共查询到18条相似文献,搜索用时 62 毫秒
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以均匀电场中无阻力作用的单摆作为物理模型。从单摆运动方程出发,首先我们用mathematica软件数值求解给出了小角度下单摆振动图像;其次数值研究了单摆振动周期与电场强度变化的关系。结果表明,在小角度下数值周期和公式周期非常一致,表明了数值方法的有效性、可靠性和一致性。 相似文献
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陈俊 《郧阳师范高等专科学校学报》1999,(6)
从理论和数值计算上分析了单摆周期与单摆摆动最大幅用的关系;指出可以通过控制单摆摆动最大幅角,使周期公式求得的单摆周期的误差满足要求,从而也就得到了周期公式的适用范围;并引入了一个单摆周期的修正公式. 相似文献
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本文用非线性理论分析了单摆的运动,讨论对单摆进行测量时应该怎样选取单摆时点才能尽可能减小测量误差。 相似文献
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从线性到非线性,从有规律到不可预测,由浅入深地全面分析了单摆的运动情况。又从单摆这个系统出发简单介绍了混沌理论,包括混沌在中国古代、西方文化、不同学科中都有不同含义,进而阐明混沌现象实际上是无处不在的。 相似文献
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文军 《渭南师范学院学报》2011,(8):71-74
大学教学向学生传递科学思想,培养学生科学素养.以单摆研究性教学为例,分析了单摆摆角、摆线伸长量、介质阻尼、密度等与周期的关系以及单摆的非线性等问题.通过对单摆教学内容的拓展,使学生体验发现问题、解决问题的"研究"过程,为将来从事科学研究奠定基础. 相似文献
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C. Medina 《Science & Education》2004,13(7-8):631-640
This paper conveys information about a Physicslaboratory experiment for students with some theoretical knowledge about oscillatory motion. Students construct a simple pendulum that behaves as an ideal one, and analyze model assumption incidence on its period. The following aspects are quantitatively analyzed: vanishing friction, small amplitude, not extensible string, point mass of the body, and vanishing mass of the string. It is concluded that model assumptions are easilyaccomplished in practice, within small experimental errors. Furthermore, this way of carrying out the usual pendulum experiments promotes a better understanding of the scientific modeling process. It allows a deeper comprehension of those physical concepts associated with model assumptions (small amplitude, point mass, etc.), whose physical and epistemological meanings appear clearly related to the model context. Students are introduced to a scientific way of controlling the validity of theoretical development, and they learn to value the power and applicability of scientific modeling. 相似文献
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C. Medina 《Science & Education》2004,13(7):631-640
This paper conveys information about a Physicslaboratory experiment for students with some theoretical knowledge about oscillatory motion. Students construct a simple pendulum that behaves as an ideal one, and analyze model assumption incidence on its period. The following aspects are quantitatively analyzed: vanishing friction, small amplitude, not extensible string, point mass of the body, and vanishing mass of the string.It is concluded that model assumptions are easilyaccomplished in practice, within small experimental errors. Furthermore, this way of carrying out the usual pendulum experiments promotes a better understanding of the scientific modeling process. It allows a deeper comprehension of those physical concepts associated with model assumptions (small amplitude, point mass, etc.), whose physical and epistemological meanings appear clearly related to the model context. Students are introduced to a scientific way of controlling the validity of theoretical development, and they learn to value the power and applicability of scientific modeling. 相似文献
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何松林 《实验室研究与探索》2011,30(6)
由摆球浸入不同温度纯水中的小角阻尼振动实验,发现角振幅衰减及振动周期不随液体黏度发生改变。采用改进平均法求解平方阻尼作用下单摆小角振动微分方程,得到角位移随时间变化的解析表达式,据此得到的角振幅衰减及振动周期的定量结果与实验数据符合。得出结论:摆球在液体中振动时受到的流体阻力是与液体黏度无关的平方阻力;平方阻尼常量与液体的密度成正比,与摆球半径及密度的乘积成反比;摆球浸入液体时的阻尼振动、角振幅衰减是非指数型的,衰减速度和振动周期都与平方阻尼常量密切相关。 相似文献