BVB3661香蕉筛仿真计算与试验测试模态对比分析

Comparative analysis of simulation calculation and experimental testing modal of BVB3661 banana screen

模态振型是振动筛动态分析的重要参数,为了探讨BVB3661香蕉筛的结构动态特性,通过采用与实际工况相似的原则,建立实体模型并进行仿真计算模态分析,通过合理的数据采集方法进行试验模态测试,研究结果表明:试验模态分析的固有频率与仿真计算结果的最大误差范围在8%以内,且对应的固有振型基本一致;仿真计算与试验测试模态与筛机工作频率14.17Hz相差较远,距离相差值均在10%以上,避免了共振现象的发生。改造后BVB3661香蕉筛技术性能指标比原来筛机有了较大提高,筛机运转更加平稳,使用效果和可靠性方面得到了显著提高。

Modal vibration mode is an important parameter for dynamic analysis of vibrating screens.In order to explore the structural dynamic characteristics of BVB3661 banana screen,a solid model was established to conduct simulation modal analysis under the principle of similarity to actual working conditions.Through reasonable data collection methods,experimental modal tests were conducted.The research results showed that the maximum error range between the natural frequency of experimental modal analysis and the simulation calculation result was within 8%,which was basically consistent with the corresponding natural vibration mode;the simulation calculation and experimental testing modals differed significantly from the operating frequency of the screening machine at 14.17 Hz,with a distance difference of over 10%,avoiding the occurrence of resonance phenomena.After the renovation,the technical performance indicators of the BVB3661 banana screen have been greatly improved compared to the original screen machine,and the screen machine operates more smoothly,and the use effect and reliability have been significantly improved.