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针对实际工程中常见的桁架结构静不定问题,作者归纳总结材料力学中的各种求解方法,并引入投影法来求解这类静不定问题。实例计算表明,投影法能够简单快捷的建立桁架结构的变形协调方程,避免了力法中求解各杆内力(分别在外力和单位力作用下)计算过程的繁琐,体现了自身的优势。
In order to solve the problem of static indeterminacy of truss structure commonly used in practical engineering, the author summarizes various solving methods in material mechanics and introduces projection method to solve such static indeterminate problems. The case study shows that the projection method can quickly and easily establish the deformation coordination equation of the truss structure and avoid the complicated calculation process of solving the internal forces of each rod (respectively under the external forces and unit forces) in force method, which shows its own advantages.