# ANSYS is analysed to the method of 3 kinds of to load of missile empennage

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Finite Yuan Jianmo is undertaking with ANSYS finite yuan when the analysis, the stand or fall that unit type opts affects the precision of computational result and validity directly. Compare normally as a result of actual model complex, because this is undertaking finite yuan when the analysis, undertake simplifying appropriately to its on the foundation that assures model validity normally. Because this empennage edge is exhibited to ply change is even, metabolic ratio has 2 only.

86% , and the proportion of the long wide way of alar face and ply direction is very large, because this can choose unit of Shell93 construction housing. Shell93 unit is unit of 3-D8 node housing, there are 6 freedoms to spend on every node. Nextpage 2.

Method of 3 kinds of to load compares pair of specific issues those who simplify to include pair of geometry form not only simplify, return those who include attrib border requirement to simplify. Missile is in flight process, action is moved in the gas on alar face force is very complex, simplify its normally in traditional design for action the concentrated force at pressing a heart. Bring about a structure to slant so at ponderosity, very adverse to reducing the inert quality of spacecraft. Should exhibit bowstring to compare Xiaoshi particularly, press a heart to be apart from alar root and alar tip very close, the method of to load of the concentrated force that press a heart causes very big error necessarily, it is a mistake even. As finite yuan of technical development, the computer is OK the attrib border condition with very complex imitate, can solve in what the problem gives out inside shorter time, reduced computational cycle greatly, raised computational precision. With respect to 3 kinds of to load the method has trade off study below. Method 1: Press to load of heart concentrated force. Undertake to alar face map reseau differentiates above all, the command Node that offers with ANSYS next takes out center of alar face pressure to handle node order, bring to bear on in this node place concentrated force, alar root place restrains X, y, the translation of Z direction and roll, seek solution. Method 2: Divide a range power to load. Above all, the circumstance that distributings alar face according to the load that give out uses coordinate plane to divide small, undertake map reseau differentiates next, become the force amount to that gives out in the title the intensity of pressure on every face, bring to bear on to every small area respectively scale load, bring to bear on to alar root place tie, seek solution. Method 3: Divide a concentrated force to load. Above all, undertake to alar face map reseau differentiates, take out a picture with Node command next 1 in every small pressure center handles node order, bring to bear on the force that gives out in the title to go up to these node, bring to bear on to alar root place tie, seek solution. ANSYS software provided rich aftertreatment means: Unit of cloud atlas law, list law, definition expresses a law to wait, also can examine the result information on some method through defining way in addition. The method that the article uses list law and definition method to above the result of method of 3 kinds of to load had trade off study. Express the 1 comparison that is the means of 3 kinds of to load that list law gets result. By the watch 1 knowable, 1 gotten the biggest displacement is in the method place of tip of the wing on the line that press a heart, the greatest stress is in the place that press a heart, the biggest displacement and stress are latter two kinds of methods are old, and the position is different. Method 2 with the method 3 gotten results are close to very much, the biggest displacement estimates deviation 2.

98% , and deviation of value of the greatest stress has 1 only.

89% , the position that and the biggest displacement is mixed the greatest stress appears is very adjacent also, the biggest displacement appears in alar tip to be in, and the greatest stress appears in alar root to be in, following real test case is consistent. The method that uses ANSYS to offer defines a method, define two way: Alar tip is in (Y=35mm is in) He Yigen is in (Y=0mm is in) . The displacement that handles alar end and the stress that alar root manages part map arrives on these two method. Graph the comparison of Z of place of the 2 tips that it is an ala to displacement result. Graph stress of 3 Mises of place of the root that it is an ala compare a result. (to demonstrate a method clearly 2 with the method the difference of 3, in alar root difference of two upright stress maintains changeless circumstance to fall, will other numeric difference magnified 10 times) . Graph Z of place of 2 wings tip compares result graph to pursue to displacement stress of Mises of place of 3 alas root pursues as a result quite by the graph 2 with the graph 3 knowable, the displacement of the 1 alar tip that with its two kinds of his methods receive mixes the method distributinging photograph ratio fastens the stress of alar root very big, and method 2 with the method 3 gotten displacement values and stress are worth special be identical. 3, conclusion above makes clear as a result quite: (1) although to load method is simple,control standard of to load of heart concentrated force, but the position that its cannot react real danger is nodded as a result and the greatest stress value, cannot reflect a structure correctly suffer force and be out of shape circumstance. (2) theoretic tell, to load of power of cent piece range is right empennage load distributings to be like imitate recently, but this kind of method is more complex in be operated actually. (3) the result that the result that to load of cent piece concentrated force gets follows law of to load of power of cent piece range to get is very adjacent, and this is planted the method is operated very simple. When undertaking an analysis to arc ala especially, when because be in,scale load bringing to bear on in ANSYS, force and to load face are perpendicular, to load of power of cent piece range will be more difficult; Concentrated force to load can have a definition to the direction of force, because this is more agile convenient. Accordingly, the proposal chooses to load of cent piece concentrated force when real to load. CNC Milling CNC Machining