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Influence of the longitudinal displacement on the nonlinear principal parametric resonance of the woodworking bandsaw

机译:纵向位移对木工带锯非线性主参共振的影响

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The transverse vibrations of axially moving Timoshenko beam, as suitable mathematical models for woodworking bandsaws, are investigated. Special attention is paid to the influence of longitudinal displacement effect, as opposed to most models which can be usually encountered in the literature. This influence is introduced through the integro-partial differential equations. The expressions for the mode shapes in the case of hybrid supports with different torsion spring stiffness on the support points are also derived. The influence of mean beam velocity and axial tension on its natural frequencies and mode shapes is also investigated. Based on the nonlinear model, the amplitudes of the steady-state response are calculated for the case of principal parametric resonance. Developed program solution was tested on a number of earlier known examples. Present theoretical considerations, with the help of the program solution, is also used to analyse an example from industrial practice.
机译:作为木工带锯的合适数学模型,研究了轴向移动的蒂莫申科梁的横向振动。与文献中通常会遇到的大多数模型相反,要特别注意纵向位移效应的影响。这种影响是通过整数-偏微分方程引入的。还得出了在混合支撑的情况下在支撑点上具有不同扭转弹簧刚度的模态形状的表达式。还研究了平均光束速度和轴向张力对其固有频率和振型的影响。基于非线性模型,对于主参数共振情况,计算出稳态响应的幅度。开发的程序解决方案已在多个较早的示例中进行了测试。在程序解决方案的帮助下,当前的理论考虑也被用来分析工业实践中的一个例子。

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