物体受力分析的标号法求解

举例说明了传统的物体受力分析方法,并提出了以受力点为核心的标号法.对同一问题采用两种方法分别进行分析.对两种不同的方法进行比较,结果表明,标号法步骤明确、条理清晰、思路简单、易于掌握、解题快捷.该方法遵循由简单到复杂的规律,逐步标号,按照先找受力点,次找二力杆,再找三力汇交,最后对于无法判断受力方向的受力点标Fx、Fy的作图步骤,并配合以受力分析流程图,使过去教学中的难点变得轻松易学.这种逐步标号的授课方法可推广到其他学科的讲授中.

A new method of free-body diagram

The common method of free body diagram was exemplified,and a new labeling method of free body diagram based on force bearing point was intruduced.Tow same questions were worked out by these tow mtethods respectively.The result were same.Contrasted with the common method,the new was easy to grasp and improved efficiency of solving questions.The new method was based on the idea of labeling method.The steps of the new method are searching force bearing point,searching tow-force member,searching three concurrent forces and marking F_x,F_y step by step.A flow chart was provided to illustrate the new method further.Thismethod is meaningful in teaching other knowledge.