摘要
在风洞实验中,腹撑常做为模型的支撑方式。这种支撑方式在常规低速风洞中的应用是较成熟的,但在低速增压风洞中的研究相对较少。低速增压风洞载荷大,为保证低速增压风洞中的试验安全进行,必须对其刚度和强度进行严格的校核计算。在应用有限元软件进行校核计算时,只有对机构真实模拟才能得到真实的结果。基于曲柄滑块机构的实际运动情况,提出了在有限元分析软件Patran/Nastran中创建铰链的方法,并通过不同的加载方式和不同的模型处理方式对此方法进行了验证。结果表明提出的方法能非常真实地模拟铰链。
Belly-up often be used to support a model in wind tunnel experiments. Such support has a mature application in the conventional low-speed wind tunnel experiments ,while is investigated very less in pressure-low-speed wind tunnel experiments. The stiffness and strength of the support must be evaluated in the pressure-low-speed wind tunnel tests ,which exert a greater load to the specimen,for the safety of the tests. In the application af finite element software to check the calculation,accuracy results are induced only if the mechanism is exactly modeled. It presents an accurate method to model the hinge in the finite element analysis software Patran/Nastran base on the actual campaign of the slider-crank mechanism,and verifies the method through different ways to load on different models. The results show that the method presented it is very effective to create accurate hinge model.
出处
《机械设计与制造》
北大核心
2009年第10期232-234,共3页
Machinery Design & Manufacture
