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相关概念视频

Steel Fastening Techniques01:17

Steel Fastening Techniques

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Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
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Multiple Pipe Systems01:21

Multiple Pipe Systems

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Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
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Bending of Material: Problem Solving01:09

Bending of Material: Problem Solving

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In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
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Optimization Problems01:26

Optimization Problems

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Optimization problems often involve identifying maximum or minimum values under specific constraints. A well-known example is determining the longest horizontal pipe that can be moved around a right-angled corner, where a 3-meter-wide hallway meets a 2-meter-wide hallway. This scenario, common in architectural design and industrial transport, can be understood conceptually through geometric and trigonometric reasoning.To visualize the problem, consider the pipe as a straight line that touches...
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Structural Steel Products01:24

Structural Steel Products

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Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
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Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

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Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
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相关实验视频

Updated: Jan 18, 2026

Generating Lap Joints Via Friction Stir Spot Welding on DP780 Steel
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优化接序和改善接过程,用于海洋厚壁圆形管道.

Tao Ma1,2, Mingguan Fan3, Haipeng Miao4

  • 1College of Electrical and Information Engineering, Hunan University, Changsha 410082, China.

Materials (Basel, Switzerland)
|September 13, 2025
PubMed
概括

一个新的细分接序策略显著减少了用于造船的厚壁管道的接变形和应力. 跳过对称的方法是最佳的,提高了接质量和效率.

关键词:
多层多通接的多层接厚墙圆形管道接 厚墙圆形管道接接过程的改进 接过程的改进接顺序优化接顺序的优化接模拟 接模拟

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科学领域:

  • 接工程 接工程
  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程

背景情况:

  • 在造船业中,厚壁管道的自动接往往会出现显著的变形和质量下降.
  • 控制接引起的应力和扭曲对于结构完整性和性能至关重要.

研究的目的:

  • 提出一项优化细分多层多通序列的战略.
  • 通过减少厚壁管道的变形和残余应力来提高接质量.

主要方法:

  • 开发了一种接模型,并为厚壁管道建立了多层多通接轨迹方程.
  • 使用双圆形移动热源模型进行模拟.
  • 采用接有限元分析 (FEA) 来模拟和比较不同壁厚的管道工件上的四个细分接序.

主要成果:

  • 跳过对称的接序表明,对于厚壁圆形管道来说,性能优越.
  • 与其他序列相比,这种方法平均减少了6.50%的接变形和5.37%的接应力.
  • 针对不同管子厚度 (10,15,20毫米) 确定了优化的接参数,以实现最佳的接质量.

结论:

  • 提出的细分接序优化策略有效地减少了接变形和残余应力.
  • 跳过对称方法被推用于船舶制造业厚壁管道的自动接.
  • 优化的工艺参数提高接质量,确保结构完整性.