【摘要】 在谐振筒式密度传感器的结构设计中,近似解析法和有限元矩阵法只能分析固有频率,并且分析精度不高。本文提出了采用ANSYS10.0软件分析的方法,并通过大量的分析计算,总结出谐振子固有频率受结构参数、材料特性和约束条件影响的规律,分析了静压力对谐振子固有频率的影响,以及谐振子的频域响应特性、时域响应特性、谱响应特性等动力学性能。设计了谐振筒式密度传感器,在20℃时的恒温环境下标定了传感器系数,实验表明传感器的测量偏差为0.1%。更多还原

【Abstract】 Analytics and finite element matrix methods can only analyze the natural frequency with low precision,which is not accurate enough for the structure design of cylinder shell resonating density meter.This paper presents finite element method of ANSYS10.0,by means of which the relations between the resonator inherent frequency and the structure parameters,material characteristic and constraint conditions are decided.The influence of static pressure on resonator natural frequency,the resonator response characteristics in frequency domain and time domain,and response spectrum are also analyzed.Then the cylinder shell resonator for density meter is developed,its sensor coefficients are calibrated under constant 20 ℃ environment.Experiment result shows that the relative measurement error of the sensor is only 0.1%.更多还原