variable amplitude loading meaning in Chinese

变幅载荷

The law of cumulative damage and its evolution equation of concrete under uniaxial tension with constant amplitude is established , and the validity of which is verified by the test results of variable amplitude loading
定义了损伤变量，得到了损伤积累和演化规律。建立了疲劳损伤模型，并用变幅疲劳试验结果验证了模型的有效性。
In this paper , a lot of macro and micro fracture sections under equal and variable amplitude loads are analyzed on 40cr high - strength bolts by use of scan - electronic microscope . its fatigue mechanism is known fundamentally
本文以螺栓球节点网架中最常用的40cr高强螺栓为研究对象，借助扫描电子显微镜等先进仪器对40个常幅及变幅疲劳试件断口进行了宏观及微观形貌分析，基本摸清了其疲劳破坏的机理。