【习题】V2 导弹尾翼振动模态分析 ？

FreddyMusic

【习题】V2 导弹尾翼振动模态分析 ？ / Modal Analysis of a V2 missile Blade ？

加分题，很简单。（5分以上者，就不用做了）

老规矩：贴出答案 +1 分，　贴出命令流 +3 分 （认真编辑）

题目在老外的网站上（略有窜改 ）
http://www.andrew.cmu.edu/course/24-ansys/htm/v1_turbine.htm

Vibration #1: Modal Analysis of a Turbine

Introduction: In the area of dynamics and vibrations the natural frequencies of a structure is of great importance to determine whether a structure can withstand excitation from the surroundings. In this example, we will learn to model a turbine and then determine its first few natural frequencies.

Physical Problem: To determine the natural frequencies of the turbine shown in the figure. Modal analysis means the calculation of the natural frequencies of a mechanical system. It also involves the calculation of the mode shapes.

Problem Description:
We will model the turbine as a disk with blades fixed on it ('blisk'=bladed disk). The inner radius of the hub is 10 cm, outer radius is 40 cm, blade length is 20 cm, blade width is 5 cm, and the thickness is 2.5 mm

Material: Assume the structure is made of steel with modulus of elasticity E=210 GPa and has a Poisson ratio of 0.3 and density of 7.21e3 kg/cubic meter.

Boundary conditions: The blisk is fixed around the inner diameter of the disk.

Loading: The blisk is not loaded.

Objective:  To determine first three family of modes.

To animate the mode shape of the first 3 modes.

You are required to hand in print outs for the above. You don't have to hand in the animation files but you will have to give at least 3 captured frames of the animation for each of the three modes.

fjz_1

first,thank my lord for helping the poors so much ,let me try!

FreddyMusic

fjz_1,

Please don't call me " My Lord ".  I am FreddyMusic.

Make your effort in simwe, You would prove yourself.

Regards,

FreddyMusic

fjz_1

I have done it ,and have uploaded the command stream that I have dealed with.But there is a problem,the result seems incorrect.

FreddyMusic

anyone can solve the problem ? + 2 score

fjz_1

ok，FreddyMusic

hai00011

把原题给我吧，我看看能不能解决，呵呵

FreddyMusic

原帖由 hai00011 于 2006/9/30 17:18 发表
把原题给我吧，我看看能不能解决，呵呵

OK, hai00011, This is PDF.


This thread is a well-designed Tutorial for beginner of ANSYS.

You has made two, suppose not difficult for you to make the third.

It's great recommend to explore yourself for more engineering problem.

Try this one and get some new feeling on ANSYS. A Small Challange.

http://www.simwe.com/forum/thread-735124-1-2.html

hai00011

ok,i accept this new challange

sgly

I just follow the instruction!

FreddyMusic

I just follow the instruction!
sgly 发表于 2009-3-22 18:49

The game is over. Thanks for paticipate.

shine1270

介个......................

shine1270

大赞一个!精华!!!!

lemontree1982

thanks for sharing

lyy6912

不错，谢谢分享

anbang

。。。。。。。。。。。。。。。。。

没什么不可一

看过  希望在国内尽量使用中文交流，也不是很难的语句。

bit008

niu，you talk in english, to qifu men!