机构地区: 重庆大学土木工程学院
出 处: 《机械工程学报》 2000年第9期20-25,共6页
摘 要: 讨论了数值流形方法使用高阶覆盖位移函数时权函数、位移函数的选择和位移边界条件的处理。对该方法得到的高精度位移解,利用滑动最小二乘法在全域上构造位移近似函数,得到了与位移解一样连续的应力解。算例结果表明,理论和方法是正确、有效的。 The selections of the weighted factor and the displ acement function in numerical manifold method(NMM)which using high order cover functions are discussed,and the enforcing methods of the essential boundary cond itions are also given in this paper.In order to obtain the continuous and accura te stresses as the same as the displacement,moving least square(MLS)interpolant s are used to construct whole approximations.The numerical examples indicate tha t the theory and method are accurate and effective.