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单词 pendulum
释义

pendulum /ˈpendjələm//ˈpendʒələm/

英汉-汉英词典
n. 钟摆;摇锤;摇摆不定的事态
词组 | 习惯用语
inverted pendulum 倒立摆;倒摆
simple pendulum 单摆;数学摆
compound pendulum [物]复摆;[物]物理摆(等于physical pendulum)
foucault's pendulum 傅科摆
torsion pendulum 扭秤;扭转摆
pendulum swing 测锤摆幅
pendulum clock 摆钟
英语例句库
  1. The pendulum swings.
    钟摆摆动。
  2. A pendulum vibrating seconds.
    钟摆以摆动指示秒数。
  3. The damping principle of high rise multistorey buildings equipped with suspension-mass pendulums was discussed and their damping performance was investigated.
    摘要论述了在高层建筑结构中利用悬吊质量摆减震的原理并对其减震性能进行了研究。
  4. Based on the principle of compound pendulum,the measurement method and corresponding equipment for the centroidal deviation and the rotary inertia of rocket projectile were described.
    基于复摆原理,阐述了箭弹的质偏和转动惯量的测量方法及装置,推导出了质偏和转动惯量的计算公式。
  5. According to the measure of trilinear torsion pendulum and mechanical vibration theory, this paper presents the measure of compound trilinear torsion pendulum.
    本文在总结国内外大量文献的基础上,对PALIO轿车动力总成悬置系统隔振问题进行了深入地技术研究。

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原声例句
TED演讲(音频版) 2015年3月合集

So architects get frustrated, and we start pushing the pendulum back into the other direction.

就这样,建筑师感到沮丧了,于是我们把钟摆又推回了另一个方向。

透视百科科技类

Fourth, you had wildly fluctuating emotions like a pendulum.

第四,你的情绪如摆钟一样波动很大。

哈佛大学《幸福课》

Ignoring all the rest that are not. Overdoing this class is shifting the pendulum.

忽略其余不起作用的 我们要做的就像是改变钟摆幅度

摇滚纪录片

The... pendulum went back to America.

摇滚乐的钟摆又摆回了美国。

6 Minute English 六分钟英语

’The pendulum on my Grandfather Clock has stopped swinging. ’

“我的老爷钟上的钟摆不动了。”

演员对谈(双语精选)

And then the pendulum swings over here.

然后钟摆摆到这里。

CNN 10 学生英语 2023年3月合集

But now the pendulum has swung.

但现在,局势发生了变化。

奥巴马每周电视讲话

Our success depends on our participation, regardless of which way the pendulum of power swings.

我们的成功取决于我们的参与, 不管权力的钟摆如何摆动。

美国原版语文第五册

The pendulum complied, and ticked six times at its usual pace.

按照正常的节奏,钟摆顺从地滴答了六次。

美国原版语文第三册

This set him thinking, and it led to the invention of the pendulum.

这让他陷入了思考之中,从而导致了钟摆的发明。

中文百科

傅科摆
钟摆原理
sin θ 取为θ的误差。

是一种实验仪器,可用来展现种种力学现象。最基本的摆由一条绳或竿,和一个锤组成。锤系在绳的下方,绳的另一端固定。当推动摆时,锤来回移动。摆可以作一个计时器。

则可使用下列公式算出它的振动周期。

一物体正在摆荡最高处(此时v=0),绳和中间绳有夹角\theta,绳长为L,相对于中间摆物的位移为x

此物体受下列力的影响

绳子的拉力F有分力

\because \underset{\theta \to 0}{\mathop{\lim }}\,\cos \theta =1
\therefore F \approx  m_Gg
 F \sin{\theta} = m_Gg \left( \frac{x}{L} \right) = k x
解得  k = \frac{m_Gg}{L}

代入  T = 2 \pi \sqrt{\frac{m_I}{k}}

得到  T = 2 \pi \sqrt{\frac{m_IL}{m_Gg}}

根据广义相对论可知, m_I = m_G\,

T= 2\pi \sqrt{\frac{L}{g}}

L 为绳的长度, \theta 为绳和垂直平面的线的交角,\theta_0\theta 的最大值,m 为锤的质量,\ddot{\theta} 表示角度加速度 \alpha = \frac{{\rm{d}}^2 \theta}{{\rm{d}} t^2}

忽略空气阻力以及绳的弹性、重量的影响:

注意不论θ的值为何,运动周期和锤的质量无关。

英语百科

Pendulum 摆

PendulumAnimation of a pendulum showing forces acting on the bob: the tension T in the rod and the gravitational force mg.Animation of a pendulum showing the velocity and acceleration vectors.
The true period is shown as a solid pendulum, the simple period equation is shown as an empty pendulum

A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing.

近义、反义、联想词
近义词
n.
apparatus, setup

联想词
swing摇摆;swinging活跃的;swung摇摆;oscillation振动;inertia惯性;lever杠杆;tilt倾斜;clocks钟表;inertial惯性的;
英英词典
pendulum n.
  1. an apparatus consisting of an object mounted so that it swings freely under the influence of gravity
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更新时间:2025/6/18 5:12:46