Introducing the theory and application of boundary element method on the sound radiation, giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method, and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software, simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell, realizing the audibility of the noise, using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box, and completing the whole simulation process of the vibration noise of the gear box
綜合介紹了邊界元法在聲輻射問題上的理論及應用；並給出了運用邊界元法分析軟體求解振動聲輻射問題的過程。闡述了有限元法和邊界元法的耦合理論及組合分析方法，並以封閉鼓形薄
殼為分析對象進行了相應的分析。利用數字計算軟體編制了噪聲數據模擬程序，並模擬了通過組合方法分析封閉鼓形薄
殼瞬態響應聲場而獲得一關鍵點的聲壓數據，實現聲音的可聽化，隨后通過虛擬現實工具實現了該情形下橢
球殼振動噪聲的虛擬模擬。
In 3d geodynamics numerical simulation research, it is often required to mesh the whole earth or part of the spherical shell, and the size of mesh is much more important to our research
摘要在研究大尺度的三維地
球動力學問題的數值模擬過程中，往往需要對整個
球體或部分
球殼生成計算網格，而且網格單元的尺寸對所研究的問題尤為重要。
Specifically, to a test particle, its mass defect is am = m _ ( 0 ) - m, where mo and m are the mass of the particle when it is in the infinity and in the grav - itational field, respectively. to a spherical shell ( or a solid sphere ), its mass defect is am = m _ ( 0 ) - m, where mo is the total mass of the matter scattering in the infinity and m is the mass of the gravitational spherical shell ( or the gravitational sphere ) combined by the matter scattering in the infinity
具體來說，對于試驗粒子，當它由無窮遠處運動到引力場中某點時，其質量由m _ 0變為m ，發生的質量虧損為m = m _ 0 - m ；對于
球殼或固體
球，當組成
球殼或固體
球的這些物質分散在無窮遠處時，總質量為m _ 0 ，當這些分散在無窮遠處的物質結合成
球殼或固體
球時，其質量變為m ，發生的質量虧損為m = m _ 0 - m 。
Studies on the pathogenicity of sphaeropsis sapinea
松
球殼孢菌的致病性研究
Under action of uniformly or polynomial distributed load, upper and lower critical loads of revolving shells ( including conical shells, spherical shells and quartic polynomial shells ) with uniform thickness, linearly, exponentially or polynomial variable thickness were evaluated
給出了均布或多項式分佈荷載作用下，等厚度、線性、指數型或多項式型變厚度的圓錐
殼、
球殼或四次多項式型旋轉
殼的上、下臨界荷載。
The effects of contact potential differences ( cpd ) in the experiments for testing coulomb ' s inverse square law and detecting the photon rest mass based on the concentric metal spheres were discussed, and the ultimate restrictions on hte experimental sensitivities due to cpd were presented for static experiments and dynamic ones respectively
摘要分析基於同心導體
球殼方法檢驗庫侖反平方定律和光子靜止質量的實驗中接觸勢的影響，並分別給出了靜態和動態實驗中接觸勢對實驗靈敏度的限制。
The compatible boundary conditions are evidently uniform tractions applied on the inner and outer surfaces of the shell.
可相容的邊值條件顯然是作用在
球殼的內表面和外表面上的均勻曳力。
It is important to analyze the stresses and reinforcement design of spherical shell with transnormal nozzle because it is widely used in petroleum > chemicak nuclear electric and other industries. first of all, in order to explore and master the characteristic of stress distribution on this structure and to find reinforcement design which can accommodate to different instances, the stresses of a series of models with different t / t and r / r were analyzed by the finite element procedure - ansys
首先，為了更進一步了解和掌握
球殼超標開孔平齊接管結構的應力分佈特點，並找到適用於不同情況下的補強設計方法，本文利用ansys有限元分析計算程序對不同開孔率和不同厚度比的一系列
球殼超標開孔平齊接管結構進行了應力分析，得到了應力分佈曲線和應力集中系數曲線。
The best spherical windows parameters are chosen according to rms of phase. stress - birefringence of laser windows is deduced by using index ellipsoid
分析了溫升和內外壓強差作用下平板、
球殼窗口的附加相移，用光率體橢
球法推導應力雙折射。
Investigation on the dynamic displacement response of thin spherical aluminium shell under blasting shock loading of explosive charge
空中爆炸沖擊波作用下薄壁鋁
球殼體大變形響應的實驗研究
Abstract : in this article, some problems existing in the design of apheroidal tank were briefly stated, including the advantages and disadvantages of use of quenched and tempered high strength steel as the material of spheroidal tank shell, thedividing type of the shell, the welding process and the occurrence of the welding crack. thenmthe measures to solve these problems were proposed
文摘:本文簡述了調質高強度鋼用於
球罐
殼體材料的優缺點和
球罐設計中有關
球殼的分割方式，焊接製造加工工藝，焊接裂紋的防止等問題，並提出了相應的建議。
In this article, some problems existing in the design of apheroidal tank were briefly stated, including the advantages and disadvantages of use of quenched and tempered high strength steel as the material of spheroidal tank shell, thedividing type of the shell, the welding process and the occurrence of the welding crack. thenmthe measures to solve these problems were proposed
本文簡述了調質高強度鋼用於
球罐
殼體材料的優缺點和
球罐設計中有關
球殼的分割方式，焊接製造加工工藝，焊接裂紋的防止等問題，並提出了相應的建議。
The motion of the shell due to an impulsive pressure may be examined in the same fashion as in the case of the cylinder problem.
由脈沖式的壓強引起的
球殼的運動，可以按照在圓管問題中所用的同一方式來進行分析。
Explicit iterated integral formulae of the moments in various order of the hitting times of geodesic spheres by brownian motions on rotationally symmetric manifolds are given in this paper
摘要主要給出了旋轉對稱流形上布朗運動關于測地
球面的首中時、
球殼的首出時的各階矩的迭代積分公式。
Summary of dimension calculation method and system of spherical shell slab in spherical tank
球形儲罐
球殼板片尺寸計算理論及系統概述
To validate the scheme, an air - filled, submerged in water spherical shell excited by a sound source located at the center of the sphere was calculated
為驗證數學模型的正確性，對點聲源激勵下無界水域中充氣
球殼進行了數值計算。
Research on non - die spherical shell forming process by shock wave functioning
爆炸沖擊載荷下
球殼無模成形過程研究
The relations between hartmann measuring data and calculating data are presented with stress - birefringence. temperature increments and phaseshifts of working caf2 window and sampling fluoride glass window are measured. during experiments, the simulating cavity is designed, on which the sampling plane and spherical window are fixed
推導了有應力雙折射時hartmann測量數據與計算數據之間的關系，測量了工作caf _ 2窗口和樣品氟玻璃窗口的溫升和附加相移，設計了模擬腔，將樣品氟玻璃平板和
球殼窗口加在模擬腔上進行實驗。
The simulation of submarine shell dynamic response to the shock wave of underwater explosions
薄壁
球殼內部爆炸的變形與破壞模擬
In the case of 16 boundaries, cubic b - spline function taken as trial function, the solutions to nonlinear stability of truncated conical shells and spherical shells with variable thickness were obtained by the method of point collocation
在16種邊界條件下，以三次b樣條函數為試函數，用配點法計算變厚度開頂圓錐殼和球殼的非線性穩定。
