Utilizing the character of the spring oscillator acted on by an invariable force,this paper tries to put forward the concept of the equivalent force and the equivalent potential energy of the spring oscillator.

This paper presents a finite element method for predicting the effective elastic properties of composite materials based on the least square method.

This article discusses general condition about closeness of orbit and steadiness of circular orbit for motion of central forces using the curve of equilent potential energ

Selection of spring elastic potential energy zero and its application;

In current teaching,some textbooks and teachers didn t pay enough attention to the concepts of how to chose reference frame and the work done by pairs of inner conservative force in a system so that students couldn [KG-*2〗t understand the concept of elastic potential energy correctly.

The author discusses respectively how the determination of potential-energy zero point influences geopotential energy,elastic potential energy and electrostatic potential energy.

As the elasticity potential energy and the press potential energy are leaded into,so that a bondage problem is transformed into a non-bondage problem,and a resolvent of grads-decline by advanced step is formulated on the basis of the resolvent of grads-d.

In this paper, the general character and individuality of the vibration potential energy and elasticity potential energy is analyzed by an example, and the simple and direct method for solving the problem is given.