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一般理论力学教材中对平面一般力系平衡方程式都提出了三种不同的形式,唯独对空间一般力系的平衡方程武形式仍然只限于三个力的投影方程和三个力矩方程的单一形式。作者认为除了这种单一的基本形式以外,还可以存在四矩式,五矩武,以至六矩武。并认为这些形式虽然不同,但都是在保证六个独立的方程的前提下的形式上的变化。作者在理论上给出了证明,并对六矩形式给出了应用上的限制条件。
In general theoretical mechanics textbooks, three different forms are proposed for the general equilibrium force equations of the plane, except that the equilibrium equations for general force series are still limited to the three types of force projection equations and the single form of the three moment equations . In addition to this single basic form, the author believes that there can be four-type, five-moment, and even six-force. And although these forms are different, they are all formal changes under the premise of guaranteeing six independent equations. The author gives a proof in theory, and gives the application of the restrictions on the six-moment form.