请问“三重点理论”是指什么

escapist

我经常听人提起，可不清楚具体内容是什么。何谓三重点理论，多谢！

supervb

“三重点”调频理论——黄文虎提出，利用这种方法，设计出的长叶片既轻巧又安全，节省了大量合金材料。这一理论在当时是国内外首创，填补了我国汽轮机长叶片振动计算的空白，取得了巨大的经济效益和社会效益。这个理论在国际上也得到了公认，被选登在具有国际权威的美国《航空航天学报》上。

xjtu211

supervb

请自行到图书馆检索黄文虎先生的文章，未能提供更多帮助，非常抱歉！

escapist

好像是,激励力的频率阶数与固有频率的阶数相同,且两个频率相等时,最危险.所以要避开三重点

zhj307

thank you!!!!!

ym_tang1225

楼上的高人最好可以给本书的名字。好让我们后生有的放矢。

xueshixin02

三重点理论 你可以 google 一下。
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http://scholar.google.cn/scholar?q=%E4%B8%89%E9%87%8D%E7%82%B9%E7%90%86%E8%AE%BA+%E9%BB%84%E6%96%87%E8%99%8E&hl=zh-CN&lr=&btnG=%E6%90%9C%E7%B4%A2&lr=
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escapist

Ｈｕａｎｇ Ｗｅｎｈｕ．Ｆｒｅｅ ａｎｄ ｆｏｒｃｅｄ ｖｉｂｒａｔｉｏｎｓ ｏｆ ｃｌｏｓｅｌｙ ｃｏｕｐｌｅｄ ｔｕｒｂｏ－ｍａｃｈｉｎｅｒｙ ｂｌａｄｅｓ．ＡＩＡＡ Ｊｏｕｒｎａｌ，１９８１，１９（７）．
这篇文献中好像提出了三重点理论.

xueshixin02

应该就是这篇文章吧！
Free and Forced Vibration of Closely
Coupled Turbomachinery Blades
Wen-hu Huang*
Harbin Institute of Technology, Harbin, China
This paper deals with the free and forced vibration of closely coupled turbomachinery blades on a disk which
are connected by elements forming a circumferentially continuous periodic structure that will be called a
rotationally periodic structure in this paper. A computational procedure for calculating the free vibration of
rotationally periodic structures with various types of connecting elements is obtained by a transfer matrix
method. The method of analysis for a packet formed by a finite number of blades is also discussed. The forced
vibration and the condition of resonance of a rotationally periodic structure under a time-varying periodic
excitation are studied, and a vibration design criterion is suggested.
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As these three quantities must coincide with each other,
hence this condition of resonance may be called "the triplecoincidence
condition," The condition of avoiding triple
coincidence may be suggested as a vibration design criterion
for blades of this type.
The above conclusion

xueshixin02

Vibration of Some Structures with Periodic Random Parameters
Wen-huHuang*
Harbin Institute of Technology, Harbin, China
In a periodic structural system, such as blades in a closed packet of turbomachinery, the natural frequencies of
the individual blades can be randomly different from one another. This paper describes a solution for such a
periodic structure in which the distributions of blade frequencies are random processes with small standard
deviations. A spectral method is suggested to solve differential equations with random coefficients. The expressions
for vibration modes are given; the standard deviations of natural frequencies are estimated, and the
results of forced vibration are presented. Some special features of vibration characteristics of this system are
shown as well.
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这篇AIAA文章也提到的“三重点理论”

xueshixin02

被选登在具有国际权威的美国《航空航天学报》上。
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航空航天学报，你说AIAA就行了。