中文摘要：

基于开孔泡沫金属的特性,研发板泡式热交换器,通过单轴拉伸试验获得316不锈钢泡沫金属的短时力学性能和长时粘弹性参数,在此基础上引入小挠度薄板理论,将板泡结构简化作支承于地基上的薄板,基于对应性原理和数值逆变换方法,采用FORTRAN90编制程序,计算板泡结构的粘弹性弯曲变形和粘弹性弯曲应力,并与有限元模拟结果进行对比,验证该分析计算方法用于表征承压板泡式热交换器结构粘弹性行为的可行性与准确性。进而分析开孔泡沫金属结构参数对板泡结构的粘弹性弯曲变形和粘弹性弯曲应力的影响情况,结果表明开孔泡沫金属的孔隙率对板泡结构的安全性影响相对较大。

英文摘要：

Plate-foam heat exchanger is developed on the basis of properties of open-cell metal foam.The short-term mechanical properties and long-term viscoelastic parameters of 316 stainless steel metal foam are measured in uniaxial tension experiments.Based on these parameters and small deflection thin plate theory,the plate-foam structure is simplified as a thin plate supported on the foundation.A computer program based on FORTRAN90 is developed by using the correspondence principle and the numerical inversion of Laplace transform.Then the viscoelastic bending deflection and stress of the plate-foam structure are analyzed.The feasibility and accuracy of the method are verified by a comparison of the analytical results with finite element simulations.The results show that the analytical solution is in good agreement with the numerical results.Furthermore,the effects of the structural parameters of the open-cell metal foam on the viscoelastic bending deflection and stress of the plate-foam structure are investigated.The results show that the relative density has a relatively great influence on the safety of the plate-foam structure.