随即震动分析为什么要先进行频率相应分析 abaqus振动响应分析中激励力的加载方法
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\u3000\u3000abaqus\u632f\u52a8\u54cd\u5e94\u5206\u6790\u4e2d\u6fc0\u52b1\u529b\u7684\u52a0\u8f7d\u65b9\u6cd5\uff1a
\u3000\u3000\u2460\u3000\u5b9a\u4e49\u968f\u673a\u6fc0\u52b1PSD\u66f2\u7ebf\u7684\u5173\u952e\u5b57\u4e3a\uff1a
\u3000\u3000*PSD-DEFINITION, NAME=psd-name
\u3000\u3000\u2461\u3000CAE\u73af\u5883\u5b9a\u4e49PSD\u3002
\u3000\u3000\u5176\u4e2d\uff1a
\u3000\u3000TYPE = BASE \u4e3a\u57fa\u7840\u6fc0\u52b1
\u3000\u3000G\u4e3a\u53c2\u8003\u52a0\u901f\u5ea6\uff0c\u9ed8\u8ba4\u4e3a1\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u81ea\u884c\u5b9a\u4e49\u3002
\u3000\u3000TYPE = FORCE \u96c6\u4e2d\u529b\u3001\u5206\u5e03\u8f7d\u8377\u7b49
\u3000\u3000TYPE = DB \u4e3a\u5206\u8d1d
\u3000\u3000\u2462\u3000\u5229\u7528\u5173\u952e\u5b57\u5b9a\u4e49PSD
\u3000\u3000*PSD-DEFINITION, NAME = BASE-VERT,
\u3000\u3000TYPE = BASE, G = 9.81
\u3000\u30000.032, 0.0, 1.0
\u3000\u30000.032, 0.0, 2001.0
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