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多个共点力平衡问题,是静力学中常见的问题.多个共点力平衡问题可以转化为三力平衡问题,三力平衡问题又可以转化为二力平衡问题.因此,二力平衡问题是解决多个共点力平衡问题的基础,三力平衡问题是解决多个共点力平衡问题的重点.由于三力平衡问题在静力学问题中占有较重的份量,故本文仅对求解三力平衡问题所运用的数学知识和方法,作粗浅的探讨.
Multiple common-point force balances are common problems in statics. Multiple common-point force balance problems can be converted into three-force balance problems, and three-force balance problems can be transformed into two-force balance problems. Therefore, two-force balance problems It is the basis for solving the problem of multiple common-point force balances, and the three-force balance problem is the key to solving the problem of multiple common-point force balances. Since the three-force balance problem occupies heavier weight in static problems, this article only solves three problems. The mathematical knowledge and methods used in the problem of force balance are discussed in some detail.