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equivalent mass 等效質量。

equivalent weight

Strip - shape underground structures such as the tunnels and tubes for various uses can be treated as a beam on elastic foundation under earthquake condition , although there exists soil - structure interaction , the foundation soil vibration is dominant in other words , analysis of earthquake response of the soil is essential to this end , simplified models , ( i . e equivalent mass system models based on some equivalence criteria ) are proposed , instead of a general 3 - d continuum model in this study , equivalence criteria are proposed and the simplified models are compared the single - mass - string model is proved to be valid and therefore applied to the analysis of earthquake response of the pearl river immersed tunnel 條裝地下結構如隧道、各種埋設管道等一般可看作彈性地基梁進行靜力及動力分析在地震條件下,結構與土相互作用,但土的振動成為主要因素為分析土的地震響應需把基土這一三維連續體作簡化處理,簡化成為等效多質點模型本文著重探討這種簡化模型的建立方法,推導等效方程,通過幾種簡化體系的分析比較,論證單質點串體系的合理性,并將其應用到廣州黃沙芳村珠江水下隧道工程的地震響應分析,為抗震設計提供依據

2 . to the circular plate working in axial symmetry vibration at resonant frequency , the equivalent mass in analytical form is derived , that ' s is , , and further , the equivalent compliance is obtained using the formula c = 1l 2 m 對于工作在諧振頻率下做軸對稱運動的階梯圓板,采用解析法求得它的等效質量,并由c = 1 / ~ 2m求得等效彈性系數。

In this article based on vibration theory of the flexural plate , the frequency equation , the equivalent mass and radiation impedance are derived and further , design theory is introduced 本文從薄圓板彎曲振動理論出發,推導了這種階梯圓盤的頻率方程、等效質量、等效彈性和輻射阻抗,并進而提出了這種階梯圓盤的一般設計方法。

The total shielding effects of the materials with certain thickness for fission neutron and - ray are all much better than iron , and the equivalent masses are lower than iron at same shielding effect 結果表明:在達到一定厚度后,這些材料對裂變中子、的總屏蔽效果均超過鐵,且相同屏蔽效果下的鐵質量當量顯著下降。

During the course of the example computing this paper also discusses how to get the rigid measure of the solid tires , equivalent mass of the boom and equivalent rigid measure of the boom 在實例計算過程中也給出了實體橡膠輪胎的剛度和階梯懸臂梁的等效質量、等效剛度的近似計算方法,這些算法使理論計算簡單可靠。

The price tag for an amg model is $ 25 , 000 - $ 35 , 000 higher than for the equivalent mass - production version 一輛amg款轎車的售價,比對等的量產版高2 . 5萬美元至3 . 5萬美元。

Research on the equivalent mass of spring 彈簧的等效質量研究