pp. 419-436 ◽  
Author(s):  
Yuhe Wang ◽  
Peili Qiao ◽  
Zhiyong Luo ◽  
Guanglu Sun ◽  
Guangze Wang
Keyword(s):  
Control System ◽  
Reliability Assessment ◽  
Quantitative Information ◽  
Assessment Method ◽  
Assessment Model ◽  
Rule Base ◽  
Industrial Control System ◽  
Industrial Control ◽  
Proposed Model ◽  
Belief Rule Base

This paper establishes a novel reliability assessment method for industrial control system (ICS). Firstly, the qualitative and quantitative information were integrated by evidential reasoning(ER) rule. Then, an ICS reliability assessment model was constructed based on belief rule base (BRB). In this way, both expert experience and historical data were fully utilized in the assessment. The model consists of two parts, a fault assessment model and a security assessment model. In addition, the initial parameters were optimized by covariance matrix adaptation evolution strategy (CMA-ES) algorithm, making the proposed model in line with the actual situation. Finally, the proposed model was compared with two other popular prediction methods through case study. The results show that the proposed method is reliable, efficient and accurate, laying a solid basis for reliability assessment of complex ICSs.

Study of Stability Assessment Method for Deep Surrounding Rock

2014 ◽  
Vol 638-640 ◽  
pp. 565-569
Author(s):  
Zhi Tong Mao ◽  
Yan Peng Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Stress ◽  
Assessment Method ◽  
Surrounding Rock ◽  
The Finite Element Method ◽  
Field Coupling ◽  
Rock Stability ◽  
Control Equation ◽  
Element Method

According to the three characteristics of deep surrounding rock: high stress, high temperature and high seepage, the three field coupling control equation of temperature-stress-seepage are established, the finite element method is used for solution. Considering stress transference of surrounding rock after creep and deformation, the finite element incremental equations is deduced. Combining the finite element method and strength reduction method, The defect of deep surrounding rock stability that never quantitatively assess before was overcome. The proposed calculation method is applied to project, the analysis results show that the proposed method is feasible.

Finite Element Analysis of Anchor Assembly in Cable Hydraulic Lift

2012 ◽  
Vol 251 ◽  
pp. 180-184
Author(s):  
Jian Qin ◽  
Yu Ying Zou ◽  
Qian Miao
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Assessment ◽  
Numerical Results ◽  
Hydraulic Lift ◽  
Element Analysis ◽  
Design Scheme ◽  
Mechanical Models ◽  
Element Method

The anchor assembly is the important part of the hydraulic lift, the stresses of which under load are analyzed using finite element method. The 3D mechanical models of anchor assembly are created with different sizes. Several important positions are investigated around the holes of upper anchor and these stresses are compared between different cases. Based upon the numerical results, the safety assessment of the anchor assembly is conducted and a reasonable design scheme is proposed.

scholarly journals A safety assessment method for a liquid launch rocket based on the belief rule base with environmental disturbance

2020 ◽  
Vol 50 (10) ◽  
pp. 1559
Author(s):  
Zhichao FENG ◽  
Changhua HU ◽  
Wei HE ◽  
You CAO ◽  
Guanyu HU ◽  
...  
Keyword(s):  
Safety Assessment ◽  
Assessment Method ◽  
Rule Base ◽  
Environmental Disturbance ◽  
Belief Rule Base

Strength Analysis of Chassis Structure for Medium-Sized Low-Floor Vehicle under Dynamic Load Cases

2010 ◽  
Vol 452-453 ◽  
pp. 709-712
Author(s):  
Yeon Su Kim ◽  
Kyeong Ho Moon ◽  
Se Ky Chang ◽  
Jai Kyun Mok
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Load ◽  
Structural Safety ◽  
Strength Analysis ◽  
Light Weight ◽  
Weight Structure ◽  
Backbone Structure ◽  
Hot Rolled ◽  
Element Method

For the medium-sized low-floor bus, backbone structure of chassis was designed to have light-weight structure with SAPH (Steel Automobile Press Hot rolled) 440. Strength for the designed backbone structure was also analyzed by finite element method under various dynamic load cases considered in this paper. On the basis of the analysis results, the structural safety for the designed backbone structure was evaluated and discussed in this paper.

A New Safety Assessment Method Based on Belief Rule Base With Attribute Reliability

2021 ◽  
Vol 8 (11) ◽  
pp. 1774-1785
Author(s):  
Zhichao Feng ◽  
Wei He ◽  
Zhijie Zhou ◽  
Xiaojun Ban ◽  
Changhua Hu ◽  
...  
Keyword(s):  
Safety Assessment ◽  
Assessment Method ◽  
Rule Base ◽  
Belief Rule Base

Structural Safety Evaluations of Bogie Frames for Rubber-Tired AGT Vehichles

2006 ◽  
Vol 321-323 ◽  
pp. 1491-1494
Author(s):  
Yeon Su Kim ◽  
Sung Hyuk Park ◽  
Rag Gyo Jeong ◽  
Tae Kon Lim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Experimental Results ◽  
Structural Safety ◽  
The Finite Element Method ◽  
Dynamic Stresses ◽  
Test Track ◽  
Element Method

This study was aimed at evaluating the structural safety of the new bogie frames for Korean-standardized rubber-tired AGT vehicles. The guidance frame and the rotation frame were designed according to Korean-standardized specifications for rubber-tired AGT vehicles, and their stresses were analyzed by using the finite element method. Based on the results of the analysis, dynamic stresses were measured while the train was running under various conditions in the test track. Analytical and experimental results verified the structural safety of the new bogie frames.

scholarly journals Numerical Prediction of Welding Distortion Considering Gravity Force on General Ship Grillage Structure by Elastic Finite Element Method Using Inherent Strain

2020 ◽  
Vol 8 (6) ◽  
pp. 454
Author(s):  
Donghan Woo ◽  
Mitsuru Kitamura
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Prediction ◽  
Gravity Force ◽  
Structural Safety ◽  
Interface Element ◽  
Welding Deformation ◽  
Welding Sequence ◽  
Inherent Strain ◽  
Element Method

The accurate numerical prediction of welding deformation is important to improve the structural safety of ships and offshore structures in heavy industries. The precise reflection of the real working condition in the numerical prediction is an essential factor to improve its result. In the present study, the effect of the gravity force on numerical prediction of the optimal welding sequence of a general ship grillage structure was validated with the introduction of a new boundary condition in which the structure is placed over rails. Additionally, the direction of the gravity force of welded structures could be changed at the final assembly process according to the production plan. The effect of the gravitational orientation on the final welding displacements was also investigated herein. The elastic finite element method using the inherent strain, interface element, and multipoint constraint function was introduced to analyze the welding deformation. This study validated the influence of the gravity force on the numerical prediction of welding displacements in a general ship grillage structure.

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