计算机建模 通过有限元分析对眼内部部件的体积动力学研究,在使用安全气囊冲击后使用有限元分析
Aya Ikeda1, Asami Shimokawa1, Kazuhiro Harada1
1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, Japan.
Clinical ophthalmology (Auckland, N.Z.)
|September 12, 2024
概括
气囊冲击会导致眼睛前腔和透镜的体积发生显著变化,恢复率各不相同. 这些发现提供了对安全气囊眼部损伤机制的见解.
科学领域:
- 眼科医生 眼科 眼科
- 生物力学 生物力学
- 计算建模计算建模
背景情况:
- 之前的研究利用有限元分析 (FEA) 研究眼睛对重创伤的反应.
- 这项研究专门研究了在安全气囊冲击期间眼睛内的体积动态.
研究的目的:
- 在使用FEA的安全气囊冲击期间评估眼内片段的体积动力学.
- 为了确定不同气囊部署速度的眼组织的体积变化率.
主要方法:
- 使用FEA程序PAM-GENERIS模拟了一个人眼模型.
- 在30至70米/秒的安全气囊部署速度下进行了模拟.
- 眼部片段的体积变化是根据网格集成计算的,并与基线值进行比较.
主要成果:
- 前腔体积显著下降,在更高的速度 (50-70 m/s) 上达到63-50%的最低值,随着急剧下降和逐渐恢复.
- 镜片体积显示出大幅下降,随后迅速恢复 (80-90%),除了超过基线的60米/秒外.
- 玻璃体体积的体积变化仍然很小,在99.2-100.4%的基线内.
结论:
- 观察到明显的,长时间的前腔体积减少和快速的透镜体积恢复 (组织之间有时间滞后).
- 这些发现为气囊引起的眼睛损伤的病理生理学提供了关键的见解.
- 改进后的FEA模型有助于了解伤害机制,并开发更安全的安全气囊系统.
关键词:
气囊安全气囊是如何使用的在前面的房间前面的房间.这是计算机模拟的计算机模拟.有限元分析是有限元分析.镜头 镜头 镜头 镜头 镜头眼睛的创伤是眼睛的创伤.玻璃体是一个玻璃体.在这个过程中,体积体积体积体积量.更多相关视频
07:30A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
Published on: September 21, 2017
8.9K
08:55Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments
Published on: April 24, 2020
3.0K
相关概念视频
Design Consideration
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
The factor of safety is another key aspect...
Impact Loading on a Cantilever Beam
The analysis of a cantilever beam with a circular cross-section subjected to impact loading at its free end illustrates the conversion of potential energy from a dropped object into kinetic energy, which is then absorbed by the beam as strain energy. This process is crucial for understanding how materials behave under dynamic loads, which is important in fields such as construction and aerospace.
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...
Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
Problem Solving: Volume
The volume of a fuel tank mounted on the wing of a jet aircraft can be modeled using the concept of solids of revolution. In this case, the tank is formed by rotating a two-dimensional region, defined by a mathematical function, about the x-axis. The region extends along the axis from zero to two meters, and the resulting three-dimensional shape is symmetric about the axis of rotation. Because the boundary curve lies directly against the axis, the disk method is an appropriate technique for...
