本文選題：衰減域 + 周期性排樁�。� 參考：《北京交通大學(xué)》2015年碩士論文

【摘要】：摘要：排樁作為一種有效的環(huán)境減振措施,在工程中已有較廣泛的應(yīng)用,然而,排樁的周期性特性很少被研究者關(guān)注。由周期性理論可知,當(dāng)頻率處于衰減域范圍內(nèi)時(shí),周期性結(jié)構(gòu)對(duì)彈性波的傳播具有很好的抑制作用。因此,對(duì)排樁進(jìn)行設(shè)計(jì)時(shí)有必要考慮其周期性特性。現(xiàn)有的關(guān)于樁-土周期結(jié)構(gòu)研究,對(duì)樁、土均做了均勻介質(zhì)假定,而實(shí)際上土更接近于飽和土。本文采用飽和多孔介質(zhì)模型并基于周期性理論,研究了樁-飽和土周期結(jié)構(gòu)在環(huán)境減振中的應(yīng)用。主要內(nèi)容包括： (1)首先介紹了樁-飽和土周期結(jié)構(gòu)的基本理論,包括Biot飽和土波動(dòng)理論和周期性理論。介紹了用有限元法計(jì)算樁-飽和土周期結(jié)構(gòu)的求解步驟,并驗(yàn)證了方法的正確性。 (2)采用有限元法計(jì)算了樁-飽和土周期結(jié)構(gòu)的衰減域,研究了衰減域的特點(diǎn),并討論了相關(guān)參數(shù)對(duì)衰減域的影響。 (3)建立了樁-飽和土周期結(jié)構(gòu)減振的數(shù)值分析模型,完成了頻域響應(yīng)分析,驗(yàn)證了利用樁-飽和土周期結(jié)構(gòu)進(jìn)行環(huán)境減振的有效性。
[Abstract]:Absrtact: as an effective environmental vibration damping measure, pile row has been widely used in engineering. However, the periodic characteristics of pile row are seldom concerned by researchers. According to the theory of periodicity, when the frequency is in the range of attenuation, the periodic structure can restrain the propagation of elastic wave well. Therefore, it is necessary to consider its periodicity when designing the row pile. In the present study of pile-soil periodic structure, the soil and pile are assumed to be homogeneous, but in fact, the soil is closer to saturated soil. In this paper, the application of pile-saturated soil periodic structure in environmental vibration reduction is studied based on the saturated porous media model and periodicity theory. The main elements include: Firstly, the basic theory of pile-saturated soil periodic structure is introduced, including Biot saturated soil wave theory and periodicity theory. The procedure of calculating the periodic structure of pile-saturated soil by finite element method is introduced, and the correctness of the method is verified. 2) the attenuation region of the pile-saturated soil periodic structure is calculated by finite element method, the characteristics of the attenuation domain are studied, and the influence of relevant parameters on the attenuation domain is discussed. (3) the numerical analysis model of the pile-saturated soil periodic structure is established, and the frequency domain response analysis is completed, which verifies the effectiveness of using the pile-saturated soil periodic structure to reduce the ambient vibration.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU435

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