Optimized Design for the Core Components of the Oscillating Balance Dust Measuring Device

As the core component of the oscillating balance dust measurement device, the resonant element is the key to affect the measurement accuracy of the whole device. Based on the variable density topology optimization method, the resonant element structure of the oscillating balance is optimized to improve the measurement accuracy of the oscillating balance method for dust concentration. Through SolidWorks, the three-dimensional modeling of resonant elements with different shapes is carried out, and the finite element frequency simulation is carried out. According to the structural stiffness and natural frequency of the resonant elements as the optimization objectives, the areas with little influence in the resonant elements are reasonably removed. According to the optimization results, the model is reconstructed and compared with the original structure model. The results show that the mass of the optimized resonant element is reduced by 10.47% compared with the resonant element before optimization, reaching the lightweight design. Compared with the pre-optimization, the no-load frequency is increased by 23.23%, and the sensitivity of the resonant element under different mass loads is increased by 2 times.