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输送机线性系统的假设是在胶带力学特性和弹性模量不变的情况下近似提出的 .这种假设会使大型输送机产生理论误差和不正确的动力学仿真结果 .本文分析了基于胶带悬垂度的非线性特性 ,推导了等效弹性模量的表达式 ,研究了胶带等效弹性模量和弹性模量之间的关系 ,并发现两者的比值在 0 .1～ 1.0之间变化 .提出了输送机有限单元模型的非线性运动方程及其增量方程和数值解法 .通过对一输送机动态特性的仿真分析 ,发现用线性和非线性 2种模型 ,它们动态参数 (如带速 ,胶带加速度 ,张力以及重锤位移和张力波速 )的计算误差介于 6 %～ 5 0 %之间 .
The assumption of the linear system of the conveyor is approximated by the fact that the mechanical properties of the tape and the modulus of elasticity are the same, which will lead to theoretical errors and incorrect dynamics simulation results on large conveyors.In this paper, Degree of non-linearity, the expression of equivalent elastic modulus was deduced. The relationship between the equivalent elastic modulus and the elastic modulus of the tape was studied, and the ratio of the two was found to vary from 0.1 to 1.0. A nonlinear finite element model of the conveyor is proposed and its incremental equations and numerical solutions are presented. By analyzing the dynamic characteristics of a conveyor, it is found that the dynamic and dynamic parameters (such as belt speed, Tape acceleration, tension, and weight displacement and tension wave velocity) error is between 6% ~ 50%.