Compared with high pure graphite, the internal friction characteristics of pyrolytic carbon matrix carbon carbon composites were studied in the present work. According to experimental results, two internal friction mechanisms are proposed: thermoelastic and static hysteresis mechanisms. 以高纯石墨为对照材料,初步研究了热解碳基碳/碳复合材料的内耗行为,并根据实验结果提出了碳/碳复合材料的内耗机制:热滞弹性机制与静滞后型内耗机制。
By static experiments, the static hysteresis loop, the relationship of stiffness and amplitude, and the relationship between the energy dissipation coefficient and the amplitude are obtained. 静态实验中得到不同结构参数钢丝绳隔振器的滞迟回线、刚度变形幅值关系曲线和能耗系数变形幅值关系曲线。
The static magnetization curves and hysteresis loops were measured by the ballistic galvanometer. 用冲击检流计法测量了合金的静态磁化曲线和磁滞回线。
The static properties, such as magnetostriction, hysteresis loop, magnetomechanical coupling coefficient were measured with the magnetic measurement system of multiple parameters. 采用多参数磁测量系统对磁致伸缩材料的特性进行了测试及分析。测试了磁致伸缩材料静态特性和动态特性,包括材料的磁致伸缩、磁滞回线、磁机械耦合系数等。
Experiments indicate that this valve has satisfactory static and dynamic performances, the hysteresis less than 0.4% and the frequency width up to 134 Hz. 该阀具有令人满意的静、动态特性,滞回小于0.4%,频宽达134Hz。
Furthermore, the mechanism of internal friction was discussed, and is considered to be a static hysteresis loss associated with the stress-induced movement of coherent interfaces. 最后对产生内耗的机制作了讨论,认为这是一种应力感生共格界面移动所引起的静滞内耗。
Static characteristic experiment results show that multi-layer piezoelectric has hysteresis and creep nonlinear. 静态特性实验结果表明,该执行器具有较大的迟滞非线性及蠕变非线性。
The static test includes static displacement and force output, while dynamic test covers the repeatability, linearity, hysteresis property and response speed of the dynamic output of GMA. The temperature increase of magnetostrictive rod is also tested. 其中静态特性实验包括静态位移输出和静态力输出特性实验,动态特性包括动态位移输出特性、动态动力输出特性和动态响应性特性实验以及温控实验。
A static hysteresis loop test instrumentation is developed, detecting pulse peak by method of cross-zero of pulse peak after differential, acquiring data by microcontroller, displaying hysteresis loop by graphic LCD The test instrumentation has advantages of simple circuit, accurate measurement and visual result. 用脉冲峰值微分过零法检测峰值,单片机采集数据,图形液晶显示磁滞回线,研制静态磁滞回线测试仪,电路简洁,测量准确,结果直观。
It is known that dead-zone is static and backlash can be considered as a single-loop hysteresis. 众所周知,死区是静态的,间隙可以看成是一类只具有主环的单环迟滞。
Through the static experiments, the hysteresis loop of the multi-layer steel plate damper with different parameters and work conditions was presented. 通过静态实验,得出了不同结构参数和不同工作条件下的多层钢板阻尼器弹性迟滞特性。