基于磁流变阻尼器的球铁颗粒动态分析用于波形产生测试系统。

Dynamic Analysis of Sphere-Like Iron Particles Based Magnetorheological Damper for Waveform-Generating Test System.

机构信息

Division of Mechanical and Automotive Engineering, Kongju National University, Chungnam, 31080, Korea.

Agency for Defense Development, Daejeon 305-600, Korea.

出版信息

Int J Mol Sci. 2020 Feb 9;21(3):1149. doi: 10.3390/ijms21031149.

DOI:10.3390/ijms21031149

PMID:32050496

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7037517/

Abstract

In this study, a new double pulse waveform-generating test system with an integrated magnetorheological (MR) damper is proposed. Since the total shear stress of MR fluid can be varied according to the shape of particles, sphere-like iron particles-based MR fluid is filled into the MR damper. The test system consists of a velocity generator, three masses (impact, test, and dummy), a spring, and an MR damper. To tune the double pulse waveform profile, a damping force model is constructed to determine the fundamental parameters of the simulator. Then, the first and second shock waveform profiles are analyzed to solve the governing equation of motions representing the damping force and velocity. The mathematical model of the MR damper is formulated and applied to a simulator with a graphical user interface programmed using MATLAB. The effectiveness of the proposed simulator-featuring controllable MR damper is demonstrated by comparing the simulation and experimental results.

摘要

在这项研究中，提出了一种具有集成磁流变（MR）阻尼器的新型双脉冲波形生成测试系统。由于 MR 流体的总剪切应力可以根据颗粒的形状而变化，因此基于球形铁颗粒的 MR 流体被填充到 MR 阻尼器中。该测试系统由速度发生器、三个质量（冲击、测试和虚拟）、弹簧和 MR 阻尼器组成。为了调整双脉冲波形轮廓，构建了一个阻尼力模型来确定模拟器的基本参数。然后，分析了第一和第二冲击波形轮廓，以求解代表阻尼力和速度的运动方程。用 MATLAB 编写图形用户界面，对具有可控 MR 阻尼器的模拟器进行了数学建模并应用。通过比较模拟和实验结果，验证了所提出的具有可控 MR 阻尼器的模拟器的有效性。