【摘要】 基于三维粘弹性人工边界理论,推导建立了类似于普通有限单元而具有粘弹性人工边界特性的三维紧支粘弹性边界单元,并结合UPFs二次开发的特点成功嵌入通用有限元软件ANSYS中。通过Lamb表面源问题和内源问题算例,对上述建立的单元进行了验证,计算结果表明,该单元具有与等效弹簧-阻尼器单元相同的精度和稳定性,并且使用更为简便,可操作性更强,同时基于ANSYS强大的开发平台和非线性计算能力,尚可开展其他特殊用途单元的二次开发。更多还原

【Abstract】 A 3D compact viscous-spring boundary element with stiffness and damping matrixes similar to general finite element was established though viscous-spring artificial boundary theory and embedded in the generalized finite element software ANSYS based on User Programmable Features(UPFs).The lamb problem and inner source problem were analyzed as verification.The results show that the present element has the same good performance of accuracy and stability as the equivalent spring-damper element and the former is more simple and applicable.Further more,with the powerful development platform and numerical solvers in ANSYS,the mentioned method can be extended to add other elements which are used for specific applications to standard ANSYS procedure.更多还原