组合三明治面板的动态特征与随机振动下的三角化拉 (Tri-Chi) 蜂
Hui Yuan1,2, Yifeng Zhong1,2, Yuxin Tang1,2
1School of Civil Engineering, Chongqing University, Chongqing 400045, China.
Materials (Basel, Switzerland)
|August 29, 2024
概括
一个新的模型准确地预测了三角形形蜂核心的复合三明治面板的随机振动. 关键的设计因素包括核心带-肋骨角度和面板布局,以优化性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 结构动力学 结构动力学
背景情况:
- 复合材料三明治板 (CSP) 具有三角形 (Tri-Chi) 蜂芯,具有独特的Poisson比率 (PR) 和刚性特性.
- 了解这些结构的随机振动行为对于它们在苛刻环境中的应用至关重要.
研究的目的:
- 开发和验证一种精确的模型,用于评估带有Tri-Chi蜂核心 (CSP-TCH) 的复合三明治板的随机振动特性.
- 确定影响CSP-TCH振动响应的关键结构参数.
主要方法:
- 通过变异异对称方法制定了一个二维相当的Reissner-Mindlin模型 (2D-ERM).
- 数字模拟,包括3D有限元素分析 (FEA),功率光谱密度 (PSD) 曲线和根平均平方 (RMS) 响应,用于验证.
- 进行了模式分析,以评估自然频率和模式可靠性.
主要成果:
- 与3D FEA相比,2D-ERM显示了高精度,自然频率的相对误差低于7%,PSD和RMS值低于5%,相比3D FEA.
- 核心的带-肋骨角度和复合面板的布置模式被确定为影响振动的关键因素.
- 核心层的波桑比率显著影响振动特性,从负值转变为正值.
结论:
- 开发的2D-ERM提供了一个快速而准确的方法来分析CSP-TCH的随机振动.
- 优化带-肋骨角度和面板布局对于定制这些复合结构的振动性能至关重要.
相关概念视频
Method of Sections: Problem Solving I
539
Consider a symmetrical roof truss structure, composed of vertical, diagonal, and horizontal members. The length of each horizontal member is 4 m. The lengths of the vertical members FB and HD are 4 m, while the length of member GC is 6 m. The loads acting at joints F, G, and H are 2 kN, while those at joints A and E are 1 kN.
539
Torsion of Noncircular Members
130
Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
130
Bending of Members Made of Several Materials
145
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
145
Unsymmetric Loading of Thin-Walled Members
101
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
The concept of the shear center is crucial in countering the...
101
Moments of Inertia for Composite Areas
997
Composite areas are structures with multiple basic shapes connected in some way. These shapes usually include rectangles, triangles, circles, and other basic shapes that are connected in such a way as to form a single structure. Calculating the second moment of area for a composite area is essential when trying to understand the structure's overall stiffness.
The second moment of area, also known as the moment of inertia, measures a structure's resistance to bending. It is calculated by...
The second moment of area, also known as the moment of inertia, measures a structure's resistance to bending. It is calculated by...
997
Residual Stresses in Circular Shafts
165
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
165


