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以直线振动模型机的承重梁为研究对象,基于功率平衡的基本原理,利用Ritz级数法建立了承重梁的动力学模型,分析了承重梁附加物(筛体质量、激振器及减振弹簧等)所引起的附加力作用,并对承重梁进行了固有频率、振型及动态响应等动力学参数的理论计算.经过对设计的振动筛模型机进行的试验研究,理论计算与试验结果相吻合,表明利用功率平衡和Ritz级数法建立的动力学模型具有阶数低、计算稳定性好、精度较高等优点,计算所得的振动筛承重梁各种动力学特性参数能满足工程需要,能够为大型直线振动筛横梁结构的动态设计提供简便的动力学分析和计算方法.
Taking the load-bearing beam of linear vibration model machine as the research object, the dynamic model of the load-bearing beam was established by Ritz series method based on the basic principle of power balance. Spring, etc.), and the theoretical calculation of the dynamic parameters such as natural frequency, mode shape and dynamic response of the bearing beam are carried out.Based on the experimental research, theoretical calculation and test results of the vibrating screen model machine The results show that the kinetic model established by power balance and Ritz series method has the advantages of low order, good stability and high accuracy. The calculated dynamic parameters of the vibrating screen bearing beam can meet the engineering needs, It can provide simple dynamic analysis and calculation method for the dynamic design of beam structure of large linear vibrating screen.