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工程设计学报  2026, Vol. 33 Issue (1): 17-32    DOI: 10.3785/j.issn.1006-754X.2026.05.188
机械设计理论与方法     
基于FFT-BN模型的桥式起重机危险等级评估方法及系统
董青1(),李俊齐1,徐格宁1,牛曙光2,赵科渊1
1.太原科技大学 机械工程学院,山西 太原 030024
2.太原重型机械集团有限公司,山西 太原 030024
Hazard level assessment method and system for bridge crane based on FFT-BN model
Qing DONG1(),Junqi LI1,Gening XU1,Shuguang NIU2,Keyuan ZHAO1
1.School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2.Taiyuan Heavy Machinery Group Co. , Ltd. , Taiyuan 030024, China
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摘要:

为了在设计源头对起重机所面临的危险实施有效防控,需着力解决现役桥式起重机存在的危险源辨识不全面、量化评估体系缺失及风险评估模型局限性等核心问题。为此,提出了基于FFT-BN(fuzzy fault tree-Bayesian network,模糊故障树-贝叶斯网络)模型的桥式起重机危险等级评估方法,并开发了专用型系统平台。聚焦桥式起重机的结构与零部件,通过系统性失效分析建立精细化的危险源辨识流程,以实现潜在风险的全覆盖;构建专家评价量化体系,设计标准的定量指标,并对危险源进行量化表征;提出基于FFT-BN的危险等级评估模型,结合FFT的失效逻辑分析能力与BN的不确定性推理优势,在提升模型精度与效率的同时实现复杂风险的动态量化评估与等级划分;开发专用型桥式起重机危险等级评估系统平台,实现了评估流程的智能化革新,大幅提升工程实际的应用效率。以在役QD40 t-22.5 m-9 m通用桥式起重机为例,验证了所提出方法的工程可行性与场景适用性,为设备本质安全提升与事故主动预防提供了有效的解决方案和工具支持。

关键词: 危险源辨识危险源量化模糊故障树-贝叶斯网络桥式起重机危险等级    
Abstract:

To implement effective prevention and control of hazards faced by cranes at the source of design, it is necessary to address core issues existing in active bridge cranes, such as incomplete hazard source identification, lack of quantitative assessment systems, and limitations of risk assessment models. Therefore, a hazard level assessment method for bridge cranes based on FFT-BN (fuzzy fault tree-Bayesian network) model is proposed, and a dedicated system platform is developed. Focusing on the structure and components of bridge cranes, a refined hazard source identification process was established through systematic failure analysis to achieve comprehensive coverage of potential risks. An expert evaluation quantitative system was constructed, standard quantitative indicators were designed, and hazard sources were quantitatively characterized. A hazard level assessment model based on FFT-BN was proposed, which combined the failure logic analysis capability of FFT with the uncertainty reasoning advantage of BN, to achieve dynamic quantitative assessment and level classification of complex risks while improving the model accuracy and efficiency. A dedicated hazard level assessment system platform for bridge cranes was developed, realizing the intelligent innovation of the assessment process and significantly improving the application efficiency in engineering practice. Taking the in-service QD40 t-22.5 m-9 m general bridge crane as an example, the engineering feasibility and scenario applicability of the proposed method were verified, providing effective solutions and tool support for the improvement of equipment intrinsic safety and active prevention of accidents.

Key words: hazard source identification    hazard source quantification    fuzzy fault tree-Bayesian network (FFT-BN)    bridge crane    hazard level
收稿日期: 2025-08-15 出版日期: 2026-03-01
CLC:  TH 215  
基金资助: 国家自然科学基金资助项目(52105269)
作者简介: 董 青(1989—),女,教授,硕士生导师,博士,从事重大装备数字孪生、疲劳寿命预测、安全评估、报废决策及相关专业软件开发等研究,E-mail: qingdong@tyust.edu.cn,https://orcid.org/0009-0004-7653-1673
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引用本文:

董青,李俊齐,徐格宁,牛曙光,赵科渊. 基于FFT-BN模型的桥式起重机危险等级评估方法及系统[J]. 工程设计学报, 2026, 33(1): 17-32.

Qing DONG,Junqi LI,Gening XU,Shuguang NIU,Keyuan ZHAO. Hazard level assessment method and system for bridge crane based on FFT-BN model[J]. Chinese Journal of Engineering Design, 2026, 33(1): 17-32.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2026.05.188        https://www.zjujournals.com/gcsjxb/CN/Y2026/V33/I1/17

图1  起重机械事故统计
图2  危险源辨识方法
评估策略危险源辨识范围量化方法危险等级评估逻辑设计源头预防标准体系兼容性
国内策略(GB)不全面定性为主,精度低逻辑简单,系统性差较弱,事后整改为主不统一
国际策略(ISO)不全面定性为主,精度低逻辑简单较弱,事后整改为主不统一
欧盟策略(EN)全面定量为主,精度较高逻辑清晰,灵活性差较强,依赖人工判断体系完整
本文方法全面定量为主,精度高逻辑严谨,多层级推理强,支持设计端预防兼容性强
表1  起重机危险评估策略对比
图3  桥式起重机结构组成
组成结构/机构零部件危险源1危险源2危险源3

金属

结构

A1

桥架结构

B1

主梁C1主体结构失稳D1裂纹/断裂D2弹性变形大/永久塑性变形D3
端梁C2主体结构异常振动、晃动D4裂纹/断裂D5结构腐蚀、局部出现穿孔D6
连接梁C3焊缝存在裂纹/气孔/固体夹杂/未熔合/未焊透等缺陷D7结构腐蚀、局部出现穿孔D8金属结构连接螺栓/销轴等小部件断裂/脱落D9
小车架B2结构变形/扭曲D46焊缝/连接点开裂D47腐蚀D48

运行机构

A2

大车运行机构B3大车减速电机C4制动器失效D10齿轮/轴承磨损/断齿D11电机过热/烧毁D12
大车联轴器C5连接螺栓松动/断裂D13弹性元件老化/损坏D14对中不良导致磨损D15
大车车轮组C6车轮裂纹等表面缺陷D16轮缘磨损/塑性变形D17车轮踏面磨损/塑性变形D18
小车运行机构B4小车减速电机C7制动器失效D19齿轮/轴承磨损/断齿D20电机过热或烧毁D21
小车联轴器C8连接螺栓松动/断裂D22弹性元件老化/损坏D23对中不良导致磨损D24
小车车轮组C9车轮裂纹等表面缺陷D25轮缘磨损/塑性变形D26车轮踏面磨损和塑性变形D27

起升机构

B5

钢丝绳C10钢丝绳断丝/断股/断绳D28腐蚀/变形D29钢丝绳的连接/固定不可靠D30
滑轮组C11无防脱槽装置/装置损坏D31滑轮与侧板/顶板间隙过大D32滑轮裂纹等表面缺陷D33
吊钩组C12定位板松动、脱落D34吊钩表面裂纹D35吊钩磨损、腐蚀D36

安全装置

A3

行程限位装置C13超过预定位置有可能发生危险时,相应限位装置缺失D37行程开关布置不合理导致限位功能缺失/失效D38传感器失效导致限位失效D39
防超速装置C14限速装置缺失或损坏D40传感器失效导致限速失效D41系统故障导致限速失效D42
防超载装置C15限载装置缺失或损坏D43传感器失效导致限载失效D44系统故障导致限载失效D45
表2  桥式起重机各类危险源
资质等级基础资质经验维度评估能力权重分配
资深专家起重机安全/检验领域工作年限10年;起重机检验师/注册安全工程师;机械/安全工程博士桥式起重机设计/制造/检验/事故调查项目数量3个;以往风险评估结论与实际事故的差异度15%每年参与行业技术研讨会3次;与结构力学、电气自动化等专业协作经历2次1.2
合格专家起重机安全/检验领域工作年限5~10年;起重机检验员证书;机械/安全工程硕士桥式起重机设计/制造/检验/事故调查项目数量2个;以往风险评估结论与实际事故的差异度30%每年参加专业技术培训2次;与结构力学、电气自动化等专业协作经历1次1.0
实习专家起重机安全/检验领域工作年限<5年;起重机操作/维修资格证书;相关专业本科及以上协助桥式起重机设计/制造/检验/事故调查项目数量1个;在导师指导下完成模拟评估完成岗前培训课程0.8
表3  专家分级准入条件与权重分配
维度依据评分准则(1~5分)权重
1分2分3分4分5分
历史发生频率年事故/故障次数2次3~4次4~5次6~8次9次30%↑↓
设备老化与缺陷年检验不合格项0项1~2项3~4项5~6项7项20%↑↓
人为操作风险工作人员年违章次数1次2~3次4~5次6~8次9次20%↑↓
控制措施可靠性安全装置年失效次数1次2~3次4~5次6~8次9次20%↑↓
环境诱发因素高温/腐蚀/大风年暴露天数30天30~90天90~150天150~200天200天10%↑↓
表4  危险源多维度加权评分准则
专家术语评级三角模糊数/10-3
低(S<1)(0, 1, 2)
较低(1S<2)(2, 3, 4)
中等(2S<3)(4, 5, 6)
较高(3S<4)(6, 7, 8)
高(S4)(8, 9, 10)
表5  专家术语评级规则
图4  梯形隶属函数
图5  桥式起重机的T-S模糊故障树模型
图6  T-S模糊故障树转BN模型的流程
图7  FFT-BN模型
指标等级区间
极低(V低(L中等(M高(H极高(K
后验概率[0, 0.006)[0.006, 0.015)[0.015, 0.021)[0.021, 0.028)[0.028, 1.000]
关键重要度[0, 0.003)[0.003, 0.011)[0.011, 0.014)[0.014, 0.016)[0.016, 1.000]
表6  后验概率和关键重要度等级划分
关键重要度后验概率
VLMHK
VR1R1R2R3R4
LR1R2R2R3R4
MR2R2R3R4R5
HR3R3R4R4R5
KR4R4R5R5R5
表7  危险等级划分
图8  桥式起重机危险等级评估系统平台开发流程
软件名称功能作用版本影响因素关键匹配关系版本号
VS-code开发Python通信协议、前端界面,支持串口通信调试插件兼容性(Python、JS相关插件),多语言开发体验,支持调试功能无强制版本依赖,支持JS/HTML/Python的语法高亮与调试工具v1.98
Python编写TCP/IP、Socket通信协议,连接MySQL、MATLAB及前端系统界面PyMySQL、Pyserial等数据库的兼容性,数据处理性能与MATLAB版本相匹配匹配MATLAB R2022a+的MATLAB Engine,支持MySQL 8.0的加密方式3.10
MySQL存储原始数据、业务数据、决策数据等,支持多端数据读写加密方式兼容性,数据类型(浮点数、Json文件)兼容性被Python、MATLAB及JS脚本(MySQL2库)访问8.0.34
MATLAB构建FFT-BN模型,开展危险等级评估及划分,并回传结果至数据库支持Fatigue Toolbox、Database Toolbox等工具箱;支持与Python/MySQL的交互计算通过MATLAB Engine兼容Python 3.8—3.10,且支持MySQL 8.0的数据读写R2022a
表8  相关应用软件程序及版本
图9  桥式起重机危险等级评估系统平台主界面
图10  危险源辨识及量化结果
根节点模糊失效概率/10-3根节点模糊失效概率/10-3根节点模糊失效概率/10-3根节点模糊失效概率/10-3根节点模糊失效概率/10-3根节点模糊失效概率/10-3
D1(4, 5, 6)D9(6, 7, 8)D17(6, 7, 8)D25(6, 7, 8)D33(4, 5, 6)D41(4, 5, 6)
D2(6, 7, 8)D10(6, 7, 8)D18(6, 7, 8)D26(4, 5, 6)D34(8, 9, 10)D42(6, 7, 8)
D3(4, 5, 6)D11(8, 9, 10)D19(8, 9, 10)D27(8, 9, 10)D35(6, 7, 8)D43(4, 5, 6)
D4(6, 7, 8)D12(6, 7, 8)D20(8, 9, 10)D28(8, 9, 10)D36(6, 7, 8)D44(2, 3, 4)
D5(6, 7, 8)D13(4, 5, 6)D21(2, 3, 4)D29(6, 7, 8)D37(8, 9, 10)D45(6, 7, 8)
D6(6, 7, 8)D14(6, 7, 8)D22(4, 5, 6)D30(6, 7, 8)D38(8, 9, 10)D46(4, 5, 6)
D7(6, 7, 8)D15(6, 7, 8)D23(6, 7, 8)D31(6, 7, 8)D39(4, 5, 6)D47(6, 7, 8)
D8(6, 7, 8)D16(4, 5, 6)D24(4, 5, 6)D32(4, 5, 6)D40(6, 7, 8)D48(6, 7, 8)
表9  根节点的模糊失效概率
序号D1D2D3C1
00.51.0
10001.00.00.0
2000.50.10.60.3
30010.00.01.0
400.500.30.70.0
500.50.50.00.40.6
600.510.00.01.0
70100.00.20.8
8010.50.00.10.9
90110.00.01.0
26110.50.00.01.0
271110.00.01.0
表10  T-S模糊门9
中间节点失效程度中间节点失效程度中间节点失效程度
0.51.00.51.00.51.0
C10.0110.018C90.0140.025B20.0130.026
C20.0090.015C100.0140.024B30.0240.075
C30.0120.020C110.0120.021B40.0230.070
C40.0150.027C120.0150.027B50.0240.076
C50.0120.020C130.0090.017A10.0850.018
C60.0140.025C140.0110.018A20.0380.211
C70.0130.022C150.0100.016A30.0180.054
C80.0120.020B10.0190.055
表11  中间节点的失效概率
图11  桥式起重机危险等级评估结果
危险等级危险源
R1D1、D3、D6、D46、D47、D48
R2D2、D4、D5、D7、D8、D9、D15、D21、D24、D30、D32、D37、D38、D40、D42、D43、D45
R3D13、D14、D20、D22、D23、D41
R4D12、D17、D18、D26、D27、D31、D33、D34、D39、D44
R5D10、D11、D16、D19、D25、D28、D29、D35、D36
表12  桥式起重机危险等级划分
图12  信息数据管理界面
评估模型不确定性建模灵活性推理能力计算效率适用规模可解释性
FFT中等较低较弱较低
BN较高较高中等较低
FFT-BN较高
表13  桥式起重机危险等级评估方法性能对比
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