基于高静态低动态刚度技术的高维振动隔离系统的机械特性分析
Bu-Yun Li1,2, Chang-Geng Shuai1,2, Jian-Guo Ma3,4
1Institute of Noise & Vibration, Naval University of Engineering, Wuhan, 430030, People's Republic of China.
Scientific reports
|April 8, 2024
概括
使用高静态低动态刚度 (HSLDS) 技术的大型漂浮振动隔离系统 (FRVIS) 显示起动位移减少. 最佳性能是通过特定的安装高度和微弱的非线性来实现的,特别是对于海洋船舶.
科学领域:
- 机械工程 机械工程
- 海军建筑 海军建筑
- 材料科学 材料科学 材料科学
背景情况:
- 大型漂浮振动隔离系统 (FRVIS) 使用高静态低动态刚度 (HSLDS) 技术进行有效的低频振动隔离.
- 对于这些复杂的,高维的,合的非线性系统,现有的设计方法是不发达的,特别是对于受到滚动和倾斜的海洋船只.
- 海洋平台的振动隔离需要先进的解决方案来减轻运动引起的干扰.
研究的目的:
- 为FRVIS建立和分析一个六度自由度的HSLDS振动隔离模型.
- 在各种条件下调查这些系统的摆动稳定性和多维振动隔离性能.
- 澄清非线性对振动隔离器机械性能的影响.
主要方法:
- 开发一个六度自由度的HSLDS振动隔离模型,包括八个隔离器.
- 对每个隔离器的z方向非线性特征和x和y方向线性特征的分析.
- 基于非线性,隔离器安装高度 (Hz) 和中间隔离器相对位置 (Dr) 的系统性能评估.
主要成果:
- 弱非线性显著降低了摆动位移反应,显示出HSLDS的特征.
- 安装高度Hz=0在强烈的非线性下产生最佳的振动隔离,防止二次峰值并最大限度地提高高频隔离.
- 当Hz不是零时,弱非线性比强非线性更好;Dr对隔离效率的影响最小.
结论:
- 开发的HSLDS模型准确地预测了FRVIS在海洋应用中的性能.
- 仔细考虑非线性和安装参数 (Hz) 对于优化振动隔离至关重要.
- 建议使用同等距离的安装 (Dr=0.5) 以确保安装的稳定性,尽管它对振动隔离的影响有限.
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