Fragen zu Steady State Dynamics (Dassault Systemes - PLM Solutions/SIMULIA/ABAQUS)

Hallo,

ich befasse mich im Moment mit der Berechnung von Frequenzgängen über die *STEADY STATE DYNAMICS-Berechnung und habe dazu einige Fragen.

Um mir an einem simplen Beispiel klarmachen zu können, welche Parameter welche Auswirkung auf die Berechnung hat, habe ich einen einfachen Balken-Lastfall erstellt:

Code:

*NODE, NSET = N_BEAM
1, 00.0, 0.0, 0.0
2, 10.0, 0.0, 0.0
3, 20.0, 0.0, 0.0
4, 30.0, 0.0, 0.0
5, 40.0, 0.0, 0.0
6, 50.0, 0.0, 0.0
7, 60.0, 0.0, 0.0
8, 70.0, 0.0, 0.0
9, 80.0, 0.0, 0.0
10, 90.0, 0.0, 0.0
11, 100.0, 0.0, 0.0
12, 110.0, 0.0, 0.0
13, 120.0, 0.0, 0.0
14, 130.0, 0.0, 0.0
15, 140.0, 0.0, 0.0
16, 150.0, 0.0, 0.0
17, 160.0, 0.0, 0.0
18, 170.0, 0.0, 0.0
19, 180.0, 0.0, 0.0
20, 190.0, 0.0, 0.0
21, 200.0, 0.0, 0.0
22, 210.0, 0.0, 0.0
23, 220.0, 0.0, 0.0
24, 230.0, 0.0, 0.0
25, 240.0, 0.0, 0.0
26, 250.0, 0.0, 0.0
27, 260.0, 0.0, 0.0
28, 270.0, 0.0, 0.0
29, 280.0, 0.0, 0.0
30, 290.0, 0.0, 0.0
31, 300.0, 0.0, 0.0
32, 310.0, 0.0, 0.0
33, 320.0, 0.0, 0.0
34, 330.0, 0.0, 0.0
35, 340.0, 0.0, 0.0
36, 350.0, 0.0, 0.0
37, 360.0, 0.0, 0.0
38, 370.0, 0.0, 0.0
39, 380.0, 0.0, 0.0
40, 390.0, 0.0, 0.0
41, 400.0, 0.0, 0.0
42, 410.0, 0.0, 0.0
43, 420.0, 0.0, 0.0
44, 430.0, 0.0, 0.0
45, 440.0, 0.0, 0.0
46, 450.0, 0.0, 0.0
47, 460.0, 0.0, 0.0
48, 470.0, 0.0, 0.0
49, 480.0, 0.0, 0.0
50, 490.0, 0.0, 0.0
51, 500.0, 0.0, 0.0
52, 510.0, 0.0, 0.0
53, 520.0, 0.0, 0.0
54, 530.0, 0.0, 0.0
55, 540.0, 0.0, 0.0
56, 550.0, 0.0, 0.0
57, 560.0, 0.0, 0.0
58, 570.0, 0.0, 0.0
59, 580.0, 0.0, 0.0
60, 590.0, 0.0, 0.0
61, 600.0, 0.0, 0.0
62, 610.0, 0.0, 0.0
63, 620.0, 0.0, 0.0
64, 630.0, 0.0, 0.0
65, 640.0, 0.0, 0.0
66, 650.0, 0.0, 0.0
67, 660.0, 0.0, 0.0
68, 670.0, 0.0, 0.0
69, 680.0, 0.0, 0.0
70, 690.0, 0.0, 0.0
71, 700.0, 0.0, 0.0
72, 710.0, 0.0, 0.0
73, 720.0, 0.0, 0.0
74, 730.0, 0.0, 0.0
75, 740.0, 0.0, 0.0
76, 750.0, 0.0, 0.0
77, 760.0, 0.0, 0.0
78, 770.0, 0.0, 0.0
79, 780.0, 0.0, 0.0
80, 790.0, 0.0, 0.0
81, 800.0, 0.0, 0.0
82, 810.0, 0.0, 0.0
83, 820.0, 0.0, 0.0
84, 830.0, 0.0, 0.0
85, 840.0, 0.0, 0.0
86, 850.0, 0.0, 0.0
87, 860.0, 0.0, 0.0
88, 870.0, 0.0, 0.0
89, 880.0, 0.0, 0.0
90, 890.0, 0.0, 0.0
91, 900.0, 0.0, 0.0
92, 910.0, 0.0, 0.0
93, 920.0, 0.0, 0.0
94, 930.0, 0.0, 0.0
95, 940.0, 0.0, 0.0
96, 950.0, 0.0, 0.0
97, 960.0, 0.0, 0.0
98, 970.0, 0.0, 0.0
99, 980.0, 0.0, 0.0
100, 990.0, 0.0, 0.0
101, 00.0, 10.0, 0.0
102, 10.0, 10.0, 0.0
103, 20.0, 10.0, 0.0
104, 30.0, 10.0, 0.0
105, 40.0, 10.0, 0.0
106, 50.0, 10.0, 0.0
107, 60.0, 10.0, 0.0
108, 70.0, 10.0, 0.0
109, 80.0, 10.0, 0.0
110, 90.0, 10.0, 0.0
111, 100.0, 10.0, 0.0
112, 110.0, 10.0, 0.0
113, 120.0, 10.0, 0.0
114, 130.0, 10.0, 0.0
115, 140.0, 10.0, 0.0
116, 150.0, 10.0, 0.0
117, 160.0, 10.0, 0.0
118, 170.0, 10.0, 0.0
119, 180.0, 10.0, 0.0
120, 190.0, 10.0, 0.0
121, 200.0, 10.0, 0.0
122, 210.0, 10.0, 0.0
123, 220.0, 10.0, 0.0
124, 230.0, 10.0, 0.0
125, 240.0, 10.0, 0.0
126, 250.0, 10.0, 0.0
127, 260.0, 10.0, 0.0
128, 270.0, 10.0, 0.0
129, 280.0, 10.0, 0.0
130, 290.0, 10.0, 0.0
131, 300.0, 10.0, 0.0
132, 310.0, 10.0, 0.0
133, 320.0, 10.0, 0.0
134, 330.0, 10.0, 0.0
135, 340.0, 10.0, 0.0
136, 350.0, 10.0, 0.0
137, 360.0, 10.0, 0.0
138, 370.0, 10.0, 0.0
139, 380.0, 10.0, 0.0
140, 390.0, 10.0, 0.0
141, 400.0, 10.0, 0.0
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143, 420.0, 10.0, 0.0
144, 430.0, 10.0, 0.0
145, 440.0, 10.0, 0.0
146, 450.0, 10.0, 0.0
147, 460.0, 10.0, 0.0
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150, 490.0, 10.0, 0.0
151, 500.0, 10.0, 0.0
152, 510.0, 10.0, 0.0
153, 520.0, 10.0, 0.0
154, 530.0, 10.0, 0.0
155, 540.0, 10.0, 0.0
156, 550.0, 10.0, 0.0
157, 560.0, 10.0, 0.0
158, 570.0, 10.0, 0.0
159, 580.0, 10.0, 0.0
160, 590.0, 10.0, 0.0
161, 600.0, 10.0, 0.0
162, 610.0, 10.0, 0.0
163, 620.0, 10.0, 0.0
164, 630.0, 10.0, 0.0
165, 640.0, 10.0, 0.0
166, 650.0, 10.0, 0.0
167, 660.0, 10.0, 0.0
168, 670.0, 10.0, 0.0
169, 680.0, 10.0, 0.0
170, 690.0, 10.0, 0.0
171, 700.0, 10.0, 0.0
172, 710.0, 10.0, 0.0
173, 720.0, 10.0, 0.0
174, 730.0, 10.0, 0.0
175, 740.0, 10.0, 0.0
176, 750.0, 10.0, 0.0
177, 760.0, 10.0, 0.0
178, 770.0, 10.0, 0.0
179, 780.0, 10.0, 0.0
180, 790.0, 10.0, 0.0
181, 800.0, 10.0, 0.0
182, 810.0, 10.0, 0.0
183, 820.0, 10.0, 0.0
184, 830.0, 10.0, 0.0
185, 840.0, 10.0, 0.0
186, 850.0, 10.0, 0.0
187, 860.0, 10.0, 0.0
188, 870.0, 10.0, 0.0
189, 880.0, 10.0, 0.0
190, 890.0, 10.0, 0.0
191, 900.0, 10.0, 0.0
192, 910.0, 10.0, 0.0
193, 920.0, 10.0, 0.0
194, 930.0, 10.0, 0.0
195, 940.0, 10.0, 0.0
196, 950.0, 10.0, 0.0
197, 960.0, 10.0, 0.0
198, 970.0, 10.0, 0.0
199, 980.0, 10.0, 0.0
200, 990.0, 10.0, 0.0
201, 00.0, 0.0, 10.0
202, 10.0, 0.0, 10.0
203, 20.0, 0.0, 10.0
204, 30.0, 0.0, 10.0
205, 40.0, 0.0, 10.0
206, 50.0, 0.0, 10.0
207, 60.0, 0.0, 10.0
208, 70.0, 0.0, 10.0
209, 80.0, 0.0, 10.0
210, 90.0, 0.0, 10.0
211, 100.0, 0.0, 10.0
212, 110.0, 0.0, 10.0
213, 120.0, 0.0, 10.0
214, 130.0, 0.0, 10.0
215, 140.0, 0.0, 10.0
216, 150.0, 0.0, 10.0
217, 160.0, 0.0, 10.0
218, 170.0, 0.0, 10.0
219, 180.0, 0.0, 10.0
220, 190.0, 0.0, 10.0
221, 200.0, 0.0, 10.0
222, 210.0, 0.0, 10.0
223, 220.0, 0.0, 10.0
224, 230.0, 0.0, 10.0
225, 240.0, 0.0, 10.0
226, 250.0, 0.0, 10.0
227, 260.0, 0.0, 10.0
228, 270.0, 0.0, 10.0
229, 280.0, 0.0, 10.0
230, 290.0, 0.0, 10.0
231, 300.0, 0.0, 10.0
232, 310.0, 0.0, 10.0
233, 320.0, 0.0, 10.0
234, 330.0, 0.0, 10.0
235, 340.0, 0.0, 10.0
236, 350.0, 0.0, 10.0
237, 360.0, 0.0, 10.0
238, 370.0, 0.0, 10.0
239, 380.0, 0.0, 10.0
240, 390.0, 0.0, 10.0
241, 400.0, 0.0, 10.0
242, 410.0, 0.0, 10.0
243, 420.0, 0.0, 10.0
244, 430.0, 0.0, 10.0
245, 440.0, 0.0, 10.0
246, 450.0, 0.0, 10.0
247, 460.0, 0.0, 10.0
248, 470.0, 0.0, 10.0
249, 480.0, 0.0, 10.0
250, 490.0, 0.0, 10.0
251, 500.0, 0.0, 10.0
252, 510.0, 0.0, 10.0
253, 520.0, 0.0, 10.0
254, 530.0, 0.0, 10.0
255, 540.0, 0.0, 10.0
256, 550.0, 0.0, 10.0
257, 560.0, 0.0, 10.0
258, 570.0, 0.0, 10.0
259, 580.0, 0.0, 10.0
260, 590.0, 0.0, 10.0
261, 600.0, 0.0, 10.0
262, 610.0, 0.0, 10.0
263, 620.0, 0.0, 10.0
264, 630.0, 0.0, 10.0
265, 640.0, 0.0, 10.0
266, 650.0, 0.0, 10.0
267, 660.0, 0.0, 10.0
268, 670.0, 0.0, 10.0
269, 680.0, 0.0, 10.0
270, 690.0, 0.0, 10.0
271, 700.0, 0.0, 10.0
272, 710.0, 0.0, 10.0
273, 720.0, 0.0, 10.0
274, 730.0, 0.0, 10.0
275, 740.0, 0.0, 10.0
276, 750.0, 0.0, 10.0
277, 760.0, 0.0, 10.0
278, 770.0, 0.0, 10.0
279, 780.0, 0.0, 10.0
280, 790.0, 0.0, 10.0
281, 800.0, 0.0, 10.0
282, 810.0, 0.0, 10.0
283, 820.0, 0.0, 10.0
284, 830.0, 0.0, 10.0
285, 840.0, 0.0, 10.0
286, 850.0, 0.0, 10.0
287, 860.0, 0.0, 10.0
288, 870.0, 0.0, 10.0
289, 880.0, 0.0, 10.0
290, 890.0, 0.0, 10.0
291, 900.0, 0.0, 10.0
292, 910.0, 0.0, 10.0
293, 920.0, 0.0, 10.0
294, 930.0, 0.0, 10.0
295, 940.0, 0.0, 10.0
296, 950.0, 0.0, 10.0
297, 960.0, 0.0, 10.0
298, 970.0, 0.0, 10.0
299, 980.0, 0.0, 10.0
300, 990.0, 0.0, 10.0
301, 00.0, 10.0, 10.0
302, 10.0, 10.0, 10.0
303, 20.0, 10.0, 10.0
304, 30.0, 10.0, 10.0
305, 40.0, 10.0, 10.0
306, 50.0, 10.0, 10.0
307, 60.0, 10.0, 10.0
308, 70.0, 10.0, 10.0
309, 80.0, 10.0, 10.0
310, 90.0, 10.0, 10.0
311, 100.0, 10.0, 10.0
312, 110.0, 10.0, 10.0
313, 120.0, 10.0, 10.0
314, 130.0, 10.0, 10.0
315, 140.0, 10.0, 10.0
316, 150.0, 10.0, 10.0
317, 160.0, 10.0, 10.0
318, 170.0, 10.0, 10.0
319, 180.0, 10.0, 10.0
320, 190.0, 10.0, 10.0
321, 200.0, 10.0, 10.0
322, 210.0, 10.0, 10.0
323, 220.0, 10.0, 10.0
324, 230.0, 10.0, 10.0
325, 240.0, 10.0, 10.0
326, 250.0, 10.0, 10.0
327, 260.0, 10.0, 10.0
328, 270.0, 10.0, 10.0
329, 280.0, 10.0, 10.0
330, 290.0, 10.0, 10.0
331, 300.0, 10.0, 10.0
332, 310.0, 10.0, 10.0
333, 320.0, 10.0, 10.0
334, 330.0, 10.0, 10.0
335, 340.0, 10.0, 10.0
336, 350.0, 10.0, 10.0
337, 360.0, 10.0, 10.0
338, 370.0, 10.0, 10.0
339, 380.0, 10.0, 10.0
340, 390.0, 10.0, 10.0
341, 400.0, 10.0, 10.0
342, 410.0, 10.0, 10.0
343, 420.0, 10.0, 10.0
344, 430.0, 10.0, 10.0
345, 440.0, 10.0, 10.0
346, 450.0, 10.0, 10.0
347, 460.0, 10.0, 10.0
348, 470.0, 10.0, 10.0
349, 480.0, 10.0, 10.0
350, 490.0, 10.0, 10.0
351, 500.0, 10.0, 10.0
352, 510.0, 10.0, 10.0
353, 520.0, 10.0, 10.0
354, 530.0, 10.0, 10.0
355, 540.0, 10.0, 10.0
356, 550.0, 10.0, 10.0
357, 560.0, 10.0, 10.0
358, 570.0, 10.0, 10.0
359, 580.0, 10.0, 10.0
360, 590.0, 10.0, 10.0
361, 600.0, 10.0, 10.0
362, 610.0, 10.0, 10.0
363, 620.0, 10.0, 10.0
364, 630.0, 10.0, 10.0
365, 640.0, 10.0, 10.0
366, 650.0, 10.0, 10.0
367, 660.0, 10.0, 10.0
368, 670.0, 10.0, 10.0
369, 680.0, 10.0, 10.0
370, 690.0, 10.0, 10.0
371, 700.0, 10.0, 10.0
372, 710.0, 10.0, 10.0
373, 720.0, 10.0, 10.0
374, 730.0, 10.0, 10.0
375, 740.0, 10.0, 10.0
376, 750.0, 10.0, 10.0
377, 760.0, 10.0, 10.0
378, 770.0, 10.0, 10.0
379, 780.0, 10.0, 10.0
380, 790.0, 10.0, 10.0
381, 800.0, 10.0, 10.0
382, 810.0, 10.0, 10.0
383, 820.0, 10.0, 10.0
384, 830.0, 10.0, 10.0
385, 840.0, 10.0, 10.0
386, 850.0, 10.0, 10.0
387, 860.0, 10.0, 10.0
388, 870.0, 10.0, 10.0
389, 880.0, 10.0, 10.0
390, 890.0, 10.0, 10.0
391, 900.0, 10.0, 10.0
392, 910.0, 10.0, 10.0
393, 920.0, 10.0, 10.0
394, 930.0, 10.0, 10.0
395, 940.0, 10.0, 10.0
396, 950.0, 10.0, 10.0
397, 960.0, 10.0, 10.0
398, 970.0, 10.0, 10.0
399, 980.0, 10.0, 10.0
400, 990.0, 10.0, 10.0
*ELEMENT, TYPE = C3D8R, ELSET = E_BEAM
1, 1, 2, 102, 101, 201, 202, 302, 301
2, 2, 3, 103, 102, 202, 203, 303, 302
3, 3, 4, 104, 103, 203, 204, 304, 303
4, 4, 5, 105, 104, 204, 205, 305, 304
5, 5, 6, 106, 105, 205, 206, 306, 305
6, 6, 7, 107, 106, 206, 207, 307, 306
7, 7, 8, 108, 107, 207, 208, 308, 307
8, 8, 9, 109, 108, 208, 209, 309, 308
9, 9, 10, 110, 109, 209, 210, 310, 309
10, 10, 11, 111, 110, 210, 211, 311, 310
11, 11, 12, 112, 111, 211, 212, 312, 311
12, 12, 13, 113, 112, 212, 213, 313, 312
13, 13, 14, 114, 113, 213, 214, 314, 313
14, 14, 15, 115, 114, 214, 215, 315, 314
15, 15, 16, 116, 115, 215, 216, 316, 315
16, 16, 17, 117, 116, 216, 217, 317, 316
17, 17, 18, 118, 117, 217, 218, 318, 317
18, 18, 19, 119, 118, 218, 219, 319, 318
19, 19, 20, 120, 119, 219, 220, 320, 319
20, 20, 21, 121, 120, 220, 221, 321, 320
21, 21, 22, 122, 121, 221, 222, 322, 321
22, 22, 23, 123, 122, 222, 223, 323, 322
23, 23, 24, 124, 123, 223, 224, 324, 323
24, 24, 25, 125, 124, 224, 225, 325, 324
25, 25, 26, 126, 125, 225, 226, 326, 325
26, 26, 27, 127, 126, 226, 227, 327, 326
27, 27, 28, 128, 127, 227, 228, 328, 327
28, 28, 29, 129, 128, 228, 229, 329, 328
29, 29, 30, 130, 129, 229, 230, 330, 329
30, 30, 31, 131, 130, 230, 231, 331, 330
31, 31, 32, 132, 131, 231, 232, 332, 331
32, 32, 33, 133, 132, 232, 233, 333, 332
33, 33, 34, 134, 133, 233, 234, 334, 333
34, 34, 35, 135, 134, 234, 235, 335, 334
35, 35, 36, 136, 135, 235, 236, 336, 335
36, 36, 37, 137, 136, 236, 237, 337, 336
37, 37, 38, 138, 137, 237, 238, 338, 337
38, 38, 39, 139, 138, 238, 239, 339, 338
39, 39, 40, 140, 139, 239, 240, 340, 339
40, 40, 41, 141, 140, 240, 241, 341, 340
41, 41, 42, 142, 141, 241, 242, 342, 341
42, 42, 43, 143, 142, 242, 243, 343, 342
43, 43, 44, 144, 143, 243, 244, 344, 343
44, 44, 45, 145, 144, 244, 245, 345, 344
45, 45, 46, 146, 145, 245, 246, 346, 345
46, 46, 47, 147, 146, 246, 247, 347, 346
47, 47, 48, 148, 147, 247, 248, 348, 347
48, 48, 49, 149, 148, 248, 249, 349, 348
49, 49, 50, 150, 149, 249, 250, 350, 349
50, 50, 51, 151, 150, 250, 251, 351, 350
51, 51, 52, 152, 151, 251, 252, 352, 351
52, 52, 53, 153, 152, 252, 253, 353, 352
53, 53, 54, 154, 153, 253, 254, 354, 353
54, 54, 55, 155, 154, 254, 255, 355, 354
55, 55, 56, 156, 155, 255, 256, 356, 355
56, 56, 57, 157, 156, 256, 257, 357, 356
57, 57, 58, 158, 157, 257, 258, 358, 357
58, 58, 59, 159, 158, 258, 259, 359, 358
59, 59, 60, 160, 159, 259, 260, 360, 359
60, 60, 61, 161, 160, 260, 261, 361, 360
61, 61, 62, 162, 161, 261, 262, 362, 361
62, 62, 63, 163, 162, 262, 263, 363, 362
63, 63, 64, 164, 163, 263, 264, 364, 363
64, 64, 65, 165, 164, 264, 265, 365, 364
65, 65, 66, 166, 165, 265, 266, 366, 365
66, 66, 67, 167, 166, 266, 267, 367, 366
67, 67, 68, 168, 167, 267, 268, 368, 367
68, 68, 69, 169, 168, 268, 269, 369, 368
69, 69, 70, 170, 169, 269, 270, 370, 369
70, 70, 71, 171, 170, 270, 271, 371, 370
71, 71, 72, 172, 171, 271, 272, 372, 371
72, 72, 73, 173, 172, 272, 273, 373, 372
73, 73, 74, 174, 173, 273, 274, 374, 373
74, 74, 75, 175, 174, 274, 275, 375, 374
75, 75, 76, 176, 175, 275, 276, 376, 375
76, 76, 77, 177, 176, 276, 277, 377, 376
77, 77, 78, 178, 177, 277, 278, 378, 377
78, 78, 79, 179, 178, 278, 279, 379, 378
79, 79, 80, 180, 179, 279, 280, 380, 379
80, 80, 81, 181, 180, 280, 281, 381, 380
81, 81, 82, 182, 181, 281, 282, 382, 381
82, 82, 83, 183, 182, 282, 283, 383, 382
83, 83, 84, 184, 183, 283, 284, 384, 383
84, 84, 85, 185, 184, 284, 285, 385, 384
85, 85, 86, 186, 185, 285, 286, 386, 385
86, 86, 87, 187, 186, 286, 287, 387, 386
87, 87, 88, 188, 187, 287, 288, 388, 387
88, 88, 89, 189, 188, 288, 289, 389, 388
89, 89, 90, 190, 189, 289, 290, 390, 389
90, 90, 91, 191, 190, 290, 291, 391, 390
91, 91, 92, 192, 191, 291, 292, 392, 391
92, 92, 93, 193, 192, 292, 293, 393, 392
93, 93, 94, 194, 193, 293, 294, 394, 393
94, 94, 95, 195, 194, 294, 295, 395, 394
95, 95, 96, 196, 195, 295, 296, 396, 395
96, 96, 97, 197, 196, 296, 297, 397, 396
97, 97, 98, 198, 197, 297, 298, 398, 397
98, 98, 99, 199, 198, 298, 299, 399, 398
99, 99, 100, 200, 199, 299, 300, 400, 399
*MATERIAL, NAME = STEEL
*ELASTIC
210000, 0.3
*DENSITY
7.85E-9
*SOLID SECTION, ELSET = E_BEAM, MATERIAL = STEEL
*BOUNDARY
N_BEAM, 3, 3
1, 1, 3
101, 1, 3
201, 1, 3
301, 1, 3
100, 1, 3
200, 1, 3
300, 1, 3
400, 1, 3
**
*AMPLITUDE, NAME = A, VALUE = ABSOLUTE, FIXED INTERVAL = 1.0, BEGIN = 0.0, DEFINITION = EQUALLY SPACED
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0
**
*STEP, NAME = EIGENF, NLGEOM = YES
*FREQUENCY, EIGENSOLVER = LANCZOS, SIM
10, 1.0
*BOUNDARY, OP = NEW
N_BEAM, 3, 3
1, 1, 3
101, 1, 3
201, 1, 3
301, 1, 3
100, 1, 3
200, 1, 3
300, 1, 3
400, 1, 3
**
*OUTPUT, FIELD
*NODE OUTPUT, NSET = N_BEAM
U
*END STEP
**
*STEP, NAME = SSD_1, NLGEOM = YES
*STEADY STATE DYNAMICS, INTERVAL = EIGENFREQUENCY
0.1, 300.0, 5, 1.0
*SELECT EIGENMODES, DEFINITION = MODE NUMBERS, GENERATE
1, 10, 1
*BASE MOTION, DOF = 2, AMPLITUDE = A, TYPE = ACCELERATION
*GLOBAL DAMPING, STRUCTURAL = 0.02
*DLOAD, OP = NEW
, GRAV, 9810.0, 0.0, -1.0, 0.0
**
*OUTPUT, HISTORY, FREQUENCY = 1, VARIABLE = PRESELECT
*NODE OUTPUT, NSET = N_BEAM
A,
U,
*OUTPUT, FIELD, FREQUENCY = 1, VARIABLE = PRESELECT
*END STEP

Hier meine Fragen:

1. Bisher ist es mir nur gelungen über *STEADY STATE DYNAMICS, DIRECT Ergebnisse zu bekommen. Lasse ich diesen Parameter weg, rechne also über die mode-based Variante, habe ich in der Ausgabe nur Ergebnisse für den *FREQUENCY Lastfall. Was mache ich hier falsch?

2. Die Keywords RANGE und EIGENFREQUENCY für INTERVAL ergeben das erwartete Ergebnis, SPREAD verhält sich allerdings nicht wie in der Dokumentation beschrieben. Der SPREAD-Wert scheint überhaupt keinen Einfluss zu haben und die Punkte verteilen sich auch nicht wie beschrieben um die Eigenfrequenzen sondern verteilen sich gleichmäßig zwischen diesen. Woran könnte das liegen?

3. Auch eine Änderung des FREQUENCY SCALE-Parameters ändert nichts an der Auflösung der Punkte. Lediglich der BIAS-Parameter kann die Punkte zu den Eigenfrequenzen (BIAS > 1) oder von ihnen weg (BIAS < 1) schieben. Weder LOGARITHMIC noch LINEAR verändern etwas, wieso?

4. Hängt der Parameter Frequency Scale Factor mit dem in 3. beschriebenen FREQUENCY SCALE zusammen bzw. was bewirkt dieser?

Eine Antwort auf diesen Beitrag verfassen (mit Zitat/Zitat des Beitrags) IP