The brake groan results from the stick-slip moving between the brake disk and pads.
在参阅大量文献的基础上,对制动产生的振动及噪声问题进行了分类,对国内尚未开展研究的制动颤振问题的发生机理、研究方法和影响因素进行了综述:制动颤振的产生是由于制动盘和摩擦衬片之间的粘-滑运动造成的,制动颤振的研究方法主要分为试验研究和理论研究,理论研究又包含线性和非线性系统动力学方法、多体系统动力学方法和有限元法,其影响因素包括系统的摩擦因素、机械系统参数和动力传动系的参数等。
Close your lips tightly and open the nasal path by hanging down the soft palate. Make your vocal cords vibrate and the breath go out from your nose.
发音时，双唇紧闭，软腭下垂打开鼻腔通路，声带颤动，气流从鼻腔透出而发声。
To articulate(a sound)with a trill.
带颤音发出（声音）
But there was a tremble in his voice.
但他的声音却带着颤抖。
twitch or throb with pain.
带着疼痛颤动或者悸动。
To tremble or quaver in sound, as of the voice or a musical note.
颤抖如嗓音或曲调等声音抖动或颤抖
The trilled `r' is produced by vibrating the tongue against the upper teeth.
发带颤音的r, 舌抬向上齿颤动而成.
Now, as he spoke, his voice trembled with that peculiar vibration which is the result of tensity.
他说话时，由于紧张的缘故，声音里带着一种特别的颤抖和振动。
[I]make a long continuous vibrating sound
发出持续颤动的声音
Unpleasant sound or vibration
令人不快的声音或颤动
Her voice shook with emotion.
她的声音因激动而颤抖。
Florid, ornamental vocal trills and runs.
花腔华丽的、装饰性的声音颤动和滑声
The soft vibrant sound made by a cat.
呼噜声，呜呜声猫发出的轻柔颤动的声音
Episodic tremor and slip on the Cascadia subduction zone: the chatter of slient slip
卡斯凯迪亚消减带的幕式颤动和滑动:静滑动震颤
make a vibrant sound, as of some birds.
像鸟一样发出颤动的声音。
(cause sth to)resound or quiver with rapid slight variations of pitch
（使某物）振动出声或发颤音
Her voice shock with excessive emotion.
她的声音因过分激动而颤抖。
"I won't tell you." Ming-feng's voice shook a little.
“不告诉你，”这是鸣凤的微微颤动的声音。
Her ample bosom wobbled as she laughed.
她丰满的乳房随着她的笑声颤动着。