| 用自由度凝聚法确定曲轴的耦合刚度 |
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| 引用本文： | 宋希庚,薛冬新.用自由度凝聚法确定曲轴的耦合刚度[J].大连理工大学学报,1996,36(5):572-575,615. |
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| 作者姓名： | 宋希庚 薛冬新 |
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| 作者单位： | 大连理工大学内燃机研究所 |
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| 基金项目： | 船舶工业国防科技“八五”预研项目 |
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| 摘 要： | 提出了一种精度计算曲轴耦合刚度的方法，首先用三维有限元模型生成曲柄模型的整体刚度阵，然后分三步进行自由度凝集，主自由度凝聚，铁木辛柯梁段九自由度凝聚，四自由度主坐标凝聚，最终求出半个曲柄的耦合刚度，与实测结果相比较，取得令人满意的结果。
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| 关 键 词： | 柴油机 曲轴 振动 刚度 自由度凝聚法 耦合振动 |
Determination of crankshaft coupled stiffness by using static condensation of degrees of freedom |
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| Song Xigeng,Xue Dongxin,Niu Pengshun.Determination of crankshaft coupled stiffness by using static condensation of degrees of freedom[J].Journal of Dalian University of Technology,1996,36(5):572-575,615. |
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| Authors: | Song Xigeng Xue Dongxin Niu Pengshun |
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| Abstract: | A calculation method of coupled stiffness of crankshaft in diesel engine is presented based on static condensation of degrees of freedom in finite element method. Through 3 steps in the condensation, the coupled stiffness of crankshaft is determinated. Using the method, the coupled vibrations of the crankshafting in B &W6S70MC diesel engine are calculated and the calculated results are compared with those of measurement on ship. The comparison shows that the method introduced is helpful to solving coupled vibration problems of crankshaft systems. |
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| Keywords: | diesel engines crankshaft vibration coupling stiffness/condensation method of degrees of freedom |
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