| 摘要: |
| 目的 为在运输系统同时实现对不同载荷的高性能隔振，采用多组凸轮和弹簧-滚轮负刚度结构，提出一种适用于不同载荷的新型高性能准零刚度运输隔振系统。方法 首先，采用多组凸轮和弹簧-滚轮负刚度机构与正刚度弹簧并联的方式设计可适应于多种不同负载的准零刚度运输隔振系统;其次，分析该系统的静力学特性，推导出其刚度特性;最后，基于谐波平衡法、系统运动微分方程及相图，研究该隔振系统在不同水平弹簧预压缩量、不同激励幅值条件下的动态隔振特性。结果 通过设计适当的系统结构参数，该隔振系统将在多个不同平衡点附近分别表现出准零刚度特性，进而获得优异的宽频隔振效果。结论 该新型准零刚度运输隔振系统可以在不同载荷条件下同时具有准零刚度特性，增加水平弹簧预压缩量至接近满足准零刚度条件下的压缩量、减小激励幅值，均可改善系统的隔振性能。相比轻载情形，重载的准零刚度运输隔振系统的起始隔振频率更低，且频率跳跃现象出现的频段范围更小。 |
| 关键词: 不同载荷 准零刚度 运输隔振系统 谐波平衡法 |
| DOI：10.19554/j.cnki.1001-3563.2025.05.028 |
| 分类号: |
| 基金项目:中国物流学会研究课题 (2021CSLKT3-158) |
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| Design of Quasi-zero-stiffness Transportation Isolation System Considering Different Loads |
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TIE Shicui1, WANG Hualan2
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(1. Qinghai Vocational and Technical University, Xining 810000, China;2. Lanzhou Jiaotong University, Lanzhou 730070, China)
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| Abstract: |
| To achieve high-performance vibration isolation for different loads simultaneously in the transportation system, the work aims to propose a novel high-performance quasi-zero-stiffness transportation vibration isolation system suitable for various loads by using multiple sets of negative stiffness structures of cams and spring-rollers. Firstly, a quasi-zero-stiffness transportation vibration isolation system adaptable to multiple different loads was designed by using the parallel connection of multiple sets of cams and spring-rollers of negative stiffness mechanisms and positive stiffness springs. Secondly, the static characteristics of the system were analyzed, and its stiffness characteristics were derived. Finally, based on the harmonic balance method and the motion differential equation and phase diagram of the system, the dynamic vibration isolation characteristics of the vibration isolation system under different horizontal spring pre-compression amounts and different excitation amplitudes were studied. By designing appropriate structural parameters of the system, the vibration isolation system would exhibit quasi-zero-stiffness characteristics near multiple different equilibrium points, thereby achieving excellent broadband vibration isolation effects. The new quasi-zero-stiffness transportation vibration isolation system can simultaneously possess quasi-zero-stiffness characteristics under different load conditions. Increasing the horizontal spring pre-compression amount to approach the compression amount that satisfies the quasi-zero-stiffness condition and reducing the excitation amplitude can both improve the vibration isolation performance of the system. Compared with the light load situation, the initial vibration isolation frequency of the quasi-zero-stiffness transportation vibration isolation system under heavy load is lower, and the frequency band range where the frequency jump phenomenon occurs is smaller. |
| Key words: different loads quasi-zero-stiffness transportation isolation system harmonic balance method |
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