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针对二维超声阵列换能器的声场仿真,以xMATRIX超声换能器结构为原型,设计仿真实验对分割阵元空间脉冲响应模型和离散点阵代表模型的计算精度、计算效率、影响参数和适用场合进行了分析比较。结果表明,分割阵元空间脉冲响应模型计算速度快,精度高,对阵元尺寸、阵元间距、聚焦深度及阵元高宽比例敏感,广泛应用于均匀介质中的声场仿真。离散点阵代表模型计算成本高,对阵元数目和阵元代表点数敏感,便于进行非均匀介质中任意形状换能器阵列的声场仿真。在相同阵列孔径和激励脉冲下,分割阵元空间脉冲响应模型的计算精度比离散点阵代表模型高6%左右,二维声压曲线和三维声场的计算速度分别比离散点阵代表模型快20倍和1000倍。
Aimed at the acoustic field simulation of two-dimensional ultrasonic array transducer, the structure of xMATRIX ultrasonic transducer is taken as a prototype. The simulation experiment is carried out to calculate the precision, calculation efficiency, influence parameter and application of space impulse response model and discrete lattice representative model Occasions were analyzed and compared. The results show that the partitioned space element impulse response model is fast and accurate, and is sensitive to the element size, array element spacing, depth of focus and aspect ratio. It is widely used in sound field simulation in homogeneous media. The discrete dot matrix model is computationally expensive, sensitive to the number of array elements and the number of array elements, and facilitates the simulation of sound field of an arbitrary shape transducer array in inhomogeneous media. Under the same array aperture and excitation pulse, the computational accuracy of the impulse response model of the partitioned elements is about 6% higher than that of the discrete lattice model, and the calculation speed of two-dimensional sound pressure curve and three-dimensional sound field is 20 Times and 1000 times.