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工程中许多构件的受力可简化为图1所示情况。下面以(C)为例,说明这些构件所受力的电测法。一般常采用的测量方法如图2所示。因为所以输出电压为比例常数。这种方法的缺点是要求杆件的支承点和受力点间要有足够的位置。为此,测试时往往要重新设计和改装被测构件。根据材料力学理论,图1(C)所示杆件受力状态如图3所示。
The force of many components in the project can be simplified to the situation shown in Fig.1. The following to (C), for example, illustrate the force of these components of the electrical measurement method. Commonly used measurement methods shown in Figure 2. Because the output voltage is proportional constant. The disadvantage of this method is that there must be sufficient position between the point of support and the point of force. To this end, the test often re-design and modification of the measured components. According to the theory of material mechanics, Figure 1 (C) shows the force state of the rod shown in Figure 3.