共查询到19条相似文献,搜索用时 46 毫秒
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用刚体转动仪测量刚体转动惯量实验所要测量的主要物理量是时间,所测量的实验数据繁多,且要求准确,而后续的实验数据处理计算复杂。本介绍了一种测量时间、计算转动惯量数值两项工作全部由PC机来完成的新方法。 相似文献
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介绍了设计性实验“利用刚体转动惯量实验仪验证转动定律”.该实验要求学生理解刚体动力学原理;利用实验室现有的仪器,对刚体转动惯量实验仪进行改装;提出新的实验原理,可以对阻力矩进行估测,利用该实验装置验证刚体定轴转动定律. 相似文献
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刚体转动实验是普通物理实验的重要内容,该实验一般采用的实验装置“刚体转动仪”的构造原理如图所示。 A是具有不同绕线半径r的塔轮,过其质心两边对称地伸出两根有等分刻度的均匀细圆柱B与B′,B与B′上各套有一个质量均为m_0且可以移动的圆柱形重物。这些构件组成可以绕固定轴OO′转动的刚体系。塔轮上绕有质量可以略去不计的细线,通过质量为m′、半径为r′的滑轮与可以改变质量m的砝码相连。当砝码下落时,通过细线对 相似文献
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刚体转动惯量测定的设计与实验 总被引:2,自引:5,他引:2
目前一些院校物理实验中对刚体转动惯量的测量误差较大,其主要原因之一是停表计时的起、止时间和重物下落的起、止时间不同步造成的.为此我们设计了一种新的测量方法,在教学中收到良好效果.一、实验装置测定匀质盘A的转动惯量的装置如图互所示.盘A可绕过中心的水平转轴转动,在盘边缘上缠上轻质细绳,绳的一端固定在盘边缘,另一端系一质量为m的重物.此重物能被线圈磁铁吸住.磁铁距重物正下方平台上的开关K3的距离为h.先将电秒表C读数复位,在双刀双图1掷开关快速由左合向右的同时,电秒表C启动,重物开始下落.使盘A作匀加速转… 相似文献
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刚体转动实验新测量方法的研究 总被引:2,自引:0,他引:2
本实验是用转动惯量实验仪和电脑计时、计速仪来测量数据,用转动定律和平行移动轴定理推导新的线性方程,再用方程中的自变量和变量关系进行画图,成一条斜直线,从而间接地验证了转动定律和平行移轴定理成立,计算出转动惯量的大小。这种测量方法可达到国内较高的测量水平。与原来的测量方法相比,可消除较大部分系统误差和偶然误差,使数据接近真值,测量方便,重复性好,节省时间,效率高,可实现设备资源共享,可以解决实际问题。 相似文献
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Russian Physics Journal - Definitions are given and properties of the rigid body inertia characteristics are formulated. The influence of the geometrical symmetry of a rigid body on its... 相似文献
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准确地画出了转动系统各物理量间关系与矢量方向;论述了转动惯量实验方程组的建立与求解的完备性;证明了只有传动滑轮质量m0必须非常小时,才会对实验结果影响忽略不计;论证了转动系统平衡条件为满足质心坐标和惯量系数同时为零。 相似文献
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刚体转动惯量测定实验中阻力矩与角速度关系的研究 总被引:1,自引:0,他引:1
利用通用计数器测量了刚体转动过程中阻力矩与角速度之间的定性关系,并对在推导刚体转动惯量的测量公式时所采用的近似方法以及测量刚体转动惯量时由于仪器使用的选择对阻力矩带来的影响作以分析,降低误差。 相似文献
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Biospeckle laser spectral analysis under Inertia Moment, Entropy and Cross-Spectrum methods 总被引:1,自引:0,他引:1
Biospeckle or dynamic speckle can be used as a method for analysing activity, biologic or not, from materials illuminated with laser beam. The Spatial Temporal Speckle (STS) contains data of time information of dynamic speckle and it is used as input for many techniques allowing the analysis of the activity which is being monitored. One question that rises from the manipulation of the STS is related with the information inside it, in particular, whether it is possible to access different frequency behaviors in the time series presented in the STS pattern. This study presents the Inertia Moment, the Wavelets based Entropy and the Cross-Spectrum analysis as approaches that can be used for evaluating the STS spectral content. In a simulation, STS lines have been created based on many frequencies of the fundamental harmonic. This was done for verifying as each method acts when analysing different frequencies, varying harmonics offset and amplitude. These techniques were applied to real database, to validate their action mechanism in real samples. The results present that all techniques were able to verify the spectral content of different harmonics. Inertia Moment was more efficient on analysing high frequencies, because it is a second order moment, being able to obtain more information from high variations on activity. Entropy and Cross-Spectrum, in turn, were better on differing lower frequencies. This was attributed to the convolution proccess, which is present in both methods, filtering high frequencies. Although, any of them returned informations on both high and low frequencies at the same time, they can be used simultaneously, since Entropy and Cross-Spectrum were complementary to Inertia Moment. 相似文献
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扭摆法是测量物体转动惯量的有效方法,减小误差是该实验的关键问题。本文分析了扭摆法测物体转动惯量时空气阻力引起的误差,并给出了加载重物之后扭转系数的变化及其对测量误差的影响。结果对测量精度的提高、实验方法选择和仪器研制等方面具有重要的实际意义。 相似文献
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In the frame of the Fermi dynamical symmetry model, the effect of band crossing modes on the variance of moment of inertia is discussed. It is shown that irrespective of the existence of I1-band, it is the I0-band crossing with the ground band that forms the first backbending. Without band crossing under the backbending, the heritage mixing itself can cause the variance of moment of inertia. The experimental data of well-deformed rare-earth nuclides can be well explained quantitatively with the model. 相似文献