中文摘要：

针对文献提出的用于换料方案快速评价的低阶谐波展开法,提出用一阶微扰方法来替代原先经验性的扰动基函数产生方法,从而使低阶谐波展开法的理论更完善、适用性更广、精度更高。

英文摘要：

Instead of the empirical direct substitution method used in former harmonic expansion method for the generation of perturbation base functions, a more rigorous 1^st order perturbation method was proposed to generate the perturbation base functions. Numerical results for the enumerating loading pattern evaluation problem demonstrate that the new method is more generic and accurate, and makes the harmonic expansion method more promising.