Spherical-Cymbal换能器端帽自由胀形过程建模  

Modeling of the Free-Bulging Process of Spherical-Cymbal Transducer's End-Caps

作　　者：吴石林[1] 张玘[1] 黄芝平[1] 

机构地区：[1]国防科学技术大学仪器科学与技术系,长沙410073

出　　处：《传感技术学报》2011年第2期180-184,共5页Chinese Journal of Sensors and Actuators

基　　金：国家863高技术项目(2009AA7043001)

摘　　要：为掌握Spherical-Cymbal换能器端帽自由胀形的成形规律,在端帽材料选定、几何尺寸(包括外径D、空腔底部直径dc和厚度te)及胀形压边力不变且线性加载等约束条件下,采用ANSYS/LS-DYNA软件对几种不同加载终压P下端帽的自由胀形成形过程进行了数值模拟。通过非线性曲线拟合分别得到了加载后端帽中心高度与加载终压(HP-P)、卸载回弹量与加载终压(ΔH-P)及卸载后端帽中心高度与加载终压(H-P)之间关系的数学模型。实验结果表明,在以上约束条件下,所建数学模型揭示了Spherical-Cymbal换能器端帽的自由胀形成形规律,可用于指导实际生产。In order to master the rules of the free bulging process of Spherical-Cymbal transducer＇s end-caps,ANSYS/LS-DYNA software is used to simulate the free-bulging process under the restrictions of selected end-cap＇s materials,fixed dimension（including diameter D,cavity bottom diameter dc and thickness te）,fixed blank holder force and linear load.Mathematic models,such as center height after loaded to pressure（HP-P）,spring-back to pressure（ΔH-P）and center height after unload to pressure（H-P）,are gained by nonlinear curve fitting.Experiments results prove that these mathematic models can reveal the shaping rules of the free bulging process of Spherical-Cymbal transducer＇s end-caps under the restrictions,and therefore can be used to guide production.

关 键 词：Spherical-Cymbal换能器 数学模型 数值模拟 自由胀形 端帽 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]