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鉴于现有机构受力分析方法不能完全解决具有虚约束机构的受力状况,文中提出了将具有静力确定性机构的力分析法与超静定结构的力分析法相结合的求解方法,对具有虚约束的平行四边形机构进行了受力分析和求解。其步骤是,先应用刚体力学方法求出机构的部分受力,然后引入一垂直于原连架杆的假想刚性连架杆,将机构转化为受力,变形等效的结构,再应用结构力学中的力法进行求解。该方法简便易行,实用性强,其解题思路还可为其他具有虚约束的连杆机构的受力分析提供参考。图3表2参2。
In view of the existing mechanics analysis method can not completely solve the force situation of the virtual constrained mechanism, this paper puts forward the method of combining the force analysis method with statically deterministic mechanism and the force analysis method with statically indeterminate structure, The constrained parallelogram mechanism is subjected to force analysis and solution. The method comprises the following steps of: firstly, applying a rigid body mechanics method to obtain part of the force of the mechanism, then introducing an imaginary rigid connecting rod perpendicular to the original connecting rod, transforming the mechanism into a structure subjected to force and deformation, and applying structural mechanics In the force method to solve. The method is simple and practical and practical. The method of solving the problem can also provide references for the stress analysis of other linkages with virtual constraints. Figure 3 Table 2 Reference 2.