相关实验视频
Updated: Jun 20, 2025

06:54
Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
10.7K
基于多体动力学和有限元分析的挖掘机转盘的疲劳寿命预测程序系统
Chen Xian1,2, Han Zhang1,2, Young-Chul Kim2
1School of Mechanical Engineering, Shaanxi Institute of Technology, Xi'an, 710000, PR China.
Heliyon
|July 18, 2024
概括
这项研究使用集成的多体动力学,有限元素分析 (FEA) 和 MATLAB 预测挖掘机转盘机械疲劳. 该开源代码识别了应力度和易疲劳的区域,以改善设计和耐用性.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 可靠性工程可靠性工程
背景情况:
- 挖掘机转盘是易受疲劳故障的关键部件,在可变的运行负载下会出现疲劳故障.
- 像FEA和多轴疲劳标准这样的传统方法受到复杂而昂贵的负载频谱采集的限制.
- 预测重型机械部件中的机械疲劳对于运行安全和寿命至关重要.
研究的目的:
- 开发和验证用于预测挖掘机转盘机械疲劳的综合方法.
- 通过集成先进的建模技术,克服传统疲劳分析方法的局限性.
- 提供一个开源,可访问的工具,用于疲劳寿命预测和设计优化.
主要方法:
- 整合多体动力学建模和有限元分析 (FEA) 进行应力分布.
- 从现实数据中合成运行负载光谱.
- 韦布尔分布的应用用于负载大小的概率分析.
- 基于MATLAB的疲劳寿命预测框架的开发.
- 开发代码的开源,具有默认负载配置文件和预测模型.
主要成果:
- 在挖掘机旋转机内识别特定应力度区域.
- 确定易受疲劳失效的地区.
- 综合建模方法的验证,以准确预测疲劳寿命.
- 展示开源代码对实际工程应用的实用性.
结论:
- 综合方法为挖掘机转盘疲劳预测提供了强大而高效的方法.
- 开源代码促进了更广泛的采用,并有助于增强设计优化和耐用性.
- 准确的疲劳寿命预测对于提高重型机械的可靠性和延长使用寿命至关重要.
相关概念视频
Fatigue
180
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
180
Machines: Problem Solving II
304
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
304
Fatigue Strength of Concrete
183
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
183
Frames: Problem Solving II
225
Consider a hydraulic hoist supporting a load of 1 kN. Assuming a simplified schematic representation of this frame structure, the force acting on BD and BF members can be determined.
225
Design of Transmission Shafts - Stress Analysis
338
Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
338
Transmission Shafts: Problem Solving
221
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
221

