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基于一定简化原则建立了某型煤粉筛力学模型及振动微分方程,并根据其振动微分方程在Matlab/Simulink中建立了该煤粉筛筛箱动态时域分析模型,对其运动学特性进行时域分析,得到了煤粉筛筛箱动态特性数值解;其次利用虚拟样机技术,通过三维建模软件Pro/E和多体系统动力学软件Recur Dyn,建立了该煤粉筛的虚拟样机模型,通过仿真分析获得煤粉筛工作状态下筛箱各测点的位移、加速度曲线,继而得到筛箱各测点轨迹图;最后对煤粉筛运动特性进行振动测试,将测试结果和仿真分析结果进行了对比分析。通过理论计算、仿真分析和现场测试三者结合验证了设计的合理性及所建模型的正确性,缩短了煤粉筛的研发周期,取得较好的经济效益。
Based on a certain simplification principle, a certain type of pulverized coal sieve mechanics model and vibration differential equation were established. According to the vibration differential equation, the dynamic time-domain analysis model of pulverized coal sieve box was established in Matlab / Simulink. Then, the virtual prototype model of the pulverized coal sieve was established by using the virtual prototyping technology, the three-dimensional modeling software Pro / E and the multi-body system dynamics software Recur Dyn. Through the simulation analysis, the displacements and accelerations curves of each measuring point of the sieve box under the working state of pulverized coal sieve are obtained, and then the loci of the measuring points of the sieve box are obtained. Finally, the vibration characteristics of the coal sieve are tested, and the test results and simulation results are carried out Comparative analysis. Through the combination of theoretical calculation, simulation analysis and on-site testing, the rationality of the design and the correctness of the model are verified, and the research and development cycle of the pulverized coal sieve is shortened, and good economic benefits are obtained.