真空灭菌器力学性能的实验和数值模拟分析  

Analyses of Mechanical Behaviour of the Vacuum Sterilizer by Experiment and Numerical Simulation

作　　者：宇慧平[1] 隋允康[1] 张亦良[1] 赵尔冰[2] 岳彩锐[1] 薛贵林[1] 

机构地区：[1]北京工业大学工程数值模拟中心,北京100022 [2]北京市朝阳区特种设备检测所,北京100021

出　　处：《科技导报》2008年第16期50-54,共5页Science & Technology Review

基　　金：国家自然科学基金项目(10472003);北京市教委科研项目(KM200710005032)

摘　　要：特种设备检测中发现一些真空灭菌器在远未达到使用寿命时,灭菌器的内壁就出现断续的裂纹,大部分集中在加强筋与内壁的焊缝处。为追寻其力学原因,采用电测法对真空灭菌器进行应力测试;然后使用MSC.Patran&MSC.Nastran数值分析软件进行力学分析。与实验所测的应力结果进行对比,结果表明数值解与实验结果非常吻合。此外,研究了真空灭菌器内壁的折弯圆弧半径的大小对应力的影响,得出半径的大小对内壁应力分布的影响很小。因此,为了扩大内腔的容积,在保证顺利折弯的前提下,可以选择小的半径;进而为下一步结构优化提高重要参考数据。Although some vacuum sterilizers have not reached their service lifetime, some typically intermittent cracks may be detected on the weld of stiffeners and on the inner wall. In order to make a mechanical analysis, a strain gauge measurement was made, and the numerical analysis software MSC.Patran ＆ MSC.Nastran was used to calculate the strain. The measurement results agree with the numerical simulation results. The bend circular arc radius size of the vacuum sterilizer is also considered, and it is shown that the radius has little influence on the stress distribution. Therefore, it is advisable to choose a small radius for increasing the cavity volume if the knee bend is smooth enough. Some important data have been obtained for the future structure optimization.

关 键 词：MSC.Patran&MSC.Nastran 数值模拟 真空灭菌器 使用寿命 

分 类 号：O348[理学—固体力学]