相关实验视频
Updated: Jun 12, 2025

11:41
Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
23.2K
在两个参数的扭曲地图中的同步分叉
Michele Mugnaine1, Bruno B Leal1, Iberê L Caldas1
1<a href="https://ror.org/036rp1748">Institute of Physics</a>, <a href="https://ror.org/036rp1748">University of São Paulo</a>, São Paulo, SP, Brazil.
Physical review. E
|September 19, 2024
概括
哈密尔顿系统中的同时岛屿随着扰动幅度的变化而变化. 岛链之间的过渡通过叉和结分叉发生,破坏总是通过叉分叉发生.
科学领域:
- 非线性动力学是一种非线性动力学.
- 混沌理论是一个混乱理论.
- 数学物理学的数学物理.
背景情况:
- 在扭曲哈密尔顿系统的相位空间中,由于多个共振扰动而产生同时岛屿.
- 卡雷-比尔科夫定理根据系统和扰动特征决定了岛屿的数量.
研究的目的:
- 为了分析两个参数标准地图 (两个和标准地图) 的岛屿链的修改,随着扰动幅度的增加.
- 为了确定与不同波相关的岛屿链之间的过渡路线.
主要方法:
- 对两个参数标准图的分析.
- 研究岛屿链的演变,随着扰动幅度的增加.
- 分叉路径的识别 (分叉和结).
主要成果:
- 确定了三条不同的路线,用于在和相关的岛屿链之间进行过渡.
- 在这些过渡过程中观察到中间的岛屿链配置.
- 岛屿的破坏始终是通过叉分叉发生的.
结论:
- 这项研究阐明了两参数标准地图中同时性岛屿的复杂动态.
- 分叉分析揭示了岛屿链进化和破坏的特定途径.
- 这些发现有助于理解扰乱的哈密尔顿系中的相位空间结构.
相关概念视频
Angle of Twist: Problem Solving
266
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
266
Angle of Twist - Elastic Range
278
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
278
Unsymmetric Bending
319
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
319
Unsymmetric Bending - Angle of Neutral Axis
283
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
283
Torsion of Noncircular Members
129
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...
129
Deformations in a Symmetric Member in Bending
163
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
163

