Yingfan Chen’s research while affiliated with Wuhan University of Technology and other places

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Publications (3)


Figure 4. Probability of the natural occurrence variation in navigational environment impact factors at different levels.
Figure 5. Variations in impact probabilities with navigational environment impact factor level.
Figure 6. Accident cases and full sample impact probability distribution.
Evaluation index system of navigational environment impact factors.
Research indicators.

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Research on Uncertainty Evolution of Ship Collision Status Based on Navigation Environment
  • Article
  • Full-text available

November 2022

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48 Reads

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4 Citations

Journal of Marine Science and Engineering

Liwen Huang

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Yingfan Chen

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Lei Wu

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[...]

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Shuzhe Chen

There is a need to study the evolutionary laws of the risks in the navigation environments of complex marine areas. This can promote shipping safety using an early-warning system. The present study determines shipping flows and meteorological conditions in a marine area on the basis of meteorological and automatic identification system (AIS) data. It also determines the uncertainty evolution law of the navigation environment’s influencing factors. Moreover, a navigation risk evolution system for ships in complex marine areas was developed. A case study was carried out in a coastal area of China on the basis of the determined evolutionary laws. Evolution in the navigational environment risk within the case study area was analyzed. The results showed that the hydrometeorology wind factor has the greatest impact on the risk of ship collisions. This work was not only able to show advances in navigational collision environmental evolution laws but also provides a theoretical reference for the evaluation and early warning of risks in shipping environments.

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A New Risk-Based Early-Warning Method for Ship Collision Avoidance

July 2021

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326 Reads

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3 Citations

IEEE Access

The ship collision accident (SCA) risk for any ship approaching any other change from the causation probability (CP) to the geometric probability (GP) in regime. Because ship operators may not be aware of the environmental factors (EFs) related potential risks in high CP during the initial stage of the GP analysis process, it is likely that higher-grade SCA measures will not be taken. However, if any EF-related CP is told to ship operators, they can take more effective and intentional measures in time; moreover, if the CP corresponding to navigation-related EFs is no less than the risk early warning critical value (REWCV) calculated based on historical SCA data, SCAs will be in a high-risk level. A new method was put forward here based on a quantitative analysis of EFs and previous SCA statistics to provide early warning of any SCA risk; and then a REWCV can be obtained based on quantified EFs by applying such method which is relatively simple but high operational and practical. A case study of Three Gorges Reservoir in China indicates that the range of EF values for which the probability of a SCA grows rapidly is consistent with environmental limits defined by Chinese maritime standards. Moreover, the modified critical value of the EF-related CP shall be further refined to act as the REWCV for CAs. In addition, the relationship (REWCV vs. the number of previous SCAs) was clarified.


A New Risk-based Early-warning Method for Ship Collision Avoidance

October 2019

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113 Reads

In the case that ship operators may not be aware of the potential risks of environmental factors in situation of high causation probability during the initial stage of the geometric probability analysis process, it is likely that higher-grade collision accident measures will not be taken. However, if any risks is told to the ship operators, more effective and intentional measures can be taken in time. Moreover, if the causation probability corresponding to environmental factors is no less than the risk early warning critical value calculated based on historical collision accident data, there would be a high-risk level that a collision may occur. A new method is put forward based on quantitative analysis of environmental factors and previous collision statistics to provide early warning of any accident risk, and a risk early-warning critical value (REWCV) can be obtained based on this simple but highly operational and practical method. A case study of Three Gorges Reservoir in China indicates that the range of environmental factors where the probability of collision accident grows rapidly is consistent with environmental limits defined by Chinese maritime standards. In addition, the relationship between the risk early-warning critical value and the number of previous collision accident is also clarified.

Citations (2)


... Thus, flange and shaft can be connected by using chamfers as shown in Fig. 1a. Due to the frequent changes of winds, waves and currents and other geographical environment and navigational status of ships during sailing [1], the main shaft could be subjected to cyclic torsional and bending loads, and the structural inhomogeneity could also lead to the occurrence of elastic stress concentration effects. This main shaft with one notch for research purpose can be shown in Fig. 1b, T is the torque, D is diameter of cross section of smooth part of the specimen, d is diameter of cross section of notch part, h is the radius difference of cross section between smooth part and notch part, and ρ is curvature radius of the u-notch. ...

Reference:

Effect of notch on fatigue performance of marine shaft made of 34CrNi3Mo alloy steel under torsional loading
Research on Uncertainty Evolution of Ship Collision Status Based on Navigation Environment

Journal of Marine Science and Engineering

... A dangerous navigation environment often causes more marine accidents. Among the most frequent marine accidents are ship collisions [10,11]; accordingly, they have attracted attention. Considering the uncertainty of the navigation environment in the evolutionary process, ship collision accidents were used as the research sample data. ...

A New Risk-Based Early-Warning Method for Ship Collision Avoidance

IEEE Access